A generic method to optimize a redundant serial robotic manipulator's structure

In this paper, an optimization method for a redundant serial robotic manipulator's structure is proposed in order to improve their performance. Optimization was considered in terms of kinematics using the proposed objective function and the non-linear Levenberg-Marquardt algorithm for multi-variate optimization. Range limits of the joints, bounds of the design parameters, and a constrained workspace are enforced in the proposed method. A desired manipulator can be optimized to cover the required task points using dimensional synthesis. This approach effectively optimizes the link lengths of the manipulator and minimizes the position and orientation errors of the tool center point. A commercial heavy-duty hydraulic, underground tunneling manipulator was used to demonstrate the capability of the proposed optimization method. The obtained results encourage the use of the proposed optimization method in automated construction applications, such as underground tunneling, where the confined environment and the required task add challenges in the design of task-based robotic manipulators.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Automation and Hydraulic Engineering, Research group: Mobile manipulation, Sandvik Mining and Construction Oy
Contributors: Kivelä, T., Mattila, J., Puura, J.
Number of pages: 8
Pages: 172-179
Publication date: 1 Sep 2017
Peer-reviewed: Yes

Publication information

Journal: Automation in Construction
Volume: 81
ISSN (Print): 0926-5805
Ratings: 
  • Scopus rating (2017): CiteScore 5.36 SJR 1.613 SNIP 2.578
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Civil and Structural Engineering, Building and Construction
Keywords: Computer-aided design, Constraint, Optimization, Redundant, Robotic, Serial manipulator, Synthesis, Workspace
Source: Scopus
Source ID: 85020881925

Research output: Contribution to journalArticleScientificpeer-review

Airtightness of residential buildings in Finland

Single-family buildings and apartments in multi-family apartment buildings have been studied in Finland in two large-scale studies between the years 2002 and 2009. This paper is based on the measurements of airtightness of 170 single-family detached houses and 56 apartments by fan pressurisation method at 50 Pa.The mean air change rate of 10 autoclaved aerated concrete block, 10 shuttering concrete block, 10 concrete element, 10 brick masonry, 10 lightweight aggregate concrete block, 100 timber-framed, and 20 log single-family houses was 1.5 h<sup>-1</sup>, 1.6 h<sup>-1</sup>, 2.6 h<sup>-1</sup>, 2.8 h<sup>-1</sup>, 3.2 h<sup>-1</sup>, 3.9 h<sup>-1</sup> and 6.0 h<sup>-1</sup>, respectively. In concrete-built multi-storey houses, in which the intermediate floor was cast on site, the mean n<inf>50</inf>-value of 23 apartments was 0.7 h<sup>-1</sup>. The mean n<inf>50</inf>-value of 20 apartments in multi-storey houses built from concrete elements was 1.6 h<sup>-1</sup>. 16 apartments in timber-framed multi-storey houses had a mean n<inf>50</inf>-value 2.9 h<sup>-1</sup>.Factors like construction method and insulation material (polyurethane insulation) in timber-framed houses, seam insulation material in log houses and ceiling structure in heavyweight buildings among others were found to have an effect on the average values of air change rates. The mean values of airtightness do not satisfy the recommended level of airtightness in Finland. Most important result, however, is that good airtightness of individual houses was reached within all house groups regardless of the choice of structure, storeys, ventilation system or technology of construction.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University, Department of Civil and Structural Engineering
Contributors: Vinha, J., Manelius, E., Korpi, M., Salminen, K., Kurnitski, J., Kiviste, M., Laukkarinen, A.
Number of pages: 13
Pages: 128-140
Publication date: 1 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 93
Issue number: P2
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2015): CiteScore 4.37 SJR 2.067 SNIP 2.449
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Environmental Engineering, Geography, Planning and Development, Building and Construction
Keywords: Air change rate, Air leakage, Airtightness, Residential buildings
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 84938085676

Research output: Contribution to journalArticleScientificpeer-review

A life cycle assessment of two residential buildings using two different LCA database-software combinations: Recognizing uniformities and inconsistencies

Traditionally, the emissions embodied in construction materials have not been considered important; however, they are becoming crucial due to the short time-frame in which the emissions should be reduced. Moreover, evaluating the environmental burden of construction materials has proven problematic and the reliability of the reported impact estimates is questionable. More reliable information from the construction sector is thus urgently needed to back and guide decision-making. Currently, the building sector environmental impact assessments predominantly employ commercial software with environmental impact databases and report results without knowledge about the impact of the software/database choice on the results. In this study, estimates for the embodied environmental impacts of residential construction from the two most widely used life cycle assessment (LCA) database-software combinations, ecoinvent with SimaPro software and GaBi, are compared to recognize the uniformities and inconsistencies. The impacts caused by two residential buildings of different types, a concrete-element multi-story residential building and a detached wooden house, both located in Finland, were assessed, including all building systems with a high level of detail. Based on the ReCiPe Midpoint method, fifteen impact categories were estimated and compared. The results confirm that the tool choice significantly affects the outcome. For the whole building, the difference is significant, around 15%, even in the most widely assessed category of Climate Change, and yields results that lean in different directions for the two cases. In the others, the estimates are entirely different, 40% or more in the majority of the categories and up to several thousand percentages of difference. The main conclusion is that extensive work is still urgently needed to improve the reliability of LCA tools in the building sector in order to provide reliable and trustworthy information for policy-making.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Responsible Construction, Civil Engineering, University of Iceland, Aalto University
Contributors: Emami, N., Heinonen, J., Marteinsson, B., Säynäjoki, A., Junnonen, J. M., Laine, J., Junnila, S.
Number of pages: 20
Publication date: 14 Jan 2019
Peer-reviewed: Yes

Publication information

Journal: Buildings
Volume: 9
Issue number: 1
Article number: 20
ISSN (Print): 2075-5309
Original language: English
ASJC Scopus subject areas: Architecture , Civil and Structural Engineering, Building and Construction
Keywords: Buildings, Comparison, Construction, GaBi, Life cycle assessment, SimaPro
Electronic versions: 
Source: Scopus
Source ID: 85060297299

Research output: Contribution to journalArticleScientificpeer-review

Analysis of hygrothermal parameters in Finnish and Lithuanian multi-family buildings before and after energy retrofits

This study focuses on analyzing temperature- and moisture-related parameters based on data from 45 Finnish and 20 Lithuanian multi-family buildings. The data consist of two rounds of 2-month data-logging (1-h interval) of indoor temperature and relative humidity at two locations: one representing average occupied zone and the other one nearby the coldest spot of the building envelope. Between the two rounds of data-logging, 37 buildings from Finland and 15 buildings from Lithuania underwent retrofits, aiming to improve their energy efficiency. Measurement data were coupled with outdoor data from national weather stations, based on which a temperature factor (fc) and excess indoor moisture content (Δv) were calculated. Based on the results, fc was significantly higher in Lithuanian case buildings after the retrofits, whereas no significant differences were observed in Finnish buildings. In addition, Δv was significantly lower in Finnish case buildings after retrofits, whereas an opposite trend was seen in the Lithuanian buildings.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Concrete and Bridge Structures, Kaunas University of Technology, National Public Health Institute
Contributors: Leivo, V., Kiviste, M., Aaltonen, A., Prasauskas, T., Martuzevicius, D., Haverinen-Shaughnessy, U.
Number of pages: 17
Publication date: 2019
Peer-reviewed: Yes
Early online date: 1 Apr 2018

Publication information

Journal: Journal of Building Physics
Volume: 42
Issue number: 4
ISSN (Print): 1744-2591
Original language: English
ASJC Scopus subject areas: Building and Construction, Materials Science(all)
Keywords: indoor moisture excess, relative humidity, surface temperature, Temperature, temperature factor
Electronic versions: 
Source: Scopus
Source ID: 85045857327

Research output: Contribution to journalArticleScientificpeer-review

Analysis of thermo-active pile structures and their performance under groundwater flow conditions

Geothermal heat pump systems (GHPSs) are economically efficient and renewable environmentally friendly energy production systems in which the ground acts as a heat source in winter and a heat sink in summer. New methods have been developed to increase the economic efficiency of GHPSs, including using pile foundations as dual-purpose structures in energy production and load transfer from building to ground. The performance of such energy pile foundations in cold climate regions was assessed numerically in this study by considering groundwater flow effects and short-term imbalanced seasonal thermal loadings. The structural behaviour of frictional pile foundations was also analysed using soil elasto-plastic behaviour and assuming non-linear sliding contact at the pile-soil interface. The results indicated that using energy pile foundations under medium groundwater flow (around 1.65E - 8 m/s), the productivity of system is improved by around 20% compared with a saturated conditions with no groundwater flow. They also indicated that no sliding occurred between the frictional pile shaft and the surrounding soil. However, the stresses in the frictional pile shaft decreased significantly in comparison with the end-bearing conditions. Moreover, there was a significant increase in the mobilised shaft friction at the pile-soil interface, particularly in summer mode.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), University of Oulu
Contributors: Gashti, E. H. N., Malaska, M., Kujala, K.
Number of pages: 8
Pages: 1-8
Publication date: 11 Aug 2015
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 105
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2015): CiteScore 4.07 SJR 2.04 SNIP 2.144
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Energy pile foundations, Geothermal energy, Groundwater flow, Nordic countries, Structural behaviour, Thermo-active infrastructures
Source: Scopus
Source ID: 84938855851

Research output: Contribution to journalArticleScientificpeer-review

An approach to combining related notifications in large-scale building management systems with a rehabilitation facility case study

ICT advances have enabled the incorporation of multiple devices that monitor various aspects of the environment into building management (BM) systems. The data from these devices is used to detect multiple abnormal situations, which require the awareness of system users and/or timely response. However, the number of abnormal situations is usually large, and delivering all of the associated notifications is overwhelming for users, rather than helping them to interpret the ongoing status of the environment. This work proposes a novel approach for combining ongoing notifications in the monitoring systems by their types, priorities, locations, and receivers. The approach is based on formal classification of possible alarms and runtime analysis of ongoing notifications with the aim of reducing repeating information pieces delivered as part of multiple notifications. The paper provides details of combination principles of notifications and applies them to real data from a rehabilitation facility. The results show a reduction in the users' information load of approximately 42% of the peak number of ongoing notifications. It is expected that the proposed approach will improve situation awareness in the managed facilities – enabling better and faster decisions on the ongoing status of the environment.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Automation and Hydraulic Engineering, FAST Lab.
Contributors: Evchina, Y., Martinez Lastra, J. L.
Number of pages: 11
Pages: 106-116
Publication date: 31 Mar 2018
Peer-reviewed: Yes
Early online date: 14 Dec 2017

Publication information

Journal: Automation in Construction
Volume: 87
ISSN (Print): 0926-5805
Ratings: 
  • Scopus rating (2018): CiteScore 6.35 SJR 1.408 SNIP 2.589
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Civil and Structural Engineering, Building and Construction
Keywords: Alarm classification, Alarm design, Alarm management, Building management systems, Notification management
Source: Scopus
Source ID: 85037985629

Research output: Contribution to journalArticleScientificpeer-review

Assessing population vulnerability towards summer energy poverty: Case studies of Madrid and London

Climate change is expected to increase the frequency and duration of hot weather and its associated adverse health effects. In dense urban areas, these phenomena will be exacerbated by the Urban Heat Island (UHI) effect and indoor overheating. This paper assesses population exposure and vulnerability to high summer temperatures by exploring the geospatial connection between the UHI, housing energy efficiency and overheating risk, and social vulnerability indicators, such as income and the elderly population. Focusing on Madrid and London, two European cities with strong UHIs but contrasting drivers of indoor heat risk, the spatial distribution of selected indicators were analysed by means of Geographical Information Systems, and areas with the highest vulnerability towards summer energy poverty were identified. It was found that while ‘hot and vulnerable’ areas are present in both Madrid and London, there are significant differences in climate, socioeconomic distribution and housing between the two cities. In warmer climates such as Madrid, energy poverty—traditionally defined by wintertime heating—requires its definition to be broadened to include summertime cooling needs; in the context of climate change and urban warming trends, this may soon also be the case in northern cities such as London.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, Universidad Politecnica de Madrid
Contributors: Sanchez-Guevara, C., Núñez Peiró, M., Taylor, J., Mavrogianni, A., Neila González, J.
Number of pages: 12
Pages: 132-143
Publication date: 1 May 2019
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 190
ISSN (Print): 0378-7788
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Cooling energy demand, Elderly, Energy poverty, Fuel poverty, Heat vulnerability, London, Low income, Madrid, Urban heat island
Source: Scopus
Source ID: 85062277482

Research output: Contribution to journalArticleScientificpeer-review

Assessing uncertainty in housing stock infiltration rates andassociated heat loss: English and UK case studies

Strategies to reduce domestic heating loads by minimizing the infiltration of cold air through adventitious openings located in the thermal envelopes of houses are highlighted by the building codes of many countries. Consequent reductions of energy demand and CO2e emission are often unquantified by empirical evidence. Instead, a mean heating season infiltration rate is commonly inferred from an air leakage rate using a simple ratio scaled to account for the physical and environmental properties of a dwelling. The scaling does not take account of the permeability of party walls in conjoined dwellings and so cannot differentiate between the infiltration of unconditioned ambient air that requires heating, and conditioned air from adjacent dwellings that does not.A stochastic method is presented that applies a theoretical model of adventitious infiltration to predict distributions of mean infiltration rates and the associated total heat loss in any stock of dwellings during heating hours. The method is applied to the English and UK housing stocks and provides probability distribution functions of stock infiltration rates and total heat loss during the heating season for two extremes of party wall permeability. The distributions predict that up to 79% of the current English stock could require additional purpose-provided ventilation to limit negative health consequences. National models predict that fewer dwellings are under-ventilated. The distributions are also used to predict that infiltration is responsible for 3-5% of total UK energy demand, 11-15% of UK housing stock energy demand, and 10-14% of UK housing stock carbon emissions.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University of Nottingham, University of Oxford, London School of Hygiene and Tropical Medicine, University College London
Contributors: Jones, B., Das, P., Chalabi, Z., Davies, M., Hamilton, I., Lowe, R., Mavrogianni, A., Robinson, D., Taylor, J.
Number of pages: 13
Pages: 644-656
Publication date: 1 Oct 2015
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 92
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2015): CiteScore 4.37 SJR 2.067 SNIP 2.449
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: DOMVENT, Leakage, Model, Monte Carlo, Permeability, Ventilation
Source: Scopus
Source ID: 84934989246

Research output: Contribution to journalArticleScientificpeer-review

Carbon dioxide permeability of building materials and their impact on bedroom ventilation need

This research determined the carbon dioxide permeabilities of different materials and cellulose-insulated wall structures without a vapour barrier as well as the CO2 balance of bedroom air. Material tests have indicated that the CO2 permeabilities of building materials correlate closely with their water vapour permeabilities. Thus, the more permeable the external wall structures are, the bigger their impact on the CO2 content of indoor air. Yet, higher permeability allows more water vapour to pass through the structures, which make them more at-risk for condensation and mould growth. Some calculations on the CO2 balance of bedroom air were also made which indicated that the need of ventilation is not reduced by the use of gas permeable structures.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Niemelä, T., Vinha, J., Lindberg, R., Ruuska, T., Laukkarinen, A.
Number of pages: 10
Pages: 99-108
Publication date: 1 Jul 2017
Peer-reviewed: Yes

Publication information

Journal: Journal of Building Engineering
Volume: 12
ISSN (Print): 2352-7102
Ratings: 
  • Scopus rating (2017): CiteScore 2.8 SJR 0.753 SNIP 1.832
Original language: English
ASJC Scopus subject areas: Architecture , Civil and Structural Engineering, Building and Construction, Safety, Risk, Reliability and Quality, Mechanics of Materials
Keywords: Building materials, Carbon dioxide, Material properties, Material testing, Permeability
Electronic versions: 
URLs: 

Bibliographical note

INT=rak,"Niemelä, Timo"

Source: Scopus
Source ID: 85019363463

Research output: Contribution to journalArticleScientificpeer-review

Case study: developing campus spaces through co-creation

Higher education institutions are designed to support their core processes – learning, teaching, research, and societal impact. In order for university facilities to support these activities, it is crucial to determine together with the users what these activities are and how they are supposed to be developed in the future. This article examines the relationship between user needs and the service level in construction projects through a case study where a university cafeteria was renovated using a participatory design (PD) method called charrette. The aim of this case study was to study the effects of collaborative ways of working when applied to a space retrofit project, and how the co-created ideas are actualized during the project. Based on video observation, project document analysis, and survey questionnaires, this research shows that PD duly provides a positive impact on the resulting premises, even though every part of the project may not be successful. However, the use of PD during the concept design phase does not necessarily guarantee success. The accomplishments can be undone in the later phases of the project if collaboration is not extended through the entire project. Further, the findings of this case study revealed a framework of user needs that can be used in design management in order to enhance the user perspective.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Jyväskylän yliopisto
Contributors: Lundström, A., Savolainen, J., Kostiainen, E.
Number of pages: 18
Pages: 409-426
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: ARCHITECTURAL ENGINEERING AND DESIGN MANAGEMENT
Volume: 12
Issue number: 6
ISSN (Print): 1745-2007
Ratings: 
  • Scopus rating (2016): CiteScore 1.25 SJR 0.362 SNIP 0.908
Original language: English
ASJC Scopus subject areas: Building and Construction, Architecture , Business, Management and Accounting(all)
Keywords: campus retrofit, charrette, Co-creation, collaborative design, learning space, value-in-use
Source: Scopus
Source ID: 84979992936

Research output: Contribution to journalArticleScientificpeer-review

Classifying and clustering construction projects by customer satisfaction

Purpose - Construction is often a long-term project described as a dynamic and complex entity. This is one of the factors making the assessment of construction quality so difficult. The actors in the field of construction need versatile and systematic data about the quality of the construction process and the building in order to be able to operate in a customer-oriented manner and develop their own operations. The purpose of this paper is to examine the typical factors in a construction project as regards customer satisfaction. Design/methodology/approach - The cluster analysis differentiating between projects in this paper is conducted with a total of 831 construction projects. Findings - The paper reveals seven similar but nevertheless different clusters. What the best clusters as regards customer satisfaction has in common is that the management's professional skills and the cooperation methods are successful when compared to other areas of the cluster. Additionally, good cooperation methods predict good level of customer satisfaction. In all clusters, handover inspections has the lowest level of success. When examining various, good and poor projects, it may be stated that the same factors were successful in all of the projects. Originality/value - Improving the quality of construction projects from the customer's perspective has gained growing interest also in construction industry. Indeed, information about the project's success factors from the customer's perspective is needed in the construction business. Owing to the complex nature of construction and the special characteristics of project production, construction has had several problems in producing quality in a customer-oriented manner. This paper describes, the success factors from the viewpoint of customer satisfaction. Construction has become a service industry adopting methods from the field of service management but the use of "soft" measurement tools, such as customer satisfaction, is still at an early stage of development.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Responsible Construction, Civil Engineering, Aalto University, CEM Facility Services Research
Contributors: Kärnä, S., Sorvala, V. M., Junnonen, J. M.
Number of pages: 12
Pages: 387-398
Publication date: 1 Jan 2009
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 27
Issue number: 9-10
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2009): SJR 0.435 SNIP 0.895
Original language: English
ASJC Scopus subject areas: Human Factors and Ergonomics, Architecture , Building and Construction
Keywords: Construction industry, Customer satisfaction, Customer services quality, Finland
Source: Scopus
Source ID: 70349647042

Research output: Contribution to journalArticleScientificpeer-review

Cold-formed RHS T joints with initial geometrical imperfections

Generally, numerical simulations of structures are carried out in such a way as to most accurately repeat their real behavior. The current rules for finite element modeling of tubular joints oblige scientists and engineers to construct their numerical models considering initial imperfections. However, not all joints are sensitive to initial imperfections. Often consideration of initial imperfections brings no reasonable improvements in the accuracy of results, but severely complicates numerical simulations. In such cases, the effect of geometrical imperfections can be effectively replaced by a simple theoretical equation or neglected entirely. This paper evaluates the effect of initial geometrical imperfections on the structural behavior of cold-formed rectangular hollow section T joints. Imperfections are simulated using the conventional approach for thin-walled structures, applying corresponding buckling modes to the perfect geometry. The paper analyzes several buckling modes and their combinations to identify the most rational technique for simulation of imperfections under in-plane bending and axial loading. Based on the obtained results, parametric studies are conducted to investigate the effect of initial imperfections on joints with various geometry and material properties. The results demonstrate that initial imperfections reduce the resistance and initial stiffness of joints. However, the observed effect has been found sufficiently small to be safely ignored in computational analyses.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, St. Petersburg State Polytechnical University
Contributors: Garifullin, M., Bronzova, M. K., Heinisuo, M., Mela, K., Pajunen, S.
Number of pages: 14
Pages: 81-94
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Magazine of Civil Engineering
Volume: 80
Issue number: 4
ISSN (Print): 2071-4726
Ratings: 
  • Scopus rating (2018): CiteScore 2.75 SJR 1.062 SNIP 2.28
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Finite element analysis, Hollow section joint, Imperfection, Initial stiffness, Resistance
Electronic versions: 
Source: Scopus
Source ID: 85051540096

Research output: Contribution to journalArticleScientificpeer-review

Commissioning for nearly zero-energy building projects

Purpose - This article aims to reveal the benefits and opportunities that commissioning procedure has to offer for nearly zero-energy building (nZEB) projects. Another goal is to sculpture the commissioning process and, especially, commissioning consultant's tasks to fit nZEB projects.

Design/methodology/approach - The idea was to incorporate the literature from two fields: commissioning and nZEB, and find out if commissioning would fit nZEB projects. Challenges offered by nZEB technology were pointed out and the solutions offered to these problems by commissioning were established. Expert interviews were used to test the findings.

Findings - Commissioning was found valuable for complex nZEB projects and even worthwhile investing to in simple nZEB projects. Quality assurance is a huge task when the change to nZEB construction happens in 2020 and commissioning can be a valuable tool to prevent large-scale quality problems. A number of additions were made to the example commissioning process used in Finland today.

Originality/value - This article gives evidence for economical usability of commissioning procedure in nZEB projects and reason to start investigating the possibility to attach commissioning as a mandatory procedure to all nZEB projects.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University
Contributors: Kantola, M., Saari, A.
Number of pages: 13
Pages: 370-382
Publication date: 1 Jul 2014
Peer-reviewed: Yes

Publication information

Journal: Construction Innovation: Information, Process, Management
Volume: 14
Issue number: 3
ISSN (Print): 1471-4175
Ratings: 
  • Scopus rating (2014): CiteScore 1.13 SJR 0.544 SNIP 0.975
Original language: English
ASJC Scopus subject areas: Computer Science(all), Control and Systems Engineering, Civil and Structural Engineering, Building and Construction, Architecture
Keywords: Green buildings, Quality management, Sustainability
Source: Scopus
Source ID: 84907101373

Research output: Contribution to journalArticleScientificpeer-review

Condensation at the exterior surface of windows

New energy efficient windows have a higher risk for outdoor air vapour condensing to their exterior surface, when compared to older windows with lower thermal resistance. This external condensation can reduce visibility through the window, decrease owner satisfaction and affect the behaviour of window buyers and sellers. The purpose of this study was to analyse the impact of window U-value and other factors on the occurrence of external condensation. A combined heat and moisture transfer model was created and used for the calculations. According to the results, the duration and amount of external condensation are projected to increase in the future due to lower window U-values and climate change. Exterior surface emissivity, external shadings and building location had a big impact on the amount of yearly condensation hours, while window orientation and solar absorption coefficient had a smaller impact. There was also an interesting power-law-type correlation between yearly condensation hours and the median effective thickness of the condensation layer. The results help window manufacturers and building designers make more accurate decisions in their future work.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Laukkarinen, A., Kero, P., Vinha, J.
Number of pages: 10
Pages: 592-601
Publication date: 1 Sep 2018
Peer-reviewed: Yes

Publication information

Journal: Journal of Building Engineering
Volume: 19
ISSN (Print): 2352-7102
Ratings: 
  • Scopus rating (2018): CiteScore 3.06 SJR 0.682 SNIP 1.561
Original language: English
ASJC Scopus subject areas: Building and Construction, Architecture , Civil and Structural Engineering, Safety, Risk, Reliability and Quality
Keywords: Building physics, Condensation, Energy efficiency, Heat transfer, Moisture transfer, Windows
URLs: 
Source: Scopus
Source ID: 85049334016

Research output: Contribution to journalArticleScientificpeer-review

Consideration of energy consumption, energy costs, and space occupancy in Finnish daycare centres and school buildings

The building sector contributes up to 30% of global annual greenhouse gas emissions and consumes up to 40% of all energy. Failure to encourage energy-efficiency and low-carbon in new builds or retrofitting will lock countries into the disadvantages of poor performing buildings for decades. The journey towards low-carbon and energy efficient buildings starts with good design, commissioning and measuring. The share of energy costs can be up to 50% of all maintenance costs [7] in Finland. In the studied buildings the average costs were 39% for daycare centres and 45% for schools. Since the share of energy costs is remarkable in maintenance, it is important to find out the most concrete indicators to measure energy efficiency in practice. This study explores ways in which building usage and occupancy influences the energy cost in Finnish daycare centres and school buildings. This study shows that energy costs vary a lot between different energy efficiency indicators, i.e. there is great variation in energy costs regardless of the building age and when child or student density varies. Results indicated that actual use of space is profiled in the operational phase where the energy costs variation is remarkable.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Aalto University, VTT Technical Research Centre of Finland
Contributors: Sekki, T., Andelin, M., Airaksinen, M., Saari, A.
Number of pages: 8
Pages: 199-206
Publication date: 1 Oct 2016
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 129
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2016): CiteScore 4.64 SJR 2.055 SNIP 1.962
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Daycare centres, Energy consumption, Energy costs, Occupation, Schools
Source: Scopus
Source ID: 84982834048

Research output: Contribution to journalArticleScientificpeer-review

Corrosion products of carbonation induced corrosion in existing reinforced concrete facades

Active corrosion in reinforced concrete structures is controlled by environmental conditions and material properties. These factors determine the corrosion rate and type of corrosion products which govern the total achieved service life. The type and critical amount of corrosion products were studied by electron microscopy and X-ray diffractometry on concrete and reinforcement samples from existing concrete facades on visually damaged locations. The corrosion products in outdoor environment exposed concrete facades are mostly hydroxides (Feroxyhite, Goethite and Lepidocrocite) with a volume ratio to Fe of approximately 3. The results can be used to calibrate calculation of the critical corrosion penetration of concrete facade panels.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Department of Materials Science, Research group: Materials Characterization, Research area: Structural Engineering, Engineering materials science and solutions (EMASS), Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Köliö, A., Honkanen, M., Lahdensivu, J., Vippola, M., Pentti, M.
Number of pages: 8
Pages: 200-207
Publication date: Dec 2015
Peer-reviewed: Yes

Publication information

Journal: Cement and Concrete Research
Volume: 78
ISSN (Print): 0008-8846
Ratings: 
  • Scopus rating (2015): CiteScore 4.54 SJR 3.549 SNIP 3.127
Original language: English
ASJC Scopus subject areas: Materials Science(all), Building and Construction
Keywords: B. SEM, B. X-ray diffraction, C. Corrosion, D. Reinforcement, E. Concrete

Bibliographical note

ORG=rak,0.75
ORG=mol,0.25

Source: Scopus
Source ID: 84942989347

Research output: Contribution to journalArticleScientificpeer-review

Cost optimal and nearly zero (nZEB) energy performance calculations for residential buildings with REHVA definition for nZEB national implementation

This study determined cost optimal and nearly zero energy building (nZEB) energy performance levels following the REHVA definition and energy calculation methodology for nZEB national implementation. Cost optimal performance levels - meaning the energy performance leading to minimum life cycle cost - were calculated with net present value method according to the cost optimal draft regulation. The seven-step procedure was developed to conduct cost optimal and nZEB energy performance levels calculations in systematic and robust scientific fashion. It was shown that cost optimal primary energy use can be calculated with limited number of energy simulations as only four construction concepts were simulated and cost calculated. The procedure includes the specification of building envelope components based on specific heat loss coefficient and systems calculation with post processing of energy simulation results, without the need to use iterative approach or optimization algorithm. Model calculations were conducted for Estonian reference detached house to analyse the difference between the cost optimal and nZEB energy performance levels. Cost optimal energy performance level of Estonian reference detached house was 110 kW h/(m 2 a) primary energy including all energy use with domestic appliances and it was significantly lower than the current minimum requirement of 180 kW h/(m2 a).

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Sitra, the Finnish Innovation Fund, Aalto University, Tallinn University of Technology, Equa Simulation Finland Oy, Hevac O
Contributors: Kurnitski, J., Saari, A., Kalamees, T., Vuolle, M., Niemelä, J., Tark, T.
Number of pages: 10
Pages: 3279-3288
Publication date: Nov 2011
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 43
Issue number: 11
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2011): CiteScore 3.23 SJR 1.476 SNIP 2.548
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Cost optimal, Energy performance, EPBD recast, Global cost, Nearly zero energy buildings, nZEB, REHVA nZEB technical definition
Source: Scopus
Source ID: 80053300759

Research output: Contribution to journalArticleScientificpeer-review

Designers' performance evaluation in construction projects

Purpose - In a construction project, "participants' satisfaction" is one of the main dimensions used for measuring the successfulness of a project. Designers perform a major role in attaining the project goals and managing project complexity during production. The purpose of this paper is to examine the designers' performance as evaluated by the main participants: the client, the project consultant/manager and the main contractor, and to identify the main success factors of designer performance using the participants' evaluation. The study also aims to examine how the economic size of a project affects the project participants' assessment of the designer's performance. It is assumed that as the size of a project increases, so does the complexity of the project, which will affect the scope of work and demands on the designers' operational performance for the specific project level. Design/methodology/approach - The Finnish project evaluation and benchmark database was used in this study as empirical data. The quantitative data consists of surveys on the project level and are based on a multi-dimensional standard evaluation wherein the main participants evaluate each other's performances. The client, project consultant and main contractor evaluated the designer's performance. The data of the study consisted of a total of 892 evaluations. ANOVA analysis was used to examine the differences between the project participants' assessments based upon the different economic sizes of the projects. Findings - Contractors were satisfied with the designers' performance in small projects, whereas the client and the project consultant/manager rated the designers' performance most successful in large projects. This result may be due to small projects are typically simple and less complex, in which case design solutions are generally well-defined. Nonetheless, the participants' level of satisfaction follows the same factors. The main problems in the designers' performance were related to the design content: the flawlessness and comprehensiveness, as well as the compatibility and consistency of designs. These factors were emphasized particularly in the client's low satisfaction of the designer's performance. However, project participants were satisfied with the collaboration with designers; however, room for improvement could be found in internal communication and collaboration within the design teams. The findings illustrated that the assessment of the success rate of a project was party-specific, which was clearly affected by the size of the project, as large projects appeared to be more complex than smaller ones. Practical implications - The findings suggested that there is a need to develop project-specific practices in managing multidisciplinary design teams. Additionally, particularly in large projects, designers should focus more on solving problems and design requirements occurring at the construction site. However, this should be implemented in such a way that this does not interfere with the design activities conducted with the client and project management. While client satisfaction is low in the small projects, designers should focus more on customer-oriented methods to serve client needs better. Originality/value - In construction project management studies, there is a need to measure the importance that various participants assign to different success factors. Since project success factors depend on project type, a more project-specific approach is suggested to identify the main parameters for measuring project success. This study provides a holistic approach of the designers' performance, which contributes to the theory of project success and designers' performance improvement.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Responsible Construction, Aalto University
Contributors: Kärnä, S., Junnonen, J. M.
Number of pages: 16
Pages: 154-169
Publication date: 1 Jan 2017
Peer-reviewed: Yes

Publication information

Journal: ENGINEERING, CONSTRUCTION AND ARCHITECTURAL MANAGEMENT
Volume: 24
Issue number: 1
ISSN (Print): 0969-9988
Ratings: 
  • Scopus rating (2017): CiteScore 1.9 SJR 0.653 SNIP 1.103
Original language: English
ASJC Scopus subject areas: Architecture , Civil and Structural Engineering, Building and Construction, Business, Management and Accounting(all)
Keywords: Critical success factors, Customer satisfaction, Design management, Performance measures, Project management, Project participants satisfaction
Source: Scopus
Source ID: 85009354387

Research output: Contribution to journalArticleScientificpeer-review

Development of an England-wide indoor overheating and air pollution model using artificial neural networks

With the UK climate projected to warm in future decades, there is an increased research focus on the risks of indoor overheating. Energy-efficient building adaptations may modify a buildings risk of overheating and the infiltration of air pollution from outdoor sources. This paper presents the development of a national model of indoor overheating and air pollution, capable of modelling the existing and future building stocks, along with changes to the climate, outdoor air pollution levels, and occupant behaviour. The model presented is based on a large number of EnergyPlus simulations run in parallel. A metamodelling approach is used to create a model that estimates the indoor overheating and air pollution risks for the English housing stock. The performance of neural networks (NNs) is compared to a support vector regression (SVR) algorithm when forming the metamodel. NNs are shown to give almost a 50% better overall performance than SVR.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, London School of Hygiene and Tropical Medicine, Public Health England
Contributors: Symonds, P., Taylor, J., Chalabi, Z., Mavrogianni, A., Davies, M., Hamilton, I., Vardoulakis, S., Heaviside, C., Macintyre, H.
Number of pages: 14
Pages: 606-619
Publication date: 1 Nov 2016
Peer-reviewed: Yes

Publication information

Journal: JOURNAL OF BUILDING PERFORMANCE SIMULATION
Volume: 9
Issue number: 6
ISSN (Print): 1940-1493
Ratings: 
  • Scopus rating (2016): CiteScore 1.96 SJR 0.877 SNIP 1.399
Original language: English
ASJC Scopus subject areas: Architecture , Building and Construction, Modelling and Simulation, Computer Science Applications
Keywords: indoor air pollution, machine learning, metamodelling, neural networks, overheating, stock modelling
Source: Scopus
Source ID: 84963632445

Research output: Contribution to journalArticleScientificpeer-review

Economic viability of energy-efficiency measures in educational buildings in Finland

The economic viability of novel energy-efficient design concepts has been evaluated in Finnish educational buildings. The total energy consumption of representative target buildings with each design concept has been found using the whole-building simulation tool IDA Indoor Climate and Energy 4.0, and the financial viability has been assessed using the discounted payback period method. Different thermal insulation and air tightness properties of the building envelope, and different ventilation's heat recovery efficiency assumptions and heat distribution options have been investigated. The results suggest that a prudent attitude should be taken toward the investments in ultra-low-energy designs. Total energy-saving potential of 25-32% can be obtained. The payback periods varied from 15 to more than 40 years. The results can be generalized in cold climates and techno-economic conditions similar to Finland.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University, Luleå University of Technology, Surface and Corrosion Science, Tallinn University of Technology
Contributors: Alanne, K., Schade, J., Martinac, I., Saari, A., Jokisalo, J., Kalamees, T.
Number of pages: 8
Pages: 120-127
Publication date: May 2013
Peer-reviewed: Yes

Publication information

Journal: ADVANCES IN BUILDING ENERGY RESEARCH
Volume: 7
Issue number: 1
ISSN (Print): 1751-2549
Ratings: 
  • Scopus rating (2013): CiteScore 1.1 SJR 0.481 SNIP 0.919
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: economic analysis, energy efficiency, life-cycle cost, schools
Source: Scopus
Source ID: 84882650828

Research output: Contribution to journalArticleScientificpeer-review

Effect of energy measures on the values of energy efficiency indicators in Finnish daycare and school buildings

The potential for cost-effective energy efficiency improvements is very large. However, major impacts from energy efficiency improvements can take decades to be fully realised. In addition, today the building sector is requested to define strategies and decide which energy retrofit actions to undertake in their existing building stock. Since building users are very often encouraged to save energy based on measured energy consumption, it is essential to know that the indicator used to assess energy efficiency is really guiding the building use towards sustainability. This study examines how energy measures reflect energy efficiency indicators and how they can be combined so that the result is user-driven and reflects the reality of the building operational phase energy efficiency better. This study shows that energy efficiency can be measured by using alternative indicators and confirms that different indicators make a different impact on results showing efficiency. In the studied cases savings in energy consumption can be achieved by investing in technical measures or operating the building automation system based on actual occupancy. Results indicated that the size of the effect of energy measures is roughly similar in a case of alternative indicators of energy efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Aalto University, VTT Technical Research Centre of Finland
Contributors: Sekki, T., Airaksinen, M., Saari, A.
Number of pages: 9
Pages: 124-132
Publication date: 15 Mar 2017
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 139
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2017): CiteScore 4.96 SJR 2.061 SNIP 2.12
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Daycare centres, Energy efficient indicators, Energy savings, Schools
Source: Scopus
Source ID: 85009126496

Research output: Contribution to journalArticleScientificpeer-review

Effects of added glazing on Balcony indoor temperatures: Field measurements

In this study the temperatures on 22 balconies (17 glazed) and adjacent flats were monitored with an aim to determine the key factors affecting the ability of a glazed balcony to warm up and remain warm without a heater. Considered were glazed balconies in different locations, the amount of glazing and building heat loss, the tightness of balcony vertical structures, and balcony ability to capture solar radiation. Temperature monitoring showed that over a year the air temperature of both glazed and unglazed balconies remained almost without an exception above the outdoor air temperature. On average, the temperatures of unglazed balconies were 2.0 °C and those of glazed balconies 5.0 °C higher than the outdoor air temperature. The three key factors affecting the glazed balcony temperatures seemed to be the level of air leakage in the balcony vertical structures, the balcony's ability to capture solar radiation, and the heat gain from an adjacent flat, in that order. The air tightness of the glazing was the most crucial factor, since it affected the results all the year round. Solar radiation was important from spring to autumn and heat gain in midwinter.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Research group: Building Physics
Contributors: Hilliaho, K., Köliö, A., Pakkala, T., Lahdensivu, J., Vinha, J.
Number of pages: 15
Pages: 458-472
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 128
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2016): CiteScore 4.64 SJR 2.055 SNIP 1.962
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Balcony glazing, Balcony temperatures, Field monitoring, Prefabricated building, Temperature monitoring
URLs: 
Source: Scopus
Source ID: 84978370516

Research output: Contribution to journalArticleScientificpeer-review

Effects of energy retrofits on Indoor Air Quality in multifamily buildings

We assessed 45 multifamily buildings (240 apartments) from Finland and 20 (96 apartments) from Lithuania, out of which 37 buildings in Finland and 15 buildings in Lithuania underwent energy retrofits. Building characteristics, retrofit activities, and energy consumption data were collected, and Indoor Air Quality (IAQ) parameters, including carbon monoxide (CO), nitrogen dioxide (NO 2 ), formaldehyde (CH 2 O), selected volatile organic compounds (benzene, toluene, ethylbenzene, and xylenes (BTEX), radon, and microbial content in settled dust were measured before and after the retrofits. After the retrofits, heating energy consumption decreased by an average of 24% and 49% in Finnish and Lithuanian buildings, respectively. After the retrofits of Finnish buildings, there was a significant increase in BTEX concentrations (estimated mean increase of 2.5 µg/m 3 ), whereas significant reductions were seen in fungal (0.6-log reduction in cells/m 2 /d) and bacterial (0.6-log reduction in gram-positive and 0.9-log reduction in gram-negative bacterial cells/m 2 /d) concentrations. In Lithuanian buildings, radon concentrations were significantly increased (estimated mean increase of 13.8 Bq/m 3 ) after the retrofits. Mechanical ventilation was associated with significantly lower CH 2 O concentrations in Finnish buildings. The results and recommendations presented in this paper can inform building retrofit studies and other programs and policies aimed to improve indoor environment and health.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Concrete and Bridge Structures, National Public Health Institute, Lappeenranta University of Technology, Kaunas University of Technology
Contributors: Du, L., Leivo, V., Prasauskas, T., Täubel, M., Martuzevicius, D., Haverinen-Shaughnessy, U.
Publication date: 28 Mar 2019
Peer-reviewed: Yes

Publication information

Journal: Indoor Air
ISSN (Print): 0905-6947
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Building and Construction, Public Health, Environmental and Occupational Health
Keywords: bacteria, chemical exposure, fungi, microbial exposure, radon, residential building

Bibliographical note

INT=CENG,"Haverinen-Shaughnessy, Ulla"

Source: Scopus
Source ID: 85064549626

Research output: Contribution to journalArticleScientificpeer-review

Energy consumption of Finnish schools and daycare centers and the correlation to regulatory building permit values

The national building codes set requirements for building energy efficiency in many countries. The purpose of this study was to improve understanding on the measured and calculated energy efficiency of Finnish schools and daycare centers. The study analyzed the energy consumption of 134 schools and 71 daycare centers and compared the regulatory building permit calculations to measured values for 18 case buildings. According to the results, the specific electricity consumption (kW h/(m2 a)) has increased in schools but not in daycare centers. The heating energy consumption was lower in schools, but this might be explained by that they had clearly larger gross floor area than daycare centers. When compared to the technical requirements in the building code, the actual heating energy consumption has decreased less than what the changes in the building code would suggest. The building energy consumption calculated for building permits with the monthly calculation method and standard use clearly underestimated the measured building energy consumption. The differences were larger in heating energy than in electricity consumption. In conclusion, different regulatory limit values should be considered for the two building types. The calculation methods and input data should be analyzed to ensure that they truly guide towards cost-optimal design choices.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Ruusala, A., Laukkarinen, A., Vinha, J.
Number of pages: 13
Pages: 183-195
Publication date: 1 Aug 2018
Peer-reviewed: Yes

Publication information

Journal: Energy Policy
Volume: 119
ISSN (Print): 0301-4215
Ratings: 
  • Scopus rating (2018): CiteScore 5.45 SJR 1.988 SNIP 1.786
Original language: English
ASJC Scopus subject areas: Energy(all), Management, Monitoring, Policy and Law, Building and Construction, Energy (miscellaneous)
Keywords: Building permit, Daycare center, Measured building energy consumption, Monthly calculation method, School building, Standard use
Source: Scopus
Source ID: 85046336515

Research output: Contribution to journalArticleScientificpeer-review

Energy saving and indoor climate effects of an added glazed facade to a brick wall building: Case study

This study is focused on the energy saving and indoor climate analysis of the renovation of a 1930's brick-walled building in the moderately cold climatic conditions of Malmö in southern Sweden. Three facades of the building were glassed in and the ventilation system was renewed. The purpose of this study was to investigate the effect the added glazing would have on the building's energy demand and indoor climate. Measurements were taken on site and were used as the input for computational studies performed with the help of IDA Indoor Climate and Energy software (IDA-ICE). The study showed that the heating energy demand was reduced after the glazing installation by between 5.6% and 25.3%. In addition, the mean annual temperature difference between the cavity space and the outside air was from 5.2 °C to 11.4 °C higher, depending on the design. A number of different design options were explored for the winter and also summer case-studies, as it was apparent that adding glazing decreased the level of comfort in the building's indoor environment in summer time. This problem could be solved by increasing the cavity air flow or adding new solar shading to the front or back of the glazing.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Service Life Engineering of Structures, Department of Civil Engineering, Lunds Universitet / Lunds Tekniska Högskola
Contributors: Hilliaho, K., Nordquist, B., Wallentèn, P., Hamid, A. A., Lahdensivu, J.
Number of pages: 17
Pages: 246-262
Publication date: 1 Sep 2016
Peer-reviewed: Yes

Publication information

Journal: Journal of Building Engineering
Volume: 7
ISSN (Print): 2352-7102
Ratings: 
  • Scopus rating (2016): CiteScore 2 SJR 0.571 SNIP 1.069
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Mechanics of Materials, Safety, Risk, Reliability and Quality, Building and Construction, Architecture
Keywords: Added glazing, Building energy simulation, Energy saving effects, Field monitoring, IDA-ICE, Indoor climate
Source: Scopus
Source ID: 84978795756

Research output: Contribution to journalArticleScientificpeer-review

Energy saving in working hydraulics of long booms in heavy working vehicles

Hybridization of heavy off-highway working vehicles brings considerable energy savings in the form of a downsized internal combustion engine (ICE) by means of reduced no-load losses. In this paper, a novel energy saving opportunity in working hydraulics at the end of long booms of working vehicles is proposed. In traditional off-highway working vehicles, the working hydraulics is supplied through pipes, hoses, and valves by a hydraulic pump located near the main engine. A significant amount of energy is lost in long pipelines and hoses as well as in valve throttles. A new topology is introduced to supply the power along the long boom; the power for a hydraulic actuator is supplied by an integrated electro-hydraulic energy converter (IEHEC), which is located at the boom end. The electrical energy to the converter is supplied through electrical cables, which have negligible losses compared with a conventional fluid power supply with long pipelines. The converter transforms the electrical energy into hydraulic energy at the end of the boom, and may also recover energy for additional energy savings.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Powertrain design, Research group: Fluid power automation in mobile machines, Lappeenranta University of Technology, VTT Technical Research Centre of Finland
Contributors: Immonen, P., Ponomarev, P., Åman, R., Ahola, V., Uusi-Heikkilä, J., Laurila, L., Handroos, H., Niemelä, M., Pyrhönen, J., Huhtala, K.
Number of pages: 8
Pages: 125-132
Publication date: 1 May 2016
Peer-reviewed: Yes

Publication information

Journal: Automation in Construction
Volume: 65
ISSN (Print): 0926-5805
Ratings: 
  • Scopus rating (2016): CiteScore 4.64 SJR 1.395 SNIP 2.737
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Civil and Structural Engineering, Building and Construction
Keywords: Energy efficiency, Hybrid vehicles, Off-highway heavy working vehicles
Source: Scopus
Source ID: 84959532162

Research output: Contribution to journalArticleScientificpeer-review

Ensuring functionality of a nearly zero-energy building with procurement methods

Purpose: The purpose of this paper is to show the results of the task given by a major research program concerning low-energy building and indoor environment. The task was to develop contracting document model layouts to be used in zero-energy building (ZEB) and nearly zero-energy building (nZEB) construction projects. Design/methodology/approach: A workshop method was chosen for gathering information and developing the layouts. Findings: In the debate in the workshop three main topics arose: the selection of project delivery system, the use of performance controller for the heating, ventilation and air-conditioning (HVAC) systems and making innovation possible by making the call for bids as loose as possible. Research limitations/implications: The use of performance controller could be investigated more, and more accurate information and knowledge about the best practices on nZEB construction can be captured as the industry moves in that direction and more projects will appear. Originality/value: The goals of the research program were met and also the main issues of nZEB construction contracting were documented, which can be utilized by the whole industry of house building.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University
Contributors: Kantola, M., Saari, A.
Number of pages: 12
Pages: 312-323
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 32
Issue number: 7-8
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2014): CiteScore 1.1 SJR 0.536 SNIP 1.259
Original language: English
ASJC Scopus subject areas: Architecture , Building and Construction, Human Factors and Ergonomics
Keywords: Contracting, Energy efficiency, Indoor environment, Procurement, Zero-energy building
Source: Scopus
Source ID: 84940280901

Research output: Contribution to journalArticleScientificpeer-review

Environmental and social sustainability–emergence of well-being in the built environment, assessment tools and real estate market implications

Well-being has emerged as the new ‘green’ for buildings thought to reward occupiers, property owners, developers and other concerned actors. The new assessment tools for well-being are seen as the next step of currently widely used ‘traditional’ sustainability tools. However, a lack of knowledge globally about these tools, their compatibility and general adoption in the market due to the newness of the topic inspired this study. In the research, we aim at developing a deeper understanding of the well-being and social sustainability perspective as an innovation in relation to the built environment. The study consists of a literature review, a desktop study of sustainability and well-being rating tools and a qualitative interview data-based research on stakeholders’ position regarding the WELL-certificate adoption in the market. Lastly, the conclusions are drawn based on the results of empirical and desktop study. The results of this research benefit the scientific community by providing a better understanding of the well-being approach in the market and points out the areas of interest for further research. Practitioners can benefit from a deeper understanding of market adoption of well-being assessment tools and the development of sustainability concept in the built environment.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Responsible Construction, Aalto University, University of Melbourne, Finnish University Properties, Ltd
Contributors: Danivska, V., Heywood, C., Christersson, M., Zhang, E., Nenonen, S.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Intelligent Buildings International
ISSN (Print): 1750-8975
Original language: English
ASJC Scopus subject areas: Building and Construction, Computer Science Applications
Keywords: assessment tools, building certification, Health and well-being, market acceptance, social sustainability

Bibliographical note

EXT="Danivska, Vitalija"

Source: Scopus
Source ID: 85074504857

Research output: Contribution to journalArticleScientificpeer-review

Evaluating retrofit options in a historical city center: Relevance of bio-based insulation and the need to consider complex urban form in decision-making

Historical dwellings make up a significant fraction of the French building stock and require substantial retrofitting to reduce their energy consumption and improve their thermal comfort. In the city center of Cahors, France, the old medieval dwellings are considered as valuable cultural heritage and internal insulation is often the only insulation technique that can be used when the architectural value of the exterior façade is to be preserved. However, internal insulation may have an impact upon the hygrothermal performance of the wall, leading to lowered drying capacity, with possible interstitial condensation and mold growth. Hygrothermal models may be used to assess the risk of failure, but the accuracy of the results depends on how reliable the input data is, including external boundary conditions, which may vary significantly in dense medieval cities such as Cahors. In this study, a Geographical Information System model of Cahors is used to develop EnergyPlus models of individual dwellings. The boundary conditions output by these models are, in turn, used to model the hygrothermal performance of façades with different internal insulations, using the hygrothermal tool Delphin. The Delphin outputs are then analyzed with the VTT model, a mold growth assessment model. Results highlight a quantitative correlation between some urban morphology characteristics and the hygrothermal performance of refurbished walls, with some configurations raising the risk of damage patterns. We find that bio-based insulation presents a better hygrothermal performance than mineral wool in most of the configurations.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University of Toulouse, INP, LAAS-CNRS, University College London
Contributors: Claude, S., Ginestet, S., Bonhomme, M., Escadeillas, G., Taylor, J., Marincioni, V., Korolija, I., Altamirano, H.
Number of pages: 9
Pages: 196-204
Publication date: 1 Jan 2019
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 182
ISSN (Print): 0378-7788
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Source: Scopus
Source ID: 85055886229

Research output: Contribution to journalArticleScientificpeer-review

Evaluation of a carbonation model for existing concrete facades and balconies by consecutive field measurements

The square root model is widely used to predict the initiation phase of reinforcement corrosion induced by carbonation of the concrete cover. The model is based on diffusion laws which makes its validity arguable. The model has been accused of not being able to model accurately carbonation in structures exposed to drying/wetting cycles. The model was evaluated by field measurements on 18 existing concrete buildings conducted twice at an average interval of 8 years. Data from individual parallel samples as well as averaged measurement data were produced. The propagation of carbonation over a certain period of time and variation in the carbonation coefficient were studied using the data. Individual measurements indicated high variation and even inconsistency in carbonation depth. Thus, the carbonation coefficient calculated for the square root model also varied widely. Despite the high scatter, the averaged carbonation of many buildings was found to be closely in line with the prediction of the square root model.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Engineering Office Lauri Mehto Oy
Contributors: Köliö, A., Niemelä, P. J., Lahdensivu, J.
Number of pages: 12
Pages: 29-40
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Cement and Concrete Composites
Volume: 65
ISSN (Print): 0958-9465
Ratings: 
  • Scopus rating (2015): CiteScore 4.23 SJR 2.848 SNIP 2.741
Original language: English
ASJC Scopus subject areas: Materials Science(all), Building and Construction
Keywords: Carbonation, Concrete, Corrosion, Field measurement, Modelling, Service life
Source: Scopus
Source ID: 84945434731

Research output: Contribution to journalArticleScientificpeer-review

Facilities management research in Finland - state-of-art about current Finnish PhD-projects

Purpose: The goal of this paper is to present a description of ongoing PhD-projects as a part of facilities management (FM) research in Finland. Design/methodology/approach: The empirical evidence is collected from PhD-research projects, the facilities management research sector in Finland. The aim is to identify and analyze: drivers for the research; dominant research themes; theories; research methods. Findings: The Finnish research in facilities management began already in the beginning of 1990s at Helsinki University of Technology (nowadays Aalto-University). The research followed the embryonic phase of development of facilities management as a profession. At first the research was focusing on the facility services, e.g. problems related to outsourcing, contracting-out,co-operations. Nowadays, the research focus is wider and more scattered as a topic and methods wise. Research limitations/implications: The paper describes the situation only in one Finnish university in Finland excluding the research projects, which do not aim to doctoral degrees. Practical implications: The focus is on research, but the reflections to the development of the industry as well as to the affordance in the education can be made. The results offer material for the future research agenda and also for collaborative and comparative research initiatives. Originality/value: This paper provides important input to the European FM research by describing the current PhD research initiatives in Finland. The overview is useful in the discussion of topics for FM research, relevance and implications for practice, and the development of FM as an academic field.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), School of Engineering, Built Environment Services Research Group (BES), Aalto University
Contributors: Nenonen, S., Sarasoja, A. L.
Number of pages: 9
Pages: 58-66
Publication date: Jan 2014
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 32
Issue number: 1-2
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2014): CiteScore 1.1 SJR 0.536 SNIP 1.259
Original language: English
ASJC Scopus subject areas: Architecture , Building and Construction, Human Factors and Ergonomics
Keywords: Facilities management, Finland, Research
Source: Scopus
Source ID: 84893479324

Research output: Contribution to journalArticleScientificpeer-review

Factors affecting service innovations in FM service sector

Purpose: The purpose is to clarify the concept of service innovation in the context of FM service and to map the factors that are critical for service innovations in the FM service sector. The research questions are: how can service innovations be classified in the FM service sector and what are the factors that create requirements and barriers to the service innovations in the FM service sector? Design/methodology/approach: The nature of this study is qualitative. The data were gathered from two specialist workshops and from semi-structured interviews. The people interviewed worked for the largest service provider companies in Finland and their customers. Findings: Results yielded by this study comprise the classification of service innovations and the factors that create requirements and barriers for the service innovations in the FM service sector. Research limitations/implications: This study focuses on examining the innovation process and its development and on developing innovation activity in large-scale service provider companies in Finland. Practical implications: This study promotes innovation activity in the FM service sector. It helps a service provider to minimize the barriers of service innovation and maximize the related requirements. Originality/value: This study promotes innovation activity in the FM service sector. It helps a service provider to minimize the barriers of service innovation and maximize the related requirements.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Aalto University
Contributors: Sillanpää, E., Junnonen, J. M.
Number of pages: 14
Pages: 517-530
Publication date: 1 Aug 2012
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 30
Issue number: 11
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2012): CiteScore 0.62 SJR 0.444 SNIP 0.93
Original language: English
ASJC Scopus subject areas: Human Factors and Ergonomics, Architecture , Building and Construction
Keywords: Allocation, Customer service management, Facility management services, Finland, Management services, Requirements and barriers, Service innovations
Source: Scopus
Source ID: 84865127036

Research output: Contribution to journalArticleScientificpeer-review

From walls to experience – servitization of workplaces

Purpose: New ways of working challenge workplace management: increasing mobility and diminishing organizational boundaries require re-evaluation of both workplace design and service delivery. However, structures and processes of workplace management are still traditional, and managers, together with outsourced facility service providers, often do not succeed at fulfilling the needs of mobile employees. The aforementioned changes stimulate discussions in many areas in both industry and academy. Nevertheless, workplace literature from business perspective seems to be scarce. In this paper, the focus is on workplace service offering for mobile knowledge workers. This paper aims to study the current state of workplace servitization. To answer this, the authors identify value offering elements that are used in office business market to deliver workplace as a service. Design/methodology/approach: This study follows multiple case study methodology including five case studies. Primary data were collected through interviews with workplace service providers. Secondary data included observations and publicly available data. The authors took business model design approach to study selected business offerings. Findings: The results indicate that workplace business models include elements of servitization on various levels. Physical space is no longer the central offering in the office business; instead, it acts as a component on which the service portfolio is built. The highest value from workplace comes from experience-related service offerings. Originality/value: Academically, research contributes to the workplace management studies by providing servitization perspective to a topic previously approached with a more technical and psychological point of view. This study can also support service providers and customer organizations in their quest to make service provision more flexible and experience-oriented.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Department of Built Environment, Aalto University, Delft University of Technology
Contributors: Petrulaitiene, V., Korba, P., Nenonen, S., Jylhä, T., Junnila, S.
Number of pages: 20
Pages: 525-544
Publication date: 2 Jul 2018
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 36
Issue number: 9-10
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2018): CiteScore 1.47 SJR 0.517 SNIP 0.89
Original language: English
ASJC Scopus subject areas: Human Factors and Ergonomics, Architecture , Building and Construction
Keywords: Business models, Facilities management services, Mobile work, Services, Servitization, Workplace

Bibliographical note

EXT="Petrulaitiene, Vitalija"

Source: Scopus
Source ID: 85052158290

Research output: Contribution to journalArticleScientificpeer-review

Identifying and managing risks involved in the transition to the EU nZEB decree

Purpose – The purpose of this paper is to identify the risks and challenges related to the change in building construction projects to the European Union (EU) zero-energy building (nZEB) decree in the year 2020. Another goal was to create solutions to those risks and challenges. Design/methodology/approach – A workshop method was chosen to gather up-to-date information from the construction cluster in Finland. Findings – In the workshop, the main concern was the level of knowledge and know-how with all the parties working with construction projects. As an answer to this challenge, serious and substantial education in the organisations and competence requirements for designers and piloting as much as possible in the next few years was offered. Commissioning consultant was also seen as vital for nZEB project. Tight schedules and unfit project delivery systems were also seen as a risk for nZEB projects. However, modern project delivery systems were seen to be problematic in practice even if they were functional in theory. Originality/value – The results of the workshop are valuable for all parties working with building construction projects in Finland and the whole EU area.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Aalto University
Contributors: Kantola, M., Saari, A.
Number of pages: 11
Pages: 339-349
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 34
Issue number: 5-6
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2016): CiteScore 1.06 SJR 0.485 SNIP 1.148
Original language: English
ASJC Scopus subject areas: Human Factors and Ergonomics, Architecture , Building and Construction
Keywords: Building maintenance, Building management, Building services, Construction management, Energy consumption, Risk management
Source: Scopus
Source ID: 84971654724

Research output: Contribution to journalArticleScientificpeer-review

Impact of building usage and occupancy on energy consumption in Finnish daycare and school buildings

The facility strategy of the City of Espoo emphasises improvements in the energy efficiency and efficient use of buildings. The design phase of a building is crucial and when the building is in operation, it is crucial to use control systems correctly. Further, in order to encourage relevant efficiency efforts, it is essential to know how to measure energy efficiency in the building operation phase. This requires an understanding of the correlation between building occupancy, space efficiency and energy efficiency. Energy efficiency is typically measured as energy consumption per unit of area kWh/m2 per annum. The specific energy consumption is an effective way to measure the technical properties of a building and to guide its design but it neglects issues related to building occupancy and space efficiency. This paper explores ways in which building usage and occupancy influences the measured energy consumption in Finnish daycare centres and school buildings. The study adopts existing energy efficiency indicators and introduces a new indicator for building energy efficiency which takes into account both space and occupancy efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), VTT Technical Research Centre of Finland, Aalto University, School of Engineering, Aalto University
Contributors: Sekki, T., Airaksinen, M., Saari, A.
Number of pages: 11
Pages: 247-257
Publication date: 18 Aug 2015
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 105
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2015): CiteScore 4.07 SJR 2.04 SNIP 2.144
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Building usage, Daycare centres, Energy efficiency indicators, Measured energy consumption, Schools
Source: Scopus
Source ID: 84939449749

Research output: Contribution to journalArticleScientificpeer-review

Impacts of energy efficiency retrofitting measures on indoor PM2.5 concentrations across different income groups in England: a modelling study

As part of an effort to reduce carbon emissions in the UK, policies encouraging the energy-efficient retrofit of domestic properties are being implemented. Typical retrofits, including installation of insulation and double glazing can cause tightening of the building envelope which may affect indoor air quality (IAQ) impacting occupant health. Using the example of PM2.5 (an airborne pollutant with known health impacts), this study considers the influence of energy-efficient retrofits on indoor PM2.5 concentrations in domestic properties both above and below the low-income threshold (LIT) for a range of tenancies across England. Simulations using EnergyPlus and its integrated Generic Contaminant model are employed to predict indoor PM2.5 exposures from both indoor and outdoor sources in building archetypes representative of (i) the existing housing stock and (ii) a retrofitted English housing stock. The exposures of occupants for buildings occupied by groups above and below the LIT are then estimated under current conditions and following retrofits. One-way ANOVA tests were applied to clarify results and investigate differences between the various income and tenure groups. Results indicate that all tenures below the LIT experience greater indoor PM2.5 concentrations than those above, suggesting possible social inequalities driven by housing, leading to consequences for health.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London
Contributors: Shrubsole, C., Taylor, J., Das, P., Hamilton, I. G., Oikonomou, E., Davies, M.
Number of pages: 15
Pages: 69-83
Publication date: 2 Jan 2016
Peer-reviewed: Yes

Publication information

Journal: ADVANCES IN BUILDING ENERGY RESEARCH
Volume: 10
Issue number: 1
ISSN (Print): 1751-2549
Ratings: 
  • Scopus rating (2016): CiteScore 1.7 SJR 0.864 SNIP 0.607
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: low-income housing, low-income threshold, PM, retrofit, unintended consequences
Source: Scopus
Source ID: 84923583641

Research output: Contribution to journalArticleScientificpeer-review

Improving the thermal performance of concrete-sandwich envelopes in relation to the moisture behaviour of building structures in boreal conditions

The excellent thermal performance and low cost of concrete-sandwich walls have made them widely applied in residential buildings. However, their standard composition may require additional insulation in boreal and arctic climates, where improvements in thermal insulation are achieved mainly by applying additional insulation layers on the envelope surface. Although thick insulation will substantially improve the heat capacity of a structure, elevated temperatures and entrapped humidity can lead to favourable conditions for the initiation of mould growth. The present study simulates the thermal performance of a model house wall structure in relation to increased mould growth risk. The results indicate that added insulation may have a negative impact not only on the structure and material properties of structural elements, but also on the environmental health and comfort of residents. Furthermore, climate conditions are shown to be a significant factor in identifying an optimal insulation design based on thermal performance and structural health.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), University of Oulu, Structural Engineering and Construction Technology, Ita-Suomen yliopisto
Contributors: Fedorik, F., Malaska, M., Hannila, R., Haapala, A.
Number of pages: 8
Pages: 226-233
Publication date: 15 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 107
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2015): CiteScore 4.07 SJR 2.04 SNIP 2.144
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Concrete sandwich, Energy efficiency, Heat and mass transfer, Mould growth, Renovation building, Structural health
Source: Scopus
Source ID: 84953403315

Research output: Contribution to journalArticleScientificpeer-review

Indoor overheating and mitigation of converted lofts in London, UK

In the UK, there has been an increase in the number of loft conversions, driven by demands for increased floor areas of dwellings to accommodate more individuals or increase property values. While rooms directly underneath roofs are known to have increased overheating risks, there is little research available that quantifies this risk, and how to mitigate it cost-effectively. This paper seeks to evaluate overheating risks in loft conversions, using integrated environmental solutions virtual environment to dynamically simulate indoor temperatures in a semi-detached dwelling in London, UK, under current and future (2050s and 2080s medium and high emissions) climate scenarios. Adaptive overheating risk and energy consumption are calculated with and without passive overheating adaptations that reduce solar gains, increase ventilation, or add thermal insulation. Marginal abatement cost curves (MACC) are then used to select the most cost-effective adaptations based on installation and ongoing energy consumption costs. Results estimate 11,340–12,210 more summertime Category I overheating degree-hours for the loft than conventional bedrooms in the dwelling under the current climate; total category I loft overheating degree-hours may increase to 20,319 by 2080. While external shutters and night-purge ventilation were the most effective at reducing overheating degree-hours (96% and 89%, respectively), the most cost-effective solutions considering capital and ongoing costs are ventilation strategies, including night-time purge ventilation, advance ventilation and cross ventilation. Passive adaptations are not capable of eliminating overheating entirely, and by the 2080s active cooling is likely to be required to maintain comfortable indoor conditions in lofts. Practical application: Converted lofts – present in 5.8% of English and 10.8% of London dwellings – are at significantly elevated risk of high indoor temperatures relative to conventional rooms. Passive adaptations such as ventilation and shading can effectively mitigate loft overheating until around 2080, after which active measures become necessary. When capital and ongoing costs are considered, the most cost-effective heat mitigating adaptations are night and advance ventilation and internal curtains/blinds. Heat mitigating adaptations for converted lofts should become mandatory, and such spaces should not be occupied by the vulnerable or elderly during hot weather.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London
Contributors: Li, X., Taylor, J., Symonds, P.
Number of pages: 17
Pages: 409-425
Publication date: 1 Jul 2019
Peer-reviewed: Yes

Publication information

Journal: Building Services Engineering Research and Technology
Volume: 40
Issue number: 4
ISSN (Print): 0143-6244
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: building simulation, loft conversions, marginal abatement cost curves, Overheating
Source: Scopus
Source ID: 85063994820

Research output: Contribution to journalArticleScientificpeer-review

Initial axial stiffness of welded RHS T joints

Recently, CIDECT (International Committee for the Development and Study of Tubular Structures) has proposed the component method as a unified approach for the design of many types of connections, including welded tubular joints. Although CIDECT provides clear and simple equations for the resistance of welded tubular joints, the design of initial stiffness remains complicated and includes a number of uncertainties. This paper analyzes the theoretical approach for the initial axial stiffness of rectangular hollow section T joints. The validation against experimental data has shown that the component method considerably overestimates the stiffness of T joints. The paper develops new equations for the stiffness of the components “chord face in bending” and “chord side walls in compression”. The equations are based on simplified mechanical models, employing finite element analyses to calculate the parameters for which analytical solutions are found extremely complicated. In addition, the article numerically investigates the effect of chord axial stresses on the axial stiffness of joints and proposes a corresponding chord stress function.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Metal and Light-wight structures, St. Petersburg State Polytechnical University, Technische Universitat Munchen
Contributors: Garifullin, M., Bronzova, M., Pajunen, S., Mela, K., Heinisuo, M.
Number of pages: 14
Pages: 459-472
Publication date: 1 Feb 2019
Peer-reviewed: Yes
Early online date: 11 Nov 2018

Publication information

Journal: Journal of Constructional Steel Research
Volume: 153
ISSN (Print): 0143-974X
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanics of Materials, Metals and Alloys
Keywords: Axial stiffness, Component method, Initial stiffness, Rectangular hollow section, Tubular joint
Source: Scopus
Source ID: 85056210825

Research output: Contribution to journalArticleScientificpeer-review

Initial in-plane rotational stiffness of welded RHS T joints with axial force in main member

In the frame analysis, the local analysis model of the joint must follow the behavior of the joint. When completing the elastic global analysis, the initial rotational stiffness of the joints should be known to obtain the reliable moment distribution between the members of the frame. This paper evaluates the existing calculation approach for the initial rotational stiffness of welded rectangular hollow section T joints. Validation with the experiments shows that the current calculation approach significantly underestimates their initial rotational stiffness. Based on the existing experimental data, the paper proposes the improvement for determining the initial stiffness. The second part of the article investigates the effect of the axial force in the main member on the initial rotational stiffness of the joint. The conducted numerical study on square hollow section T joints shows that the reduction of their initial stiffness can reach 50%, when the main member experiences the normal stresses close to yielding. Using the curve fitting approach, the paper proposes and validates a corresponding chord stress function, similar to the existing ones for the moment resistance.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Metal and Light-wight structures, St. Petersburg State Polytechnical University, HAMK University of Applied Sciences
Contributors: Garifullin, M., Pajunen, S., Mela, K., Heinisuo, M., Havula, J.
Number of pages: 10
Pages: 353-362
Publication date: 1 Dec 2017
Peer-reviewed: Yes

Publication information

Journal: Journal of Constructional Steel Research
Volume: 139
ISSN (Print): 0143-974X
Ratings: 
  • Scopus rating (2017): CiteScore 3.13 SJR 1.892 SNIP 2.272
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanics of Materials, Metals and Alloys
Keywords: Chord stress function, In-plane moment load, Rotational stiffness, Welded tubular T joint
URLs: 
Source: Scopus
Source ID: 85030871269

Research output: Contribution to journalArticleScientificpeer-review

Internal moisture excess of residential buildings in Finland

In Finland, the indoor air conditions of 171 single-family buildings and 49 apartments in multi-family buildings have been studied in large research projects in collaboration with Tampere University of Technology and Helsinki University of Technology. This article deals with the results of moisture excess studied in these single-family buildings and apartments. Continuous field measurements up to 28 months enable to include two consecutive heating seasons in the analysis of the internal moisture excess. The higher 10% critical level during the cold period (Te ≤ 5°C) was between 3.4 and 4.9 g/ m3 in Finnish heavyweight and lightweight single-family buildings and between 2.4 and 3.6 g/m3 in apartments of multi-family buildings. During the warm period (Te ≥15°C), the corresponding values were between 0.3 and 2.6 g/m3 for single-family buildings and 0.5 and 1.5 g/m3 for apartments. The number of occupants and the airtightness of different groups of external wall did not have influence on the average values of moisture excess. Slightly better ventilation air change rates were measured in apartments of multi-family buildings, where also the air change rates from supply–exhaust ventilation systems generally fulfilled the Finnish guideline value. The design values of moisture classes in EN ISO 13788:2012 were found difficult to apply for Finnish residential buildings. The upper limit value of humidity class 2 of EN ISO 13788:2012 is suitable for apartments in Finnish multi-family buildings, but too low for Finnish lightweight and heavyweight single-family buildings. Applying the design values of Finnish guidelines would be justified for the studied buildings almost at the full range of outdoor temperatures.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Aalto University
Contributors: Vinha, J., Salminen, M., Salminen, K., Kalamees, T., Kurnitski, J., Kiviste, M.
Number of pages: 20
Pages: 239-258
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Journal of Building Physics
Volume: 42
Issue number: 3
ISSN (Print): 1744-2591
Ratings: 
  • Scopus rating (2018): CiteScore 1.14 SJR 0.436 SNIP 0.791
Original language: English
ASJC Scopus subject areas: Building and Construction, Materials Science(all)
Keywords: Apartments in multi-family buildings, Heavyweight and lightweight (timber-framed) single-family buildings, Moisture excess, Residential buildings, Ventilation

Bibliographical note

EXT="Kalamees, Targo"

Source: Scopus
Source ID: 85056594099

Research output: Contribution to journalArticleScientificpeer-review

Investigating the kinetics and biofuel properties of Alstonia congensis and Ceiba pentandra via torrefaction

Alstonia congensis (Ahun) and Ceiba pentandra (Araba) were chosen as representations of tropical wood in this study. The use of untreated wood for energy recovery could lead to a high loss in efficiency. One way of circumventing this in a developing country such as Nigeria is by exposing the fuel materials to a pre-treatment, such as torrefaction, prior to deployment. Attempts were made to improve the combustion properties of these resources and also to investigate their torrefaction kinetics. Derivations of kinetic parameters using Coats-Redfern method were discontinued due to inconsistent results. A non-linear regression method was then employed and the results compared to the average value obtained by the FWO method, which was considered more viable than the Coats-Redfern method. The kinetic parameters (Ea,A and n) derived by the regression method are 134.45 kJ/mol, 1.83E+13 min−1 and 2.15, respectively, for Araba and 143.38 kJ/mol, 1.90E+10 min−1 and 2.28, respectively, for Ahun. The thermal behaviour of the samples showed that a lower mass yield resulted in a lower energy yield, while the heating values increased with the temperature of torrefaction. The results obtained in this study affirm the possibility of obtaining an optimum conversion of these resources for energy recovery.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy, University of Borås, Laboratory of Chemistry and Bioengineering
Contributors: Oluoti, K., Doddapaneni, T. R. K., Richards, T.
Number of pages: 8
Pages: 134-141
Publication date: 1 May 2018
Peer-reviewed: Yes

Publication information

Journal: Energy
Volume: 150
ISSN (Print): 0360-5442
Ratings: 
  • Scopus rating (2018): CiteScore 6.2 SJR 2.048 SNIP 1.822
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Pollution, Energy(all), Mechanical Engineering, Industrial and Manufacturing Engineering, Electrical and Electronic Engineering
Keywords: Alstonia congensis, Ceiba pentandra, Energy densification, Kinetic parameters, Mini-grid, Torrefaction
Source: Scopus
Source ID: 85042679330

Research output: Contribution to journalArticleScientificpeer-review

Mapping indoor overheating and air pollution risk modification across Great Britain: A modelling study

Housing has long been thought to play a significant role in population exposure to environmental hazards such as high temperatures and air pollution. However, there is sparse data describing how housing may modify heat and air pollution exposure such that housing's role in poor health and mortality from these hazards may be estimated. This paper describes the development of individual-address level indoor overheating and air pollution risk modifiers for Great Britain, for use alongside historical weather, outdoor air pollution, population socio-economic data, and mortality data in a large-scale epidemiological investigation. A geographically-referenced housing stock database was developed using the Homes Energy Efficiency Database (HEED) and the English Housing Survey (EHS). Simulations of unique combinations of building, fabric, occupation, and environment were run using a modelling framework developed for EnergyPlus 8.0, estimating indoor temperature metrics, indoor/outdoor ratio of pollution from outdoor sources, and indoor air pollution from multiple indoor sources. Results were compiled, matched back to individual properties in HEED, and mapped using Geographical Information Systems (GIS). Results indicate urban areas had higher numbers of buildings prone to overheating, reduced levels indoor air pollution from outdoor sources, and higher air pollution from indoor sources relative to rural areas, driven largely by variations in building types. The results provide the first national-scale quantitative estimate of heat and indoor air pollution modification by dwellings, aggregated at levels suitable for inclusion in health analysis.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, University of Oxford, University of Nottingham
Contributors: Taylor, J., Davies, M., Mavrogianni, A., Shrubsole, C., Hamilton, I., Das, P., Jones, B., Oikonomou, E., Biddulph, P.
Number of pages: 12
Pages: 1-12
Publication date: 1 Apr 2016
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 99
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2016): CiteScore 4.51 SJR 1.998 SNIP 2.227
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: Building physics, Building stock modelling, IAQ, Overheating
Source: Scopus
Source ID: 84955098873

Research output: Contribution to journalArticleScientificpeer-review

Measured energy consumption of educational buildings in a Finnish city

This study measures energy consumption in existing educational buildings. The study provides an overall picture of energy consumption and assesses the factors that are used in evaluating measured energy. The studied buildings are day care centres, schools and university buildings located in southern Finland. The energy efficiency requirements in Finnish building regulations have become significantly stricter in recent years. This study shows that in different educational building type, the newer buildings consume less heating. However, such a clear correlation not found for electricity consumption. In the day care centres and school buildings studied, the primary heating consumption as a function of the age of the buildings has a decreasing trend. In turn, the primary electricity consumption has a slightly rising trend. However, in different building types, the primary heating and electricity consumption varied significantly between the buildings e.g. in day care centres variation was 83%, in schools 84% and in university buildings 76%. This study shows that even though Finnish climate is cold the primary electricity consumption is higher than primary heating in educational buildings constructed in the 2000s. This means that in the design phase, there is a need to find ways to influence the electricity consumption in particular.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), VTT Technical Research Centre of Finland, Aalto University
Contributors: Sekki, T., Airaksinen, M., Saari, A.
Number of pages: 11
Pages: 105-115
Publication date: 1 Jan 2015
Peer-reviewed: Yes

Publication information

Journal: Energy and Buildings
Volume: 87
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2015): CiteScore 4.07 SJR 2.04 SNIP 2.144
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanical Engineering, Electrical and Electronic Engineering
Keywords: Educational buildings, Energy consumption, Measured energy, Primary energy consumption
Source: Scopus
Source ID: 84911913165

Research output: Contribution to journalArticleScientificpeer-review

Modelling the stressed skin effect by using shell elements with meta-material model

It is a well-known fact that the so-called stressed skin design results in ca. 10-20 % mass and cost savings in a typical steel hall structures. The potential of this design method is however, too often disregarded due to e.g. rather complex and limited existing design rules and instructions. In this paper, a method for determination of generalized elastic parameters is proposed, so that the stressed skin can be modelled in the general finite element software using existing elements and material parameters. With the proposed method, structural designer can take advantage of the stressed skin design in the context of basic design tools as Autodesk Robot or RFEM.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Sorvimo Optimointipalvelut Oy
Contributors: Pajunen, S., Hautala, J., Heinisuo, M.
Number of pages: 10
Pages: 20-29
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Magazine of Civil Engineering
Volume: 86
Issue number: 2
ISSN (Print): 2071-4726
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Corrugated sheet, Diaphragm, Stressed skin
Electronic versions: 

Bibliographical note

EXT="Heinisuo, M."

Source: Scopus
Source ID: 85068566348

Research output: Contribution to journalArticleScientificpeer-review

Organizational culture: Case of the finnish construction industry

Academic literature has long recognized the correlation between a company’s organizational culture and its quality performance. The Finnish construction industry is still a highly human powered industry, and thus, organizational culture is seen to have a significant effect on an organization’s efficiency as well. The aim of this study is to examine and determine organizational cultural profiles of organizations in the Finnish construction industry as they are currently perceived and preferred by professionals themselves. In all, 121 professionals working in organizations in the Finnish construction industry were surveyed using the Organizational Culture Assessment Instrument (OCAI). The reliability of characteristics was tested by calculating Cronbach alpha reliability coefficients, and the found differences between the response characteristics were analysed in-depth with paired and independent t-test analyses. The findings show that, on average, construction industry organizations in Finland currently operate with a mixture of clan and hierarchy cultures. Thus, the current organizational culture stresses the point of view of internal focus and integration. However, the organizations desired to emphasize more flexibility and discretion toward individuals. The novelty value of this paper is presenting existing and preferred culture profiles in the Finnish construction industry. These found profiles have the potential to improve management of organizations, which results in better efficiency of the industry through better performance of organizations in the construction industry.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Mathematics, YIT Corporation
Contributors: Teräväinen, V., Junnonen, J. M., Ali-Löytty, S.
Number of pages: 22
Pages: 48-69
Publication date: 1 Mar 2018
Peer-reviewed: Yes

Publication information

Journal: Construction Economics and Building
Volume: 18
Issue number: 1
ISSN (Print): 2204-9029
Ratings: 
  • Scopus rating (2018): CiteScore 1.45 SJR 0.452 SNIP 1.158
Original language: English
ASJC Scopus subject areas: Building and Construction, Business, Management and Accounting(all)
Keywords: Construction industry, Efficiency, Finland, OCAI, Organizational culture
Electronic versions: 

Bibliographical note

EXT="Teräväinen, Ville"

Source: Scopus
Source ID: 85044756739

Research output: Contribution to journalArticleScientificpeer-review

Overheating in English dwellings: comparing modelled and monitored large-scale datasets

Monitoring and modelling studies of the indoor environment indicate that there are often discrepancies between simulation results and measurements. The availability of large monitoring datasets of domestic buildings allows for more rigorous validation of the performance of building simulation models derived from limited building information, backed by statistical significance tests and goodness-of-fit metrics. These datasets also offer the opportunity to test modelling assumptions. This paper investigates the performance of domestic housing models using EnergyPlus software to predict maximum daily indoor temperatures over the summer of 2011. Monitored maximum daily indoor temperatures from the English Housing Survey’s (EHS) Energy Follow-Up Survey (EFUS) for 823 nationally representative dwellings are compared against predictions made by EnergyPlus simulations. Due to lack of information on the characteristics of individual dwellings, the models struggle to predict maximum temperatures in individual dwellings and performance was worse on days when the outdoor maximum temperatures were high. This research indicates that unknown factors such as building characteristics, occupant behaviour and local environment makes the validation of models for individual dwellings a challenging task. The models did, however, provide an improved estimate of temperature exposure when aggregated over dwellings within a particular region.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, London School of Hygiene and Tropical Medicine
Contributors: Symonds, P., Taylor, J., Mavrogianni, A., Davies, M., Shrubsole, C., Hamilton, I., Chalabi, Z.
Number of pages: 14
Pages: 195-208
Publication date: 17 Feb 2017
Peer-reviewed: Yes

Publication information

Journal: Building Research and Information
Volume: 45
Issue number: 1-2
ISSN (Print): 0961-3218
Ratings: 
  • Scopus rating (2017): CiteScore 2.97 SJR 1.141 SNIP 1.778
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: building information modelling (BIM), building performance, EnergyPlus, housing stock, occupant behaviour, overheating, simulation, validation
Source: Scopus
Source ID: 84988432242

Research output: Contribution to journalArticleScientificpeer-review

Parametric study on temperature distribution of square hollow section joints

The resistance of a steel joint is one of the most crucial elements of a structure under fire conditions. The aim of the study was to investigate the temperature distribution within the square hollow section (SHS) joints with different geometric parameters under fire conditions. The commercial finite element (FE) software, Abaqus/Standard CAE, was used to simulate the behaviour of the SHS joints. Extensive numerical research was conducted on different joint types (T-, Y-, and K-joints) to examine the influence of the joint configuration on the temperature distribution within the joint. To provide reliable observations, a model was validated against the experimental results. The FE simulation results were compared to the predictions of Eurocode equations. The FE simulation results showed that the simulated temperatures are different from the temperatures determined using the Eurocode method. The β parameter was found to have hardly any influence on the temperature distribution within the joint area, whereas different joint configurations strongly influence the distribution.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Metal and Light-wight structures
Contributors: Bączkiewicz, J., Pajunen, S., Malaska, M., Heinisuo, M.
Number of pages: 9
Pages: 490-498
Publication date: 1 Sep 2019
Peer-reviewed: Yes

Publication information

Journal: Journal of Constructional Steel Research
Volume: 160
ISSN (Print): 0143-974X
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanics of Materials, Metals and Alloys
Keywords: Component method, Hollow section, Parametric study, Steel joint, Temperature distribution
Source: Scopus
Source ID: 85067525966

Research output: Contribution to journalArticleScientificpeer-review

Potential of renewable fuel to reduce diesel exhaust particle emissions

The use of fossil fuels in traffic is a significant source of air pollutants and greenhouse gases in rapidly growing and densely populated cities. Diesel exhaust emissions including particle number concentration and size distribution along with the particles’ chemical composition and NOx were investigated from a Euro 4 passenger car with a comprehensive set of high time-resolution instruments. The emissions were compared with three fuel standards – European diesel (EN590), Indian diesel (BS IV) and Finnish renewable diesel (Neste MY) – over the New European Driving Cycle (NEDC) and the Worldwide harmonized Light vehicles Test Cycle (WLTC). Fuel properties and driving conditions strongly affected exhaust emissions. The exhaust particulate mass emissions for all fuels consisted of BC (81–88%) with some contribution from organics (11–18%) and sulfate (0–3%). As aromatic-free fuel, the MY diesel produced around 20% lower black carbon (BC) emissions compared to the EN590 and 29–40% lower compared to the BS IV. High volatile nanoparticle concentrations at high WLTC speed conditions were observed with the BS IV and EN590 diesel, but not with the sulfur-free MY diesel. These nanoparticles were linked to sulfur-driven nucleation of new particles in cooling dilution of the exhaust. For all the fuels non-volatile nanoparticles in sub-10 nm particle sizes were observed during engine braking, and they were most likely formed from lubricant-oil-originated compounds. With all the fuels, the measured particulate and NOx emissions were significantly higher during the WLTC cycle compared to the NEDC cycle. This study demonstrated that renewable diesel fuels enable mitigations of particulate and climate-warming BC emissions of traffic, and will simultaneously help tackle urban air quality problems.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Physics, Department of Automotive and Mechanical Engineering, Metropolia University of Applied Sciences, Finnish Meteorological Institute, The Energy and Resources Institute India, Neste Oyj
Contributors: Pirjola, L., Kuuluvainen, H., Timonen, H., Saarikoski, S., Teinilä, K., Salo, L., Datta, A., Simonen, P., Karjalainen, P., Kulmala, K., Rönkkö, T.
Publication date: 15 Nov 2019
Peer-reviewed: Yes

Publication information

Journal: Applied Energy
Volume: 254
Article number: 113636
ISSN (Print): 0306-2619
Original language: English
ASJC Scopus subject areas: Building and Construction, Energy(all), Mechanical Engineering, Management, Monitoring, Policy and Law
Keywords: Black carbon, Combustion, New European Driving Cycle, Renewable fuel, Traffic emissions, Worldwide harmonized Light vehicles Test Cycle
Electronic versions: 

Bibliographical note

EXT="Pirjola, Liisa"

Source: Scopus
Source ID: 85070211798

Research output: Contribution to journalArticleScientificpeer-review

Radon, fungal spores and MVOCs reduction in crawl space house: A case study and crawl space development by hygrothermal modelling

In this case study was to investigate how ventilation of the crawl space will influence on concentrations of radon, fungal spores and MVOCs in the crawl space and indoors of detached house. The crawl space pressurisation by exhaust air from indoors was successful to prevent the convective flow of radon from the soil, but it increased microbial growth in the crawl space. After installation of the supply and exhaust ventilation in the crawl-space and in the living space, the concentrations of fungal spores in the crawl space and also entry of radon and MVOCs into a house decreased. A microbiologically safe crawl space was determined with hygrothermal simulation utilizing the Finnish Mould Growth Model and a two year examination period. The optional structures of the crawl space being depressurised with exhaust ventilation included an open base uncovered ground and various air-sealed closed structures. When mould growth of building materials was at medium resistant sensitivity class, mould was not observed during different air change rates in any of the examined structures. Open base uncovered gravel ground is a functional solution of a crawl space, only when there are no organic materials. The air-sealed ground structure is recommended build with concrete + insulation and when air exchange rate (ach) varied from 0.2 to 1 h−1. A concrete ground in the crawl space having ach from 0.2 to 0.6 h−1 is also very effective. XPS insulation and plastic sheet covered ground are not recommendable due to their high mould index.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Ramboll Finland Ltd., Ita-Suomen yliopisto
Contributors: Keskikuru, T., Salo, J., Huttunen, P., Kokotti, H., Hyttinen, M., Halonen, R., Vinha, J.
Number of pages: 10
Pages: 1-10
Publication date: 15 Jun 2018
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 138
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2018): CiteScore 5.6 SJR 1.879 SNIP 2.198
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: Air change, Crawl space, Ground covers, Modelling, Mould growth, Radon
URLs: 

Bibliographical note

INT=rak,"Salo, J."

Source: Scopus
Source ID: 85046008041

Research output: Contribution to journalArticleScientificpeer-review

Recycling lithium mine tailings in the production of low temperature (700–900 °C) ceramics: Effect of ladle slag and sodium compounds on the processing and final properties

This paper deals with the valorization of quartz and felspar rich lithium mine tailings (QFS) in the development of construction materials. Ladle slag was used as green strength increasing agent. Sodium hydroxide and carbonate were used as fluxing agents to allow sintering at 700–900 °C. Of these, sodium hydroxide was found to be the more efficient. The sintered ceramics were characterized by X-ray diffraction, scanning electron microscopy, compressive test, water absorption, apparent density and dilatometry; the results were found to comply with ASTM C62-99 specifications for building brick, and interesting for a sustainable use of resources.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Ceramic materials, Tampere University of Technology, Univ of Oulu
Contributors: Lemougna, P. N., Yliniemi, J., Ismailov, A., Levänen, E., Tanskanen, P., Kinnunen, P., Roning, J., Illikainen, M.
Number of pages: 13
Pages: 332-344
Publication date: 10 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Construction and building materials
Volume: 221
ISSN (Print): 0950-0618
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Materials Science(all)
Keywords: Building applications, Ceramic, Fluxing agent, Ladle slag, Lithium mine tailings, Sodium compounds
Source: Scopus
Source ID: 85067302331

Research output: Contribution to journalArticleScientificpeer-review

Re-engineering of the meal logistics in a sheltered house for elderly people

Purpose - The goal of this study is to perform an economic comparison of alternative service concepts designed to improve the productivity of nursing care in a refurbishment project of selected sheltered housing facility. Design/methodology/approach - Four different service development options were identified for the dining and kitchen facilities: the dining facilities were either decentralised or centralised, and the meals were prepared on site or brought in from outside. Findings - The form of dining model chosen affected the operating costs more than the spatial costs. The biggest differences in operating costs were attributable to the meal price and to the costs of transferring disabled residents to the dining area. The study showed that the option which had the lowest spatial costs surprisingly had the highest total costs. This was the option in which the meals were conveyed to the decentralised dining rooms located on the different floors by the food supplier. The total costs of this option were 50 per cent higher than the total costs of the decentralised option with on-site cooking facilities. The centralised dining option with externalised food service had considerably lower renovation costs but 15 per cent higher total costs than the lowest cost option (decentralised dining option with own kitchen). Originality/value - The paper provides a practical model for taking into account not only remodelling costs but also operating costs in total cost calculations of the remodelling process.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Aalto University
Contributors: Aalto, L., Saari, A.
Number of pages: 18
Pages: 120-137
Publication date: 2009
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 27
Issue number: 3-4
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2009): SJR 0.435 SNIP 0.895
Original language: English
ASJC Scopus subject areas: Building and Construction, Architecture , Human Factors and Ergonomics
Keywords: Elder care, Elderly people, Housing, Operating costs
Source: Scopus
Source ID: 70350050566

Research output: Contribution to journalArticleScientificpeer-review

Relationships between organisational culture and efficiency in Finnish construction projects

The construction industry has struggled with efficiency issues for the last two decades, and longer. Organisational culture is identified to contain a lot of potential for developing the industry’s effectiveness. This study was conducted in the Finnish construction industry, where 30 case projects were measured for their culture and performance to investigate the presumptive correlation between construction project culture and efficiency. The projects’ culture was measured with the Organisational Culture Assessment Instrument. The projects with the highest performance and customer satisfaction levels seemed to identify their project culture stronger than poorer level projects. This is congruent with the academic observations that a strong comprehensive culture supports better efficiency outcomes. The article revealed that construction sites would embrace a Clan typology at the expense of a Market typology to achieve a better level of site efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, YIT Construction Ltd, YIT Corporation
Contributors: Teräväinen, V., Junnonen, J., Salopää, T., Sobolev, A.
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: International Journal of Construction Management
ISSN (Print): 1562-3599
Ratings: 
  • Scopus rating (2018): CiteScore 2.26 SJR 0.581 SNIP 0.921
Original language: English
ASJC Scopus subject areas: Building and Construction, Strategy and Management, Management of Technology and Innovation
Keywords: construction, efficiency, Finland, OCAI, Organisational culture, performance, quality
Source: Scopus
Source ID: 85055986652

Research output: Contribution to journalArticleScientificpeer-review

Role and nature of systemic innovations in construction and real estate sector

Purpose - The paper aims to clarify the role of systemic innovations and the subsequent profound change these can have on the construction and real estate sectors. Systemic innovation as a concept has an inherent capability for viewing factors, actors and conditions as a system or several systems. This has a direct relevance in construction and real estate sector where operations are composed of temporary and continual networks of stakeholders and where the end products can be understood as systems. Design/methodology/approach - The paper builds additional viewpoints and interpretations on some recently completed research where sector wide innovation aspects and challenges have been studied. Two doctoral dissertations supervised by the author and an action research effort where innovative cellular building products were developed and implemented are presented. Findings - The paper provides insights about systemic innovations in the construction and real estate sectors. It presents research topics that explain further what is required for having successful systemic innovations. Research limitations/implications - This is a synthesis paper. The presented viewpoints and interpretations can be used as starting points for research, development and innovation actions. Practical implications - The paper presents starting points for companies and other service providers targeting new innovative products which have systemic implications. Originality/value - This paper explains the need and challenges of systemic innovations in the construction and real estate sectors.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Kähkönen, K.
Number of pages: 4
Pages: 130-133
Publication date: 7 Apr 2015
Peer-reviewed: Yes

Publication information

Journal: Construction Innovation: Information, Process, Management
Volume: 15
Issue number: 2
ISSN (Print): 1471-4175
Ratings: 
  • Scopus rating (2015): CiteScore 0.97 SJR 0.443 SNIP 0.745
Original language: English
ASJC Scopus subject areas: Computer Science(all), Control and Systems Engineering, Civil and Structural Engineering, Building and Construction, Architecture
Keywords: Cellular building products, Construction sector, Industry transformation, Innovation, Real estate, Systemic innovation
Source: Scopus
Source ID: 84928793747

Research output: Contribution to journalArticleScientificpeer-review

Schedule health assessment of construction projects

Several factors can contribute to the success of construction projects. A sound and good quality construction schedule is considered to be one of them. The quality of schedules has been a research topic only for a few efforts and amongst them construction-oriented research is even more rare. Methodical grounds for assessing schedule quality have been studied via literature study for the development of appropriate solutions to assess the quality of construction schedules. These findings combined with the experiences from practical implementations have resulted in the definition of a metric to measure schedule quality for construction projects. It includes 75 schedule requirements classified into 5 groups: general requirements, construction process, schedule mechanics, cost and resources and control process. This structure forms a core for the developed method to assess construction schedule quality termed as Schedule Health Assessment. The developed method has also the purpose of assisting project planners to produce and maintain good quality schedules starting from the project initiation until its completion, as via using the method to detect deficiencies of project schedules and other critical issues having importance with respect to schedule maintenance.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering
Contributors: Bragadin, M., Kähkönen, K.
Number of pages: 23
Pages: 875-897
Publication date: 12 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: Construction Management and Economics
Volume: 34
Issue number: 12
ISSN (Print): 0144-6193
Ratings: 
  • Scopus rating (2016): CiteScore 1.59 SJR 0.866 SNIP 1.079
Original language: English
ASJC Scopus subject areas: Building and Construction, Management Information Systems, Industrial and Manufacturing Engineering
Keywords: Critical path method, project control, quality, scheduling

Bibliographical note

EXT="Bragadin, Marco"

Source: Scopus
Source ID: 84978173674

Research output: Contribution to journalArticleScientificpeer-review

Simulation of pollution transport in buildings: The importance of taking into account dynamic thermal effects

The recent introduction of the Generic Contaminant Model in EnergyPlus allows for the integrated modelling of multizone contaminant and dynamic thermal behaviour within a single simulation package. This article demonstrates how dynamic thermal simulation can modify pollutant transport within a building. PM2.5 infiltration from the external to internal environment under dynamic thermal conditions is compared in CONTAM, EnergyPlus 8.0, and Polluto, an in-house pollutant transport model developed in EnergyPlus 3.1. The influence of internal temperature on indoor PM2.5 levels is investigated by comparing results from standard CONTAM simulations and dynamic thermal EnergyPlus 8 simulations. Circumstances where the predictions of such models can diverge are identified.

Practical application:This technical note compares the performance of a new indoor air quality model in EnergyPlus, an EnergyPlus in-house model (Polluto), and an established model (CONTAM). The work then compares the results of indoor air quality models under static and dynamic internal temperature conditions, and demonstrates how predicted indoor pollution levels may deviate significantly if an inappropriate indoor temperature is used. Practically, the work provides confidence in the new models, as well as demonstrating the importance of having a good understanding of the thermal behaviour of a building when modelling indoor air quality.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, University of Nottingham
Contributors: Taylor, J., Shrubsole, C., Biddulph, P., Jones, B., Das, P., Davies, M.
Number of pages: 9
Pages: 682-690
Publication date: 11 Nov 2014
Peer-reviewed: Yes

Publication information

Journal: Building Services Engineering Research and Technology
Volume: 35
Issue number: 6
ISSN (Print): 0143-6244
Ratings: 
  • Scopus rating (2014): CiteScore 0.99 SJR 0.578 SNIP 0.901
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: CONTAM, EnergyPlus, Indoor air, Polluto
Source: Scopus
Source ID: 84908878914

Research output: Contribution to journalArticleScientificpeer-review

Strategy formation in construction firms

The aim of the present paper was to examine strategy formation in construction firms. Strategic thinking has become increasingly important because the environment of construction has changed dramatically in recent years. An organizational strategy is the result of a formation process over time and an organization uses strategy when dealing with a changing environment. Therefore, strategies are formed in an iterative process of social interactions involving various activities. The basic unit of analysis strategy must be a distinct business and corporate entity. Corporate strategy should grow out of a deep understanding of how construction firms prosper in individual business areas, i.e. ‘the parenting advantage’. Parenting advantage is a criterion for guiding corporate strategy formation. Business strategy is formed by accepted common thinking and on the basis of business strategy in general. Business strategy and competitive advantage is based on the competencies and resources of firms.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Responsible Construction, Helsinki University of Technology
Contributors: Junnonen, J. M.
Number of pages: 8
Pages: 107-114
Publication date: 1 Feb 1998
Peer-reviewed: Yes

Publication information

Journal: ENGINEERING, CONSTRUCTION AND ARCHITECTURAL MANAGEMENT
Volume: 5
Issue number: 2
ISSN (Print): 0969-9988
Original language: English
ASJC Scopus subject areas: Architecture , Civil and Structural Engineering, Building and Construction, Business, Management and Accounting(all)
Keywords: Business strategy, Construction firm, Corporate strategy, Forma-tion
Source: Scopus
Source ID: 84992969917

Research output: Contribution to journalArticleScientificpeer-review

Techno-economic evaluation of integrating torrefaction with anaerobic digestion

In recent days, the interest on torrefaction is increasing owing to its ability to improve biomass properties to a level of competing with coal. However, its techno-economic feasibility still need to be optimized. Integrating torrefaction with other thermochemical and biochemical processes could be a feasible option to improve the performance of the torrefaction process. In that regard, this study evaluates the techno-economic feasibility of integrating the torrefaction with anaerobic digestion (AD). In addition, new process configurations were studied to identify the possible heat energy recovery options. Technical feasibility was tested through mass and energy balance at each process unit. The economic indicators such as net present value (€), minimum selling price and internal rate on return (%) were used to evaluate the economic performance. At 10 t/h of torrefied biomass pellets production capacity, the estimated bio-methane production from AD was 369 m3/h. The economic evaluation shows that the minimum selling price of the torrefied biomass to reach the breakeven could be reduced from 199 €/t for standalone torrefaction to 185 €/t in case of torrefaction integrated with AD. The sensitivity analysis shows that feedstock and total capital investment were the most sensitive input parameters. This study shows that integrating the torrefaction with AD has better technical and economic feasibility than standalone torrefaction.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy
Contributors: Doddapaneni, T. R. K. C., Praveenkumar, R., Tolvanen, H., Rintala, J., Konttinen, J.
Number of pages: 13
Pages: 272-284
Publication date: 2018
Peer-reviewed: Yes
Early online date: Jan 2018

Publication information

Journal: Applied Energy
Volume: 213
ISSN (Print): 0306-2619
Ratings: 
  • Scopus rating (2018): CiteScore 9.54 SJR 3.455 SNIP 2.616
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Energy(all), Mechanical Engineering, Management, Monitoring, Policy and Law
Keywords: Energy recovery, Minimum selling price, Process integration, Techno-economic analysis, Torrefaction – anaerobic digestion, Torrefied pellets
Source: Scopus
Source ID: 85041461877

Research output: Contribution to journalArticleScientificpeer-review

The assessment of constructability: BIM cases

The constructability appraisal methods developed so far are based on evaluating and analysing the major design components and systems of an entire building, such as structural systems, materials and production techniques. At first, this paper discusses the current practice of constructability assessment used in Finland and next it introduces an experimental constructability assessment method (ECAM) using building information models (BIM) as a source of constructability information. Interviews of design and construction professionals were used to explore the current practice of constructability assessment. An experimental assessment methodology was developed and tested in case projects. According to the interviews, the main assessment method used was the inspection of drawings, and constructability was assessed occasionally during the design development stage and more systematically at the very end of the detailed design stage with varying professional participants in meetings. Using ECAM in the project level a constructability score of a building and building type can be analysed. When using ECAM on the level of structural elements a constructability score of elements can be measured. These scores incorporate information for the development of constructability. In Finland, the development of a systematic review process of constructability will be needed. The constructability assessment methodology suggested in the article is experimental and is to be developed and tested further before using it reliably in building projects. The assessment combining visual and analytical approach will change present methods for assessing constructability.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University
Contributors: Tauriainen, M. K., Puttonen, J. A., Saari, A. J.
Number of pages: 17
Pages: 51-67
Publication date: 1 Jan 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of Information Technology in Construction
Volume: 20
ISSN (Print): 1403-6835
Ratings: 
  • Scopus rating (2015): CiteScore 1.18 SJR 0.398 SNIP 1.114
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Computer Science Applications
Keywords: Analyses, Assessment, BIM, Buildability, Constructability, Modelling, Quantitative
Source: Scopus
Source ID: 84921652278

Research output: Contribution to journalArticleScientificpeer-review

The corrosion rate in reinforced concrete facades exposed to outdoor environment

Outdoor concrete structures such as concrete facade panels and balcony frame panels are subjected to various environmental actions causing reinforcement corrosion problems. Long-term field measurement data on reinforcement corrosion in carbonated concrete on these structures was utilized in the creation of a corrosion rate regression model combining weather parameters such as temperature, relative humidity, wind-driven rain and solar radiation to corrosion rate. A versatile model capable of predicting the effect of varying environmental actions on the corrosion rates of carbonation induced corrosion was produced. Wind-driven rain was found to have the greatest impact on corrosion rate in tandem with the micro climate surrounding the building. Due to changes in air temperature, air relative humidity as well as in the amount of wind-driven rain and solar radiation, the corrosion rate on concrete facades and balconies is constantly changing. Despite the high seasonal and yearly variation, the average level of the modelled corrosion rate was quite steady on a longer 30-year perspective. This information is substantial for the long term service life design of concrete structures.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Research group: Building Physics, Research area: Structural Engineering, Finnish Meteorological Institute
Contributors: Köliö, A., Pakkala, T. A., Hohti, H., Laukkarinen, A., Lahdensivu, J., Mattila, J., Pentti, M.
Publication date: Feb 2017
Peer-reviewed: Yes
Early online date: 10 Aug 2016

Publication information

Journal: Materials and Structures
Volume: 50
Issue number: 23
ISSN (Print): 1359-5997
Ratings: 
  • Scopus rating (2017): CiteScore 2.45 SJR 1.383 SNIP 1.695
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Materials Science(all), Mechanics of Materials
Keywords: Carbonation, Concrete, Corrosion, Field measurement, Modelling, Reinforcement, Service life design
Source: Scopus
Source ID: 84981736636

Research output: Contribution to journalArticleScientificpeer-review

The effect of steel grade on weight and cost of warren-type welded tubular trusses

The effect of steel grade on the weight and cost of Warren-type welded tubular roof trusses was investigated. For an unbiased comparison, best truss designs were obtained through optimisation. The steel strength investigated ranged from S355 to S960. Costs were calculated based on the features of the trusses. The starting point was the exact geometry of the truss, from which a finite-element model was derived. This approach allowed the resistance and other requirements of design standards of both members and joints to be included as constraints in the optimisation problem. The design variables were the truss height, the locations of joints, the gap width at the joints and the member sections, from a catalogue of cold-formed square tubes. Eurocode 3 requirements were applied. The results of the comparison imply a significant saving in weight when using high-strength steel (HSS), by as much as 50% for S960. The cost reduction was smaller, but still about 20%, for a hybrid solution of S700/S355 for the higher of two investigated load values. It is hoped the results will motivate the use and further investigations of HSSs in building products.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Metal and Light-wight structures
Contributors: Tiainen, T., Mela, K., Jokinen, T., Heinisuo, M.
Number of pages: 19
Pages: 855-873
Publication date: 1 Nov 2017
Peer-reviewed: Yes

Publication information

Journal: Proceedings of the Institution of Civil Engineers: Structures and Buildings
Volume: 170
Issue number: 11
Article number: 1600112
ISSN (Print): 0965-0911
Ratings: 
  • Scopus rating (2017): CiteScore 0.69 SJR 0.41 SNIP 0.66
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Buildings, structures & design, Design methods & aids, Steel structures
Source: Scopus
Source ID: 85032028489

Research output: Contribution to journalArticleScientificpeer-review

The impact of occupancy patterns, occupant-controlled ventilation and shading on indoor overheating risk in domestic environments

It is widely recognised that a major source of uncertainty in building performance simulation relates to occupancy and behavioural assumptions. This paper aims to assess the relative impact of lifestyle patterns, occupant-controlled window opening and shading use on indoor overheating risk levels in dwellings. The indoor thermal environment of a set of broadly representative archetypes of the London housing stock was simulated using dynamic thermal modelling. Two lifestyle patterns and four scenarios of window opening and shading use schedules were combined with multiple other varying parameters (building geometry and orientation, insulation levels, level of overshadowing by adjacent buildings), leading to a total of 27,648 modelled dwelling variants. It was found that the rankings obtained for dwellings occupied by a family with children at school and dwellings occupied by pensioners were broadly similar for all combinations of behaviour and the majority of overheating metrics. Lower ranking correlations were, however, observed between simple temperature-dependent window opening scenarios and a more sophisticated scenario of combined shading and night ventilation. This is an indication that shading and/or night cooling could modify indoor overheating risk significantly. The findings of the study add to a growing body of literature suggesting that the way inhabitants occupy and operate a building has a measurable impact on thermal discomfort and potentially the health risks associated with their exposure to high indoor temperatures. This should be taken into consideration in the design of retrofit interventions and public health strategies aiming to minimise such risks.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, London School of Hygiene and Tropical Medicine, University of Nottingham
Contributors: Mavrogianni, A., Davies, M., Taylor, J., Chalabi, Z., Biddulph, P., Oikonomou, E., Das, P., Jones, B.
Number of pages: 16
Pages: 183-198
Publication date: 1 Jan 2014
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 78
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2014): CiteScore 4.14 SJR 1.887 SNIP 2.742
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: Behaviour, Dwellings, Overheating, Shading, Simulation, Ventilation
Source: Scopus
Source ID: 84901007060

Research output: Contribution to journalArticleScientificpeer-review

The impact of residential development on nearby housing prices

Purpose - Even as multi-story apartment building development proposals in existing neighbourhoods represent a substantial component of policy debate at local planning boards, there is limited evidence for the impact of such residential developments on surrounding apartment values. The void in knowledge is addressed in this study, and the impact of multi-story apartment building developments on apartment values in residential high-rise areas located outside city and district centres is investigated in Helsinki Metropolitan Area, Finland.

Design/methodology/approach - Whether a multi-story apartment building development is followed by an increase in housing values depends on both positive and negative externalities. To specify valuation effects of proximate development projects, advanced research design combining matched sample methodology and hedonic-based difference-in-difference approach is used.
Findings It appears from the analysis that completion of a single multi-story apartment building has an immediate positive impact on apartment values within 300 metre radius. While, there is no statistically significant impact on price trend.

Research limitations - This paper studies apartment values only in Helsinki Metropolitan Area, Finland, and it is important to notice that local regulations and market conditions may have a notable impact on the outcomes.
Originality/value This study is the first of its kind to provide with statistically significant evidence for positive impacts from multi-story apartment building development in Finnish residential high-rise areas, and may have a crucial role in helping to dispel prejudices related to such developments.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Real estate development
Contributors: Kurvinen, A., Vihola, J.
Number of pages: 4
Pages: 671-690
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: International Journal of Housing Markets and Analysis
Volume: 9
Issue number: 4
ISSN (Print): 1753-8270
Ratings: 
  • Scopus rating (2016): CiteScore 0.52 SJR 0.227 SNIP 0.67
Original language: English
ASJC Scopus subject areas: Building and Construction, Economics, Econometrics and Finance (miscellaneous)
Keywords: residential real estate, real estate development, infill development, externalities, residential property values, multi-story apartment buildings

Research output: Contribution to journalArticleScientificpeer-review

The modifying effect of the building envelope on population exposure to PM2.5 from outdoor sources

A number of studies have estimated population exposure to PM2.5 by examining modeled or measured outdoor PM2.5 levels. However, few have taken into account the mediating effects of building characteristics on the ingress of PM2.5 from outdoor sources and its impact on population exposure in the indoor domestic environment. This study describes how building simulation can be used to determine the indoor concentration of outdoor-sourced pollution for different housing typologies and how the results can be mapped using building stock models and Geographical Information Systems software to demonstrate the modifying effect of dwellings on occupant exposure to PM2.5 across London. Building archetypes broadly representative of those in the Greater London Authority were simulated for pollution infiltration using EnergyPlus. In addition, the influence of occupant behavior on indoor levels of PM2.5 from outdoor sources was examined using a temperature-dependent window-opening scenario. Results demonstrate a range of I/O ratios of PM2.5, with detached and semi-detached dwellings most vulnerable to high levels of infiltration. When the results are mapped, central London shows lower I/O ratios of PM2.5 compared with outer London, an apparent inversion of exposure most likely caused by the prevalence of flats rather than detached or semi-detached properties.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, Public Health England, University of Nottingham
Contributors: Taylor, J., Shrubsole, C., Davies, M., Biddulph, P., Das, P., Hamilton, I., Vardoulakis, S., Mavrogianni, A., Jones, B., Oikonomou, E.
Number of pages: 13
Pages: 639-651
Publication date: 1 Dec 2014
Peer-reviewed: Yes

Publication information

Journal: Indoor Air
Volume: 24
Issue number: 6
ISSN (Print): 0905-6947
Ratings: 
  • Scopus rating (2014): CiteScore 4.57 SJR 1.924 SNIP 2.042
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Building and Construction, Public Health, Environmental and Occupational Health
Keywords: Building stock model, EnergyPlus, Geographical information systems, Indoor air quality, PM
Source: Scopus
Source ID: 84910047125

Research output: Contribution to journalArticleScientificpeer-review

The potential of electric trucks – An international commodity-level analysis

Development of battery technology is making battery electric heavy duty trucks technically and commercially viable and several manufacturers have introduced battery electric trucks recently. However, the national and sectoral differences in freight transport operations affect the viability of electric trucks. The aim of this paper is to develop a methodology for estimating the potential of electric trucks and demonstrate the results in Switzerland and Finland. Commodity-level analysis of the continuous road freight survey data were carried out in both countries. As much as 71% of Swiss road freight transport tonne-kilometers may be electrified using battery electric trucks but Finland has very limited potential of 35%, due to the use of long and heavy truck-trailer combinations. Within both countries the electrification potential varies considerably between commodities, although in Finland more so than in Switzerland. Commodities which are constrained by payload volume rather than weight and are to large extent carried using medium duty or <26t rigid trucks trucks seem to provide high potential for electrification even with the current technology. Electric trucks increase the annual electricity consumption by only 1–3%, but truck charging is likely to have a large impact on local grids near logistics centres and rest stations along major roads. A spatial analysis by routing the trips reported in the datasets used in this study should be carried out. Future research should also include comparison between the alternate ways of electrifying road freight transport, i.e. batteries with charging, batteries with battery swapping and electrified road systems.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, HCI e 486.1
Contributors: Liimatainen, H., van Vliet, O., Aplyn, D.
Number of pages: 11
Pages: 804-814
Publication date: 15 Feb 2019
Peer-reviewed: Yes
Early online date: 14 Dec 2018

Publication information

Journal: Applied Energy
Volume: 236
ISSN (Print): 0306-2619
Original language: English
ASJC Scopus subject areas: Building and Construction, Energy(all), Mechanical Engineering, Management, Monitoring, Policy and Law
Keywords: Charging infrastructure, Electric trucks, Logistics, Road freight transport
Electronic versions: 
Source: Scopus
Source ID: 85058374379

Research output: Contribution to journalArticleScientificpeer-review

The relative importance of input weather data for indoor overheating risk assessment in dwellings

The risk of overheating in UK dwellings is predicted to increase due to anthropogenic climate change and local urban climate modification leading to an increased urban heat island effect. Dwelling geometry characteristics such as orientation, aspect, and glazing, and building fabric characteristics such as thermal mass and resistance can influence the risk of overheating. The majority of simulation-based studies have focused on identifying the importance of building characteristics on overheating risk using a small number of weather files, or focus solely on the impact of external temperatures rather than a full set of climatic variables. This study examines the overheating risk in London dwelling archetypes when simulated under different UK climates, both in the present and under 'hot future' conditions, with the objective of identifying whether the conclusions drawn from location-specific studies can be generically applied to different cities. Simulations were carried out using the dynamic thermal simulation tool EnergyPlus using 3456 dwelling variants and six different Design Summer Year (DSY) climate files from locations within the UK. In addition, a 2050 Medium Emissions scenario weather file was used to model a particularly hot summer in all locations. The results indicate that weather files can influence the ranking of relative overheating risk between dwelling types, with significant variations in the relative ranking between London, Scotland and the North of England, and the rest of England. These results show that studies examining the overheating risk across the UK need to consider the variability of building performance under regional weather conditions.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, London School of Hygiene and Tropical Medicine, University of Nottingham
Contributors: Taylor, J., Davies, M., Mavrogianni, A., Chalabi, Z., Biddulph, P., Oikonomou, E., Das, P., Jones, B.
Number of pages: 11
Pages: 81-91
Publication date: 1 Jan 2014
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 76
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2014): CiteScore 4.14 SJR 1.887 SNIP 2.742
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: EnergyPlus, Kendalls Tau, Overheating, Weather files
Source: Scopus
Source ID: 84897417588

Research output: Contribution to journalArticleScientificpeer-review

The role of multi-firm satisfaction in construction project success

Construction project success depends on the multi-firm project organizations involved working together satisfactorily. Yet, satisfaction within multi-firm relationships has rarely been examined as a determinant of construction project success. A pioneering study is carried out to evaluate the extent to which construction project participants' perception of each other's performance reflects on the owner's perception of project success. The data represent 580 performance evaluations carried out among the project owners, project consultants, main contractors and designers. The owner-evaluated performance factors related to the project goals form a dependent variable called Project Success. Dependencies between Project Success and the various performance factors are identified based on Pearson's correlation coefficients. Dependencies were discovered between Project Success and all owner-related relationships and all but one of the non-owner-related relationships. Preliminary sets of discipline-specific and evaluator-specific success factors are identified. The results support the proposition that satisfaction within both owner-related and non-owner-related relationships is reflected on success. Therefore, researchers and practitioners are encouraged to consider project success in terms of multi-firm satisfaction and to engage with multi-firm performance measurement to better understand the heterogeneous performance factors contributing to multi-firm project success.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Responsible Construction, Civil Engineering, Aalto University, School of Engineering, Construction Economics and Management, Tampere University of Applied Sciences
Contributors: Lehtiranta, L., Kärnä, S., Junnonen, J. M., Julin, P.
Number of pages: 13
Pages: 463-475
Publication date: 1 Jun 2012
Peer-reviewed: Yes

Publication information

Journal: Construction Management and Economics
Volume: 30
Issue number: 6
ISSN (Print): 0144-6193
Ratings: 
  • Scopus rating (2012): CiteScore 0.91 SJR 0.711 SNIP 0.91
Original language: English
ASJC Scopus subject areas: Management Information Systems, Building and Construction, Industrial and Manufacturing Engineering
Keywords: Client satisfaction, multi-firm, performance improvement, performance measurement, project success, project team
Source: Scopus
Source ID: 84861885666

Research output: Contribution to journalArticleScientificpeer-review

Towards a framework to evaluate the ‘total’ performance of buildings

Internationally, buildings are a major contributor to carbon emissions. Despite significant advances in the technology and construction of energy-efficient buildings, in many cases a performance gap between designed and actual performance exists. While much research has investigated the drivers of the building energy performance gap – both static and transient– there has been considerably less research into the total performance gap, defined here as performance gaps in building energy use, occupant satisfaction and Indoor Environmental Quality parameters such as thermal comfort and air quality which may impact on occupant health and wellbeing. This paper presents a meta-analysis of building performance data from buildings in the UK and China – selected due to their contrasting development environments – which illustrate the presence of and complexities of evaluating total performance gaps in both countries. The data demonstrate the need for (1) high end-use, spatial granularity and temporal resolution data for both energy and Indoor Environmental Quality, and (2) developing methodologies that allow meaningful comparisons between buildings internationally to facilitate learning from successful building design, construction methodologies and policy environments internationally. Using performance data from a UK building, a potential forward path is illustrated with the objective of developing a framework to evaluate total building performance. Practical application: While much research has examined building energy performance gaps, Indoor Environmental Quality and occupant satisfaction gaps are rarely included despite their relationship to energy. We use a meta-analysis of energy, indoor environmental quality, and occupant satisfaction data from buildings in the UK and China to illustrating the presence of and complexities of evaluating total performance gaps for buildings in the two countries, and the need for high resolution dynamic buildings data and novel methodologies for comparison between buildings across different contexts. Illustrative case studies are used to demonstrate potential future directions for evaluating ‘total’ building performance.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, Tsinghua University
Contributors: Taylor, J., Liu, Y., Lin, B., Burman, E., Hong, S. M., Yu, J., Wang, Z., Mumovic, D., Shrubsole, C., Vermeer, D., Davies, M.
Number of pages: 23
Pages: 609-631
Publication date: 1 Sep 2018
Peer-reviewed: Yes

Publication information

Journal: Building Services Engineering Research and Technology
Volume: 39
Issue number: 5
ISSN (Print): 0143-6244
Ratings: 
  • Scopus rating (2018): CiteScore 1.29 SJR 0.501 SNIP 0.683
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: Building performance gap, buildings energy performance, China, indoor environmental quality, occupant satisfaction, UK
Source: Scopus
Source ID: 85043351882

Research output: Contribution to journalArticleScientificpeer-review

Understanding and mitigating overheating and indoor PM2.5 risks using coupled temperature and indoor air quality models

Indoor temperature and air quality in dwellings are closely coupled. Differences between the indoor temperature and the temperature outside and in adjoining zones can influence airflow due to the stack effect, whilst changes in ventilation can cause changes in indoor pollution and temperature. This paper demonstrates the relationship between an indoor air pollutant, PM2.5, and temperature in UK domestic building archetypes using the dynamic thermal and contaminant modelling capabilities of EnergyPlus 8.0 under various UK Climate Projections 2009 (UKCP09) scenarios (current, current 'hot', 2050 High Emissions and 2050 High Emissions 'hot'), with both internal and external PM2.5 sources. Results indicate that flats have 0.7-0.8 times as much outdoor PM2.5 infiltrating indoors compared to detached dwellings, but 1.8-2.8 times more PM2.5 from indoor sources. During hot periods, temperature-dependent window opening increases exposure to outdoor PM2.5, meaning that as temperatures rises, dwelling occupants will become exposed to relatively higher levels of outdoor PM2.5 and lower levels of indoor PM2.5 due to the need to increase dwelling ventilation. The practical implications for government and designers and possible policy implications of this research are discussed.Practical applications: This paper demonstrates how an increase in summertime ventilation is necessary in UK homes to reduce overheating risks due to climate change and energy-efficient building retrofits. This, in turn, will lead to a change in the profile of indoor air pollution exposure, with greater exposure to pollution from outdoor sources and reduced exposure to pollution from indoor sources. Roof insulation and trickle vents reduce overheating risk, whilst increased use of mechanical ventilation heat recovery systems in the UK is encouraged, as it offers the co-benefits of cooling through increased ventilation, energy recovery and the potential to reduce indoor pollution levels.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London
Contributors: Taylor, J., Mavrogianni, A., Davies, M., Das, P., Shrubsole, C., Biddulph, P., Oikonomou, E.
Number of pages: 15
Pages: 275-289
Publication date: 26 Mar 2015
Peer-reviewed: Yes

Publication information

Journal: Building Services Engineering Research and Technology
Volume: 36
Issue number: 2
ISSN (Print): 0143-6244
Ratings: 
  • Scopus rating (2015): CiteScore 0.8 SJR 0.425 SNIP 0.731
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: EnergyPlus, Overheating, PM2.5
Source: Scopus
Source ID: 84923329093

Research output: Contribution to journalArticleScientificpeer-review

Understanding fundamental and practical ingredients of construction project data management

Purpose - This paper and research behind it aim to explain key elements behind construction project data management by looking at actual operations. The construction project management is heavily built around document control and relating events such as change orders, submittals, transmittals and requests for information. These functionalities are usually forming the core of electronic data/document management systems (EDMS), and more recently solutions based on Building Information Modelling (BIM) technologies. A growing share of buildings construction projects are designed and documented by using BIM applications. BIM applications can form spatially organised access to project data and documents which, if widely applied, can change the world of EDMS solutions. Design/methodology/approach - This paper presents results of a research effort where the use of EDMS was studied in 15 building construction case projects. The research focus was on EDMS structure, usage of EDMS in each case project and EDMS use models. Findings - The gained results explain content and characteristics of current practice. It is considered that useful knowledge can be learned from the present used of EDMS in building construction projects. This understanding can help our sector to move towards more advanced solutions. Research limitations/implications - The obtained research data are a certain kind of building development projects. These were renovation and change projects of existing buildings. Originality/value - Although the main stream of research has been technology-driven, the research behind this paper is targeting for new knowledge over the characteristics of EDMS use.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Kähkönen, K., Rannisto, J.
Number of pages: 17
Pages: 7-23
Publication date: 5 Jan 2015
Peer-reviewed: Yes

Publication information

Journal: Construction Innovation: Information, Process, Management
Volume: 15
Issue number: 1
ISSN (Print): 1471-4175
Ratings: 
  • Scopus rating (2015): CiteScore 0.97 SJR 0.443 SNIP 0.745
Original language: English
ASJC Scopus subject areas: Computer Science(all), Control and Systems Engineering, Civil and Structural Engineering, Building and Construction, Architecture
Keywords: Construction management Information systems/management, IT building design and construction, Planning and management, Project management, Team working
Source: Scopus
Source ID: 84921340330

Research output: Contribution to journalArticleScientificpeer-review

Using building simulation to model the drying of flooded building archetypes

With a changing climate, London is expected to experience more frequent periods of intense rainfall and tidal surges, leading to an increase in the risk of flooding. This paper describes the simulation of the drying of flooded building archetypes representative of the London building stock using the EnergyPlus-based hygrothermal tool 'University College London-Heat and Moisture Transfer (UCL-HAMT)' in order to determine the relative drying rates of different built forms and envelope designs. Three different internal drying scenarios, representative of conditions where no professional remediation equipment is used, are simulated. A mould model is used to predict the duration of mould growth risk following a flood on the internal surfaces of the different building types. Heating properties while keeping windows open dried dwellings fastest, while purpose built flats and buildings with insulated cavity walls were found to dry slowest.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London
Contributors: Taylor, J., Biddulph, P., Davies, M., Ridley, I., Mavrogianni, A., Oikonomou, E., Lai, K. M.
Number of pages: 22
Pages: 119-140
Publication date: 1 Mar 2013
Peer-reviewed: Yes

Publication information

Journal: JOURNAL OF BUILDING PERFORMANCE SIMULATION
Volume: 6
Issue number: 2
ISSN (Print): 1940-1493
Ratings: 
  • Scopus rating (2013): CiteScore 2.48 SJR 1.006 SNIP 1.246
Original language: English
ASJC Scopus subject areas: Architecture , Building and Construction, Modelling and Simulation, Computer Science Applications
Keywords: flood, hygrothermal, mould
Source: Scopus
Source ID: 84871083708

Research output: Contribution to journalArticleScientificpeer-review

Using probabilistic sampling-based sensitivity analyses for indoor air quality modelling

We develop a probabilistic framework for modelling indoor air quality in housing stocks, selecting appropriate sensitivity analyses to understand indoor air quality determinants, and constructing a reliable metamodel from the most relevant determinants to allow quick assessments of future intervention scenarios. The replicated Latin Hypercube sampling method is shown to be efficient at propagating variations between model input and output variables. A comparison of a range of sample-based sensitivity methods shows that an initial visual assessment can help to select appropriate sensitivity analyses, as they test for different types of relations (i.e. linear, monotonic, and non-monotonic). An advantage of linear regression methods is that the total output can be apportioned to various input variables. The advantage of tests with correlation coefficients is that the associated p-values can be used to assess whether input variables are significant. An artificial neural network constructed from a reduced set of input variables selected at a 5% level of significance is able to accurately predict indoor air quality. In the application of the framework to the modelling of winter indoor air quality in single-storey flats in England, the drivers for internally- and externally-generated PM2.5 are found to be different, therefore allowing interventions that reduce both concentrations simultaneously. Principal determinants for externally-generated PM2.5 are the internal deposition rate of PM2.5, weather-corrected volumetric infiltration rate, and ambient concentration of PM2.5, while for PM2.5 produced by gas cooking, they are the kitchen window opening area, generation rate of PM2.5, and indoor temperature.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University College London, University of Nottingham, London School of Hygiene and Tropical Medicine
Contributors: Das, P., Shrubsole, C., Jones, B., Hamilton, I., Chalabi, Z., Davies, M., Mavrogianni, A., Taylor, J.
Number of pages: 12
Pages: 171-182
Publication date: 1 Jan 2014
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 78
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2014): CiteScore 4.14 SJR 1.887 SNIP 2.742
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: Housing stock, Indoor air quality, Metamodel, Probabilistic sampling, Sensitivity analysis
Source: Scopus
Source ID: 84901003154

Research output: Contribution to journalArticleScientificpeer-review

Utilizing mixed-mineralogy ferroan magnesite tailings as the source of magnesium oxide in magnesium potassium phosphate cement

A mixed-mineralogy talc mine tailing (MT) fraction consisting of 80% ferroan magnesite (MgCO3) was studied for utilization as the source of magnesium oxide (MgO) in magnesium potassium phosphate cement (MKPC). The effects of calcination temperature of this low-grade magnesite on the composition, BET surface area and phosphate reactivity of the resulting magnesia powder were studied. The 4-point flexural strength of resulting MKPC was measured for all calcined raw material fractions that produced a solid. Based on the strength measurement results, the optimal range for calcination resided between 700 °C and 1150 °C, which is drastically lower than commonly recommended for finer magnesia sources in MKPCs. Accelerated reactivity assessment showed that phosphate reactivity behavior could not be entirely predicted by BET surface area. The presence of impurity silicates and high iron content in all the constituent minerals was posed as the reason for densification and loss of reactivity at higher calcination temperatures.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Ceramic materials, Geological Survey of Finland, VTT Technical Research Centre of Finland
Contributors: Ismailov, A., Merilaita, N., Solismaa, S., Karhu, M., Levänen, E.
Publication date: 20 Jan 2020
Peer-reviewed: Yes
Early online date: 9 Oct 2019

Publication information

Journal: Construction and building materials
Volume: 231
Article number: 117098
ISSN (Print): 0950-0618
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Materials Science(all)
Keywords: Bending strength, Chemically bonded ceramics, MgO, Mixed-mineralogy, pH, Phosphate cement, Surface area
Electronic versions: 

Bibliographical note

EXT="Karhu, Marjaana"

Source: Scopus
Source ID: 85072982997

Research output: Contribution to journalArticleScientificpeer-review

Utilizing the innovation potential of suppliers in construction projects

Purpose – The manufacturers of construction components and materials are the suppliers in construction projects, and represent a significant portion of their value. However, their knowledge is not used sufficiently when it comes to construction innovation. This research paper focuses on the suppliers' innovation potential in construction projects. The purpose of this paper is to identify practices for enhancing the contractor-supplier relationship and using the suppliers' innovation potential in construction projects. Design/methodology/approach – A qualitative exploratory research strategy is used in the context of construction projects. In total, 18 interviews were conducted with contractors to discover the experiences and practices related to the contractor-supplier relationship and construction innovation. Findings – The contractors perceive that the suppliers have innovation potential, and that they are often a source of construction innovation. The findings reveal business- and project-level practices for enhancing the contractor-supplier relationship and for overcoming barriers that hinder the suppliers' innovation potential. Research limitations/implications – The research conducted for this paper is limited to the contractors' perspectives based on construction projects in one country. Further research is encouraged to verify the success of identified practices and cover the perspectives of the suppliers, clients and designers. Originality/value – Limited research and attention is directed toward the role of the suppliers in projects within the construction industry. This paper offers important information about the part that both the suppliers and the contractors play in construction innovation and its facilitation.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Industrial and Information Management
Contributors: Sariola, R.
Publication date: 2018
Peer-reviewed: Yes
Early online date: 20 Jan 2018

Publication information

Journal: Construction Innovation
Volume: 18
Issue number: 2
ISSN (Print): 1471-4175
Ratings: 
  • Scopus rating (2018): CiteScore 2.26 SJR 0.707 SNIP 0.768
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Computer Science(all), Civil and Structural Engineering, Architecture , Building and Construction
Keywords: Construction innovation, Construction management, Construction projects, Contractor-supplier relationship, Procurement, Supply chain management
Source: Scopus
Source ID: 85040725863

Research output: Contribution to journalArticleScientificpeer-review

Variation of CPTu-based transformation models for undrained shear strength of Finnish clays

The determination of a design soil property may include multiple sources of uncertainty. One of the sources originates from transformation model used to evaluate soil parameters when they are not measured directly. This study focuses on the transformation uncertainty related to three different transformation models used in evaluation of undrained shear strength from CPTu borings. The used correlation models are common models found in literature and calibrated at Tampere University. The CPTu data used in this study was taken from Knuuti and Länsivaara [2019. Variation of Measured CPTu Data. ISGSR], and it consisted of four different soft clay sites in Finland. The transformation uncertainty was calculated for each transformation model at each site. Moreover, every CPTu boring was analysed separately. The results showed that the transformation uncertainty was lowest for models based on the net cone resistance (COV = 0.033–0.084) and pore pressure (COV = 0.024–0.085). For the third model, the uncertainty was little higher as it included more uncertainty in the initial parameters. This suggests that the transformation models based on net cone resistanse (qNET) and pore pressure (u2) could be more suitable for practice.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Knuuti, M., Länsivaara, T.
Number of pages: 9
Pages: 262-270
Publication date: 2 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Georisk
Volume: 13
Issue number: 4
ISSN (Print): 1749-9518
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Safety, Risk, Reliability and Quality, Geotechnical Engineering and Engineering Geology, Geology
Keywords: coefficient of variation, correlation models, CPTu, reliability, statistics, undrained shear strength
Source: Scopus
Source ID: 85074297150

Research output: Contribution to journalArticleScientificpeer-review

Work environment preferences - does age make a difference?

Purpose: The paper aims to identify the differences and similarities in work environment preferences of office users of different age. Design/methodology/approach: The paper analyses results of a preference survey answered by more than 1,100 office employees in Finland. The survey included questions concerning user preferences in terms of location, buildings, workspaces, and services. The analysis starts with a principal component analysis (PCA). The respondents are divided into five clusters based on their year of birth, and their responses are compared based on regression analysis. The identified differences are confirmed by discriminant analysis. Findings: The study shows that there are differences in the work environment preferences of users of different age. Significant differences were found concerning personal services, commuting, collaboration, restaurant services, and adjustability of indoor climate. The study also identifies areas in which preferences between younger and older employees did not differ remarkably, such as privacy and the virtual environment. Research limitations/implications: While the study indicates that there are preference differences in the workforce as it currently exists, it does not explain whether the identified differences are connected to generations, or if they are simply a result of age and experience. Practical implications: The paper includes findings that are valuable for all parties that are involved in designing and managing work environments. Originality/value: The results give new insights on what office users of different age prefer in their work environments. The paper proposes that some general notions regarding generational differences in the workplace lack academic evidence, and presents results that suggest that the differences are not as significant as generally thought.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University, Built Environment Services Research Group
Contributors: Rothe, P., Lindholm, A. L., Hyvönen, A., Nenonen, S.
Number of pages: 18
Pages: 78-95
Publication date: Jan 2012
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 30
Issue number: 1
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2012): CiteScore 0.62 SJR 0.444 SNIP 0.93
Original language: English
ASJC Scopus subject areas: Architecture , Building and Construction, Human Factors and Ergonomics
Keywords: Age, Finland, Preference, User studies, Workplace
Source: Scopus
Source ID: 84856168020

Research output: Contribution to journalArticleScientificpeer-review

Editorial

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Civil Engineering, Research area: Construction Management and Economics, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Anglia Ruskin University
Contributors: Achour, N., Kähkönen, K.
Number of pages: 4
Pages: 226-229
Publication date: 2017
Peer-reviewed: No

Publication information

Journal: INTERNATIONAL JOURNAL OF DISASTER RESILIENCE IN THE BUILT ENVIRONMENT
Volume: 8
Issue number: 3
ISSN (Print): 1759-5908
Ratings: 
  • Scopus rating (2017): CiteScore 0.8 SJR 0.387 SNIP 0.48
Original language: English
ASJC Scopus subject areas: Building and Construction, Safety, Risk, Reliability and Quality
Source: Scopus
Source ID: 85022331008

Research output: Contribution to journalEditorialScientific

Editorial to “The best papers from the 32nd International Symposium on Automation and Robotics in Construction and Mining (ISARC 2015)”

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Civil Engineering, Research group: Responsible Construction, Univ of Oulu
Contributors: Malaska, M., Heikkilä, R.
Number of pages: 1
Pages: 1
Publication date: 1 Nov 2016
Peer-reviewed: No

Publication information

Journal: Automation in Construction
Volume: 71
ISSN (Print): 0926-5805
Ratings: 
  • Scopus rating (2016): CiteScore 4.64 SJR 1.395 SNIP 2.737
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Civil and Structural Engineering, Building and Construction
Source: Scopus
Source ID: 84988322453

Research output: Contribution to journalEditorialScientific

Ulkoseinien rakennusfysikaaliset riskit ja pitkäaikaiskestävät ratkaisut

General information

Publication status: Published
MoE publication type: B2 Part of a book or another research book
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Salonen, J., Laukkarinen, A., Vinha, J.
Number of pages: 8
Pages: 74-81
Publication date: 2015

Host publication information

Title of host publication: Korjaa ja korota : Kerrostalojen korjaamisen ja lisäkerrosten rakentamisen ratkaisuja
Volume: 62
Place of publication: Oulu, Finland
Publisher: Oulun yliopisto
Editors: Soikkeli, A., Koiso-Kanttila, J., Sorri, L.
ISBN (Print): 978-952-62-0727-8

Publication series

Name: Oulun yliopisto, arkkitehtuurin osasto. A. Julkaisu
ISSN (Electronic): 0357-8704
ASJC Scopus subject areas: Building and Construction

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

Koko Julkisivua peittävän lasijulkisivun vaikutus Etelä-Ruotsissa sijaitsevan rakennuksen energiatehokkuuteen

Article discuss the effect of the added façade glazing on the building energy consumption in one case building in Malmö, Sweden

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Lund University
Contributors: Hilliaho, K., Nordquist, B., Wallentén, P.
Number of pages: 8
Pages: 509-516
Publication date: 20 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Editors: Vinha, J., Ruuska, T.
ISBN (Print): 978-952-15-3580-2

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu 4
No.: 4
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Double skin facade, Energy efficiency, New renovation consepts, Innovative HVAC, Earth to air heat exchancer

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Kosteusvaurioiden vakavuus kuntien rakennuksissa

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Service Life Engineering of Structures, Research area: Structural Engineering, Research group: Building Physics
Contributors: Annila, P., Lahdensivu, J., Suonketo, J., Pentti, M., Laukkarinen, A., Vinha, J.
Number of pages: 6
Pages: 135-140
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Lasitetun parvekkeen lämpötilan ja lämpöhäviöiden laskenta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics, Research group: Service Life Engineering of Structures
Contributors: Laukkarinen, A., Hilliaho, K.
Number of pages: 6
Pages: 181-186
Publication date: 20 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Editors: Vinha, J., Ruuska, T.
ISBN (Print): 978-952-15-3580-2

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu
No.: 4
ASJC Scopus subject areas: Building and Construction, Civil and Structural Engineering

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Maanvastaisten seinien lämpö- ja kosteustekninen toiminta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Tampere University of Technology, Laboratory of Civil Engineering
Contributors: Laukkarinen, A., Heiskanen, R., Vinha, J.
Number of pages: 6
Pages: 71-76
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

INT=rak,"Heiskanen, Roosa"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Puukerrostalon työmaavaiheen lämpö- ja kosteusolosuhteiden mittaukset

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Research group: Capacity Development of Water and Environmental Services CADWES, Laboratory of Civil Engineering, Tampere University of Technology
Contributors: Laukkarinen, A., Musakka, S., Penttilä, O., Teriö, O., Vinha, J.
Number of pages: 6
Pages: 167-172
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

INT=RAK, "Musakka, Sami"
INT=RAK, "Penttilä, Olavi"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Puukerrostalorakentamisen kosteudenhallinta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Building Physics, Tampere University of Technology, Laboratory of Civil Engineering
Contributors: Teriö, O., Penttilä, O., Laukkarinen, A., Musakka, S., Vinha, J.
Number of pages: 6
Pages: 173-178
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

INT=rak,"Penttilä, Olavi"
INT=rak,"Musakka, Sami"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Puurunkoisten tuuletettujen yläpohjien kosteustekninen toiminta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Junttila, H., Laukkarinen, A., Vinha, J.
Number of pages: 6
Pages: 77-82
Publication date: 22 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere.
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Editors: Vinha, J., Ruuska, T.
ISBN (Print): 978-952-15-3580-2

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu
No.: 4
ASJC Scopus subject areas: Building and Construction, Civil and Structural Engineering

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Raudoitteiden korroosionopeuden määrittäminen betonijulkisivussa korkean aikaresoluution säädatan avulla

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Research group: Building Physics, The Finnish Meteorological Institute. Ilmatieteen laitos.
Contributors: Köliö, A., Hohti, H., Pakkala, T., Laukkarinen, A., Lahdensivu, J., Mattila, J.
Number of pages: 8
Pages: 195-202
Publication date: 20 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere.
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
ISBN (Print): 978-952-15-3580-2

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu
No.: 4
ASJC Scopus subject areas: Building and Construction, Civil and Structural Engineering

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Uudessa COMBI-hankkeessa tutkitaan energiatehokkaan palvelurakentamisen haasteita ja ratkaisuja

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics, School of Architecture, Research group: ASUTUT, Research area: Structural Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Research group: Service Life Engineering of Structures, Aalto University, Tampere University of Applied Sciences TAMK
Contributors: Vinha, J., Hedman, M., Sirén, K., Harsia, P., Pentti, M., Teriö, O., Heljo, J., Laukkarinen, A., Annila, P., Kaasalainen, H., Jokisalo, J., Pihlajamaa, P.
Number of pages: 10
Pages: 487-496
Publication date: 20 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere.
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Editors: Vinha, J., Ruuska, T.
ISBN (Print): 978-952-15-3580-2

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu
No.: 4
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

ORG=rak,0.8
ORG=ark,0.2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Alkali-silica reaction in finnish swimming pools

Finland has traditionally been considered an alkali-silica reaction (ASR) free country. This was thought to be due to the exceptional quality of the mostly coarse crystalline igneous rocks. However, during the last few years dozens of cases of ASR have been reported. The scope of this study was to survey the occurrence and the propagation time of ASR in recent investigations of swimming pool structures. The research data consists of 9 condition investigation reports, and the reports of 144 thin section analyses, 188 tensile strength analyses and 29 compressive strength analyses made during 2005-2018. According to the research data, the occurrence of ASR is spread all over Finland. The reacting aggregates consist of rock types which are considered relatively stable or low reacting in literature. This may explain the relatively late emergence, usually around 40 years, of ASR. However, the swimming pool environment, with relatively high temperatures and humidity, is more favourable for ASR than the average Finnish outdoor climate. In most cases ASR has been incipient. Only few of the tensile strength tests made have indicated local weathering in the leaking concrete pool. ASR can be reliably detected in a petrographic thin section analysis, but evaluating the degree of ASR -caused damage also requires tensile strength testing. Observations of silica gel, or reacting aggregate, do not necessarily indicate serious damage or direct correlation with the degree of cracking. Therefore, parallel test methods, i.e. thin section analyses and tensile strength tests, are needed to diagnose the ASR in a concrete structure and the possibility of repair.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Ramboll Finland Ltd.
Contributors: Lahdensivu, J., Kekäläinen, P.
Number of pages: 8
Pages: 2006-2013
Publication date: 2019

Host publication information

Title of host publication: Proceedings of the fib Symposium 2019 : Concrete - Innovations in Materials, Design and Structures
Publisher: International Federation for Structural Concrete
Editors: Derkowski, W., Krajewski, P., Gwozdziewicz, P., Pantak, M., Hojdys, L.
ISBN (Electronic): 9782940643004

Publication series

Name: fib Symposium Proceedings
ISSN (Electronic): 2617-4820
ASJC Scopus subject areas: Building and Construction, Architecture , Civil and Structural Engineering
Keywords: Alkali-silica reaction, Concrete, Concrete petrography, Initiation time, Swimming pool

Bibliographical note

EXT="Lahdensivu, Jukka"

Source: Scopus
Source ID: 85066082822

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A slotted patch antenna for wireless strain sensing

This research studies the wireless strain sensing performance of a slotted patch antenna sensor. In our previous work, a folded patch antenna was designed for passive wireless strain and crack sensing. When experiencing deformation, the antenna shape changes, causing shift in electromagnetic resonance frequency of the antenna. The wireless interrogation system utilizes the principle of electromagnetic backscattering and adopts off-the-shelf 900MHz radiofrequency identification (RFID) technology. In this research, a new slotted patch antenna sensor is designed and tested. The antenna detours surface current using slot patterns so that the electrical length is kept similar as previous folded patch antenna. As a result, the sensor footprint is reduced and the antenna resonance frequency is maintained within 900MHz RFID band. To accurately describe both mechanical and electromagnetic behaviors of the antenna sensor, a multi-physics coupled simulation approach is pursued. Implemented through a commercial software package, COMSOL, a multi-physics finite element model of the antenna uses the same geometry and meshing for both mechanical and electromagnetic simulations. Wireless strain sensing performance of the antenna is first simulated using the multi-physics model. In addition, experimental tensile tests are performed to investigate the correlation between wirelessly interrogated resonance frequency and the strain experienced by the antenna. The strain sensing performance is tested.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Georgia Institute of Technology, Virginia Tech
Contributors: Yi, X., Cho, C., Cook, B., Wang, Y., Tentzeris, M. M., Leon, R. T.
Number of pages: 10
Pages: 2734-2743
Publication date: 2014

Host publication information

Title of host publication: Structures Congress 2014 - Proceedings of the 2014 Structures Congress
Publisher: American Society of Civil Engineers ASCE
ISBN (Electronic): 9780784413357
ASJC Scopus subject areas: Building and Construction, Civil and Structural Engineering
Source: Scopus
Source ID: 84934325955

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

BIM based schedule control for precast concrete supply chain

Development of the schedule control of precast concrete supply chain has been studied. Main idea was to use BIM model created by structural engineer as a user-interface for schedule control, for saving different status information of the real-time schedule situation of the propagation of structural design, element manufacture, delivery and site erection directly to the BIM model by using a cloud-based networked service. Some of the missing software applications were programmed by the software companies participated in the project. Experiments were done in a real construction project in Finland, where the information from design, prefabrication, delivery and erection phases was synchronized between the stakeholders by using the cloud service. The most important observations and results are introduced and analyzed. A future model for intelligent BIM based schedule control concept is concluded.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Skanska Oy, Construction Technology Research Center, University of Oulu
Contributors: Nissilä, J., Heikkilä, R., Romo, I., Malaska, M., Aho, T.
Number of pages: 5
Pages: 667-671
Publication date: 2014

Host publication information

Title of host publication: 31st International Symposium on Automation and Robotics in Construction and Mining, ISARC 2014 - Proceedings
Publisher: University of Technology Sydney
ISBN (Print): 9780646597119
ASJC Scopus subject areas: Artificial Intelligence, Hardware and Architecture, Civil and Structural Engineering, Building and Construction
Keywords: BIM, Precast concrete, Schedule control, Supply chain
Source: Scopus
Source ID: 84912527773

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Buckling length assessment with finite element approach

In the design of steel frames, the consideration of stability and buckling is an important issue. It can be done in multiple ways. If the concept of buckling length is used, widely used procedure is to calculate the eigenmodes and corresponding eigenvalues for the frame and by using them define buckling length of the members with the well-known Euler’s equation. However, it maybe difficult to tell, which eigenmode should be used for the definition of the buckling length of a specific member. Conservatively, the lowest positive eigenvalue can be used for all members. In this contribution, two methods to define the buckling length of a specific member are considered. The first one uses geometric stiffness matrix locally and the other one uses strain energy measures to identify members taking part in a buckling mode. Compared to simplified approaches presented in literature the approaches based on the finite element discretization have certain advantages. First, the method is applicable to any kind of distributed loading. Secondly, also tapered members can be handled with the technique. Moreover, the out-of-plane buckling behavior and with suitable element the lateral buckling loads can be also be assessed. The applicability and features of the methods are shown in a numerical 3D example. Both methods can be relatively easily implemented into automated frame design procedure. This is essential when optimization of frames is considered.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering
Contributors: Tiainen, T., Mela, K., Heinisuo, M.
Number of pages: 6
Pages: 1145-1150
Publication date: 2019

Host publication information

Title of host publication: Stability and Ductility of Steel Structures - Proceedings of the International Colloquia on Stability and Ductility of Steel Structures, 2019
Publisher: CRC Press/Balkema
Editors: Wald, F., Jandera, M.
ISBN (Print): 9780367335038
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Safety, Risk, Reliability and Quality
Source: Scopus
Source ID: 85079242864

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Building energy-efficiency interventions in North-East Europe: Effects on indoor environmental quality and public health

INSULAtE project aims to develop a common protocol for assessment of improving energy efficiency (EE) of dwellings on indoor environmental quality (IEQ) and public health in Europe. So far, measurement data on IEQ parameters (PM, CO, CO2, VOCs, formaldehyde, NO2, radon, T and RH) and questionnaire data from occupants were collected from 16 multifamily buildings (94 apartments) in Finland and 20 (96 apartments) in Lithuania before renovation. Most parameters were within recommended limits; however, the data revealed different baselines (before renovation) for each country both in terms of the IEQ parameters and the respondents' satisfaction regarding their residence and indoor air quality. Post renovation data (from one building in each country) showed potential changes in the measured parameters, while further analyses are needed once the data have been collected. The results of this project will be used in developing guidance and support the implementation of the related policies.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Research group: Concrete and Bridge Structures, Department of Civil Engineering, Research group: Responsible Construction, National Public Health Institute, Kaunas University of Technology
Contributors: Du, L., Prasauskas, T., Leivo, V., Turunen, M., Aaltonen, A., Kiviste, M., Martuzevicius, D., Haverinen-Shaughnessy, U.
Number of pages: 3
Pages: 637-639
Publication date: 2014

Host publication information

Title of host publication: Indoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate
Publisher: International Society of Indoor Air Quality and Climate
ASJC Scopus subject areas: Pollution, Building and Construction, Health, Toxicology and Mutagenesis, Computer Science Applications
Keywords: Environmental monitoring, Exposure, Health questionnaire, Residential buildings
Source: Scopus
Source ID: 84924672127

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Characterization of charge in airborne fungal spores

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research area: Aerosol Physics, Research area: Optics, Urban circular bioeconomy (UrCirBio), University of Cincinnati, Ita-Suomen yliopisto, Dekati Ltd
Contributors: Reponen, T., Saari, S., Mensah-Attipoe, J., Ukkonen, A., Veijalainen, A., Pasanen, P., Keskinen, J.
Number of pages: 3
Pages: 359-361
Publication date: 2014

Host publication information

Title of host publication: Indoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate
Publisher: International Society of Indoor Air Quality and Climate
ASJC Scopus subject areas: Pollution, Building and Construction, Health, Toxicology and Mutagenesis, Computer Science Applications
Keywords: Aerosolization, Agar, Air velocity, Surface
Source: Scopus
Source ID: 84924739791

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Crack propagation measurement using a battery-free slotted patch antenna sensor

This research studies the performance of a battery-free wireless antenna sensor for measuring crack propagation. In our previous work, a battery-free folded patch antenna was designed for wireless strain and crack sensing. When experiencing deformation, the antenna shape changes, causing shift in electromagnetic resonance frequency of the antenna. The wireless interrogation system utilizes the principle of electromagnetic backscattering and adopts off-the-shelf 900MHz radiofrequency identification (RFID) technology. Following the same sensing mechanism, a slotted patch antenna sensor of smaller size is designed. The antenna detours surface current using slot patterns, so that the effective electrical length is kept similar as previous folded patch antenna. As a result, the sensor footprint is reduced and the antenna resonance frequency is maintained within 900MHz RFID band. To validate the sensor performance for crack sensing, a fatigue crack experiment is conducted on a steel compact-tension specimen. A slotted patch antenna sensor is installed at the center of the A36 steel specimen. For wireless interrogation, a Yagi reader antenna is placed 36 in. away from the antenna sensor to wirelessly measure the resonance frequency shift of the antenna sensor. The measurement is taken after every 10,000 loading cycles, till the specimen fails. Meanwhile, the length and width of the fatigue crack are also recorded. Finally, the resonance frequency shift of the antenna sensor is correlated with crack length and width at each loading stage.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Georgia Institute of Technology, Georgia Institute of Technology, School of Electrical and Computer Engineering, Virginia Tech
Contributors: Yi, X., Cho, C., Wang, Y., Cook, B., Tentzeris, M. M., Leon, R. T.
Number of pages: 8
Pages: 1040-1047
Publication date: 2014

Host publication information

Title of host publication: 7th European Workshop on Structural Health Monitoring, EWSHM 2014 - 2nd European Conference of the Prognostics and Health Management (PHM) Society
Publisher: INRIA
ASJC Scopus subject areas: Civil and Structural Engineering, Safety, Risk, Reliability and Quality, Building and Construction, Computer Science Applications
Keywords: Battery-free sensor, Fatigue crack, RFID, Slotted patch antenna
Source: Scopus
Source ID: 84939455742

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Employing a multi-Objective robust optimisation method for healthy and low-energy dwelling design in Delhi, India

Dwelling design needs to consider multiple objectives and uncertainties to achieve effective and robust performance. A multi-objective robust optimisation method is outlined and then applied with the aim to optimise a one-story archetype in Delhi to achieve a healthy low-energy design. EnergyPlus is used to model a sample of selected design and uncertainty inputs. Sensitivity analysis identifies significant parameters and a meta-model is constructed to replicate input-output relationships. The meta-model is employed in a hybrid multi-objective optimisation algorithm that accounts for uncertainty. Results demonstrate the complexities of achieving a low energy consumption and healthy indoor environmental quality.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: University College London, University of Oxford
Contributors: Nix, E., Das, P., Taylor, J., Davies, M.
Number of pages: 8
Pages: 2093-2100
Publication date: 1 Jan 2015

Host publication information

Title of host publication: Proceedings of the 2014 Building Simulation and Optimization Conference
ASJC Scopus subject areas: Computer Science Applications, Architecture , Modelling and Simulation, Building and Construction
Source: Scopus
Source ID: 84976351471

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Fatigue loading tests of concrete railway sleepers

In fatigue loading tests, unused Finnish concrete railway sleepers of type B97 and BP99 were loaded. The purpose of the loading tests was to analyse the fatigue properties of the sleepers and the effect of fatigue on their stiffness. The significance of cracks was also estimated. The load levels were chosen so that it was possible to estimate the significance of fatigue in actual use. A total of 11 fatigue loading tests were run. Eight targeted the rail seat section and three the centre. One sleeper was also loaded only statically to serve as a reference. In fatigue loading tests sleeper specimens were subjected to 200,000 loading cycles with standard load, after which they were loaded statically to failure. Sleepers in rail seat section tests failed at under 200,000 cycles when the loading level was 195 kN or higher. A fatigue model depicting the relationship between the stress level of the sleeper and the number of loading cycles it is subjected to was developed based on the results of the fatigue loading tests. The fatigue limit determined based on the loading tests and the calculated limit state of crack formation were clearly higher than the bending moments measured in field tests. Consequently, deterioration of the railway sleepers under a traffic load and due to fatigue is highly unlikely.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Research group: Track Structures
Contributors: Rantala, T., Kerokoski, O., Nurmikolu, A., Laaksonen, A.
Number of pages: 8
Pages: 1445-1452
Publication date: 2018

Host publication information

Title of host publication: High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium
Publisher: Springer International Publishing
ISBN (Electronic): 9783319594705
ASJC Scopus subject areas: Architecture , Building and Construction, Civil and Structural Engineering
Keywords: Concrete railway sleeper, Fatigue, Loading test
Source: Scopus
Source ID: 85025683818

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Leveraging concepts for environmentally sustainable business management in construction - a focused review

The main objective of this paper is to advance applied conceptual knowledge about environmentally sustainable business management (BM) in construction. Environmentally sustainable BM is herein defined to encompass the utilization and development of natural resources in ways which are compatible with the maintenance of these resources, and with the conservation of the natural and built environments, for current and future generations. In principle, concept designers can incorporate environmental sustainability into their BM concepts as a dimension, an element, or an attribute of managing, or as a criterion in decision making. Readily, the 71 construction-related BM concepts have been published between 1990 and 2013. A focused review resulted in the expected findings, i.e., only the 11 (15%) construction-related BM concepts have been designed along the environmental sustainability dimension. Thus, it is posited that high-sustainability BM concepts be designed by coupling environmental sustainability with the three other necessary dimensions, i.e., content-free frames of reference on BM, schools of thought on generic BM, and focal contexts in construction, respectively. In turn, CIB-related researchers may adopt these couplings and engage themselves with cross-disciplinary BM conceptualization programs in collaboration with farsighted business managers in construction.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector
Contributors: Huovinen, P.
Number of pages: 11
Pages: 286-296
Publication date: 2015

Host publication information

Title of host publication: CIB Proceedings 2015 : Going North for Sustainability: Leveraging Knowledge and Innovation for Sustainable Construction and Development
Place of publication: London, UK
Publisher: IBEA Publications Ltd
Editor: Egbu , C.
ISBN (Print): 978-1-326-47951-0
ASJC Scopus subject areas: Building and Construction
Keywords: business management, concept design, construction, environmental sustainability, research review

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Project feedback as a tool for learning

In construction, project feedback has often been seen primarily as a means to measure customer satisfaction. Even though the measurement of customer satisfaction is an important factor, feedback infor mation also has other purposes, for example, it highlights the frailties of the operations. With the help of the feedback information, companies can uncover development targets and develop their own com petencies and co-operation competencies. Thus feedback information is also a vehicle for sharing knowledge about experiences and good solutions and thereby operates as a part of knowledge mechanism and learning. Construction can be characterized as a specific type of project industry, with specific features concerning production, such as temporality, bounded location and one-off products. From the point of view of learning, the uniqueness and temporality of the project organization bring their own challenges and difficulties. In this article we concentrate on how those challenges and difficulties can be overcome with the help of feedback information. The questions of this paper are defined as follows: • How does the uniqueness and temporality of a project organisation affect the learning processes? • How can feedback be used to intensify knowledge transfer and learning for the parties of the construction project?

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Responsible Construction, Civil Engineering, Aalto University
Contributors: Kärnä, S., Junnonen, J. M.
Number of pages: 9
Pages: 47-55
Publication date: 1 Dec 2005

Host publication information

Title of host publication: 13th International Group for Lean Construction Conference : Proceedings
ISBN (Print): 1877040347, 9781877040344

Publication series

Name: 13th International Group for Lean Construction Conference: Proceedings
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Customer satisfaction, Feedback, Learning organization
Source: Scopus
Source ID: 84856671776

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Second-order analysis of prestressed concrete columns

The use of prestressed concrete columns has been quite rare in Finland, mainly for reason of a lack of national design regulations and guidelines. To promote their use, the Confederation of Finnish Construction Industries initiated a research project on precast prestressed concrete columns, in connection with an extensive research programme at Tampere University examining slender concrete structures. A displacement-based calculation model developed earlier in the programme for reinforced concrete columns and piles was developed further for evaluating the buckling of slender prestressed columns. The researchers applied this model to compare structural behaviour between prestressed and reinforced columns of the same dimensions and concrete strength and to evaluate the structure’s suitability for test specimens for a later, experimental stage of research. The prestressed cross section cracked only after quite considerable bending. With simultaneous compressive force to the top of the column, there was even less cracking. The mathematical calculations took into account the normal force dependent bending stiffness. The results reveal a significant reduction in the amount of steel material necessary when prestressing is applied.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Tampere University of Technology, Civil Engineering
Contributors: Haavisto, J., Kerokoski, O., Laaksonen, A.
Number of pages: 7
Pages: 1068-1074
Publication date: 2019

Host publication information

Title of host publication: Proceedings of the fib Symposium 2019 : Concrete - Innovations in Materials, Design and Structures
Publisher: International Federation for Structural Concrete
Editors: Derkowski, W., Krajewski, P., Gwozdziewicz, P., Pantak, M., Hojdys, L.
ISBN (Electronic): 9782940643004

Publication series

Name: Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
ASJC Scopus subject areas: Building and Construction, Architecture , Civil and Structural Engineering
Keywords: Behaviour, Buckling, Column, Concrete, Prestressing
Source: Scopus
Source ID: 85066083246

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Structural analysis of tubular truss in fire

Tubular trusses with welded gap joints are internally indeterminate if they are modeled with beam elements using continuous chords and eccentricities at the joints. Trusses may be externally statically determinate or not, depending on their support conditions. The start point was a tubular truss, which was sizing and shape optimized. This means that the members and the joints can resist just the load in normal situation. Next the same truss was analyzed using material and geometrical non-linear theory with reduced load in fire allowing horizontal displacement at the other end and restraining it. The idea was to study: 1) is the normal tubular truss such that in externally determinate case the linear theory can be used in fire, 2) what happens in externally indeterminate case? The results were: 1) the linear analysis can be used in fire to determine the stress resultants and 2) the linear model is very conservative.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Department of Civil Engineering, Research group: Metal and Light-wight structures
Contributors: Diez Albero, J. A., Tiainen, T., Mela, K., Heinisuo, M.
Number of pages: 7
Pages: 181-187
Publication date: 2015

Host publication information

Title of host publication:  ISTS15, 15th International Symposium on Tubular Structures, : 27-29 May 2015
Publisher: CRC Press/Balkema
ISBN (Print): 9781138028371
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

INT=rak,"Diez Albero, J. A."

Source: Scopus
Source ID: 84942280092

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

The target reliability of the eurocodes

The target reliability of the Eurocodes is given clearly: One-year reliability is 4.7 and 50-year reliability 3.8 correspondingly. However, the implementation of the direction is unclear in many ways: The reliability calculations for the Eurocodes are made sometimes by using one-year reliability 4.45 or 4.2. The Eurocodes does not instruct for which reference time the reliability is calculated. Normally, the reliability is calculated for the service time, 50 years, but sometimes for one year. The paper concludes that the reliability must be calculated for the service time. The independent versus the dependent load combination results in different reliability. The independent load combination results in higher reliability with fixed safety factors and up to about 10 % less safety factors with fixed target reliability when two loads are combined and with three loads even less. The loads are combined in the Eurocodes sometimes independently and sometimes dependently. Arguments are given here that the loads must be combined dependently. The variable load distribution is generally assumed Gumbel. However, this distribution is excessively safe as it has a robust upper tail which unrealist ically affects the reliabilit y. Normal distribut ion is one possible alternative, however obviously somewhat unsafe. In the paper, the safety factors are given based on Gumbel and normal distribution. The combination of 20 % Gumbel and 80 % normal distribution is one feasible option. In the current reliability calculation 50-year return load, i.e. 0.98 fractile of the load distribution is usually set at the characteristic load with the target reliability of the service time. This means that one-year loads are only considered in the reliability calculation. For this reason the variable load safety factors are unrealistically low as the target reliability corresponds to the service time loads. Gumbel distribution partly counterbalances the unsafe error but the overall effect is unsafe. The material factors of the Eurocodes are given based on the current calculation and modified calculation. The paper concludes that the reliability should be calculated for the service time loads with the distributions set at the service time location and the reference reliability should be 3.8. The issue of partial factors and design values is shortly addressed and concluded that the design value code is simple with better reliability accuracy than the current partial factor code when the characteristic variable load is made variable.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Poutanen, T.
Number of pages: 7
Pages: 202-208
Publication date: 2015

Host publication information

Title of host publication: Safety, Robustness and Condition Assessment of Structures
Publisher: International Association for Bridge and Structural Engineering (IABSE)

Publication series

Name: IABSE Symposium Report
ISSN (Print): 2221-3783
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Safety, Risk, Reliability and Quality
Keywords: Code, Design value, Gumbel distribution, Normal distribution, Partial factor, Reliability
Source: Scopus
Source ID: 84929340776

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Validation of the method to evaluate the corrosion propagation stage by hygrothermal simulation

Evaluating the propagation period for reinforcement corrosion in concrete facades is an important but complex task which contains a high level of uncertainty. Corrosion current intensity during the propagation period have been measured in a large number of studies and there is a general consensus in regard to factors affecting carbonation induced corrosion. Hence, a proper evaluation of hygrothermal conditions in concrete facade becomes crucial. In this study a method to calculate the corrosion propagation period was validated based upon a field survey of prefabricated concrete facades in large-panel apartment buildings. The method combines existing corrosion propagation models and the Delphin dynamic hygrothermal simulation tool, and takes into consideration material properties, carbonation depth, concrete cover depth, indoor and outdoor climate loads. With the proposed method, propagation consists of a time that is required for a concrete cover to begin cracking and a further expansion of the crack to open to 0.3 mm in width. As a result, the method is validated via the correlation between measured and calculated propagation periods across a range of twenty years. The sensitivity of the results are also studied. The method allows for an evaluation to be carried out on degradation, residual service life, and the need for the renovation of reinforced concrete facades.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Tallinn University of Technology
Contributors: Ilomets, S., Kalamees, T., Lahdensivu, J.
Number of pages: 8
Pages: 1113-1120
Publication date: 2016

Host publication information

Title of host publication: CESB 2016 - Central Europe Towards Sustainable Building 2016: Innovations for Sustainable Future
Publisher: Czech Technical University in Prague
ISBN (Electronic): 9788027102488
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Concrete damage, Corrosion model, Corrosion propagation, Hygrothermal simulation, Service life

Bibliographical note

EXT="Kalamees, Targo"

Source: Scopus
Source ID: 84986883167

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Tuberculosis transmission: Modelled impact of air-tightness in dwellings in the UK

High CO2 emissions from the residential sector have forced UK authorities to promote measures to improve energy efficiency through retrofit. Air-tightening can reduce infiltration rates, thereby decreasing ventilation heat losses, but also reducing indoor air quality. This paper presents an initial investigation of the increase in airborne transmission risk of Tuberculosis (TB) due to air-tightening in two of the most commonly-occurring dwelling types in London (purpose-built flat and terraced). EnergyPlus is used to calculate the ventilation rate of the main bedroom over a year for a range of building permeabilities representing the current and air-tightened stock. The Wells-Riley equation is then used to calculate the risk of infection under three different rates of TB generation. Results indicate the potential for increased airborne TB transmission between building occupants following air-tightening, with occupants of flats more susceptible to infection, particularly at high TB generation rates.

General information

Publication status: Published
MoE publication type: Not Eligible
Organisations: University College London
Contributors: Taylor, J., Altamirano-Medina, H., Shrubsole, C., Das, P., Biddulph, P., Davies, M., Mavrogianni, A., Oikonomou, E.
Number of pages: 8
Pages: 60-67
Publication date: 1 Jan 2014
Peer-reviewed: Unknown
Event: Paper presented at 13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014, Hong Kong, Hong Kong.
ASJC Scopus subject areas: Pollution, Building and Construction, Health, Toxicology and Mutagenesis, Computer Science Applications
Keywords: Building archetypes, Building simulation, EnergyPlus, London, Tuberculosis
Source: Scopus
Source ID: 84924718680

Research output: Other conference contributionPaper, poster or abstractScientific

Using probabilistic sampling-based sensitivity analyses for indoor air quality modelling

General information

Publication status: Published
MoE publication type: Not Eligible
Organisations: London School of Hygiene and Tropical Medicine, University of Nottingham, University College London
Contributors: Das, P., Chalabi, Z., Davies, M., Hamilton, I., Jones, B., Mavrogianni, A., Shrubsole, C., Taylor, J.
Number of pages: 3
Pages: 553-555
Publication date: 1 Jan 2014
Peer-reviewed: Unknown
Event: Paper presented at 13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014, Hong Kong, Hong Kong.
ASJC Scopus subject areas: Pollution, Building and Construction, Health, Toxicology and Mutagenesis, Computer Science Applications
Keywords: Housing stock, Indoor air quality, Intervention, Metamodel, Probabilistic sensitivity analysis
Source: Scopus
Source ID: 84924692116

Research output: Other conference contributionPaper, poster or abstractScientific

Julkisivujen ja parvekkeiden talvikorjaus 2018

General information

Publication status: Published
MoE publication type: D5 Text book, professional manual or guide or a dictionary
Organisations: Civil Engineering, Research group: Service Life Engineering of Structures
Contributors: Pakkala, T., Lahdensivu, J., Köliö, A., Annila, P.
Publication date: 2018

Publication information

Place of publication: Vaasa
Publisher: Suomen Betoniyhdistys r.y.
ISBN (Print): 978-952-68619-8-2
Original language: Finnish

Publication series

Name: BY Tekniset ohjeet
No.: 70
ISSN (Print): 0358-5239
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Research output: Book/ReportBookProfessional

Tuulettuvien yläpohjien lämpö- ja kosteustekninen toiminta nykyisessä ja tulevaisuuden ilmastossa

General information

Publication status: Published
MoE publication type: G2 Master's thesis, polytechnic Master's thesis
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Laukkarinen, A.
Number of pages: 107
Publication date: Oct 2015

Publication information

Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Original language: Finnish
ASJC Scopus subject areas: Building and Construction, Civil and Structural Engineering
URLs: 

Research output: Book/ReportMaster's ThesisScientific

Retrofit solutions for solid wall dwellings in England: The impact of uncertainty upon the energy performance gap

This study seeks to evaluate the impact of uncertainty in the pre-retrofit thermal performance of solid walls of English dwellings on post-retrofit energy use. Five dwelling archetypes, broadly representative of English solid wall properties, were modelled pre- and post-retrofit, under different wall insulation scenarios, using dynamic thermal simulation. Findings indicate that whilst solid wall insulation could result in a significant reduction of space heating demand, uncertainties in the pre-retrofit solid wall U-value could lead to a gap between the anticipated and actual energy performance. Specifically, results show that if the current U-value assumption of 2.1 W/m2K is indeed an overestimation of the in-situ U-value of solid walls, then the anticipated carbon savings could be significantly reduced by up to 65%. Practical application: The performance gap observed in this study revealed that the actual carbon savings arising from the retrofit of solid wall properties could be significantly lower than predicted. This will not only affect UK Government carbon reduction targets but it can also result in a lack of confidence amongst stakeholders who may consequently doubt the effectiveness of energy retrofit measures, thus reducing their uptake. Uncertainties regarding solid wall U-values may necessitate the re-examination of the carbon targets set for the retrofit of solid wall dwellings and the exploration of alternative ways to further reduce their carbon emissions, e.g. by specifying higher insulation thicknesses.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: University College London
Contributors: Loucari, C., Taylor, J., Raslan, R., Oikonomou, E., Mavrogianni, A.
Number of pages: 21
Pages: 614-634
Publication date: 1 Sep 2016
Peer-reviewed: Yes

Publication information

Journal: Building Services Engineering Research and Technology
Volume: 37
Issue number: 5
ISSN (Print): 0143-6244
Ratings: 
  • Scopus rating (2016): CiteScore 0.77 SJR 0.407 SNIP 0.57
Original language: English
ASJC Scopus subject areas: Building and Construction
Keywords: EDSL-TAS, Performance gap, solid wall insulation, U-value, uncertainty
Source: Scopus
Source ID: 84982179127

Research output: Contribution to journalReview ArticleScientificpeer-review

Review of linguistic approach in the workplace management research

Purpose: The purpose of this article is to review the use of linguistic methods such as narrative and discourse analysis in workplace management research. Design/methodology/approach: Ten journals are reviewed in a time period of six years between years 2004-2010. The journals are categorized into three linguistic methodological journals and seven journals on built environment. Additionally articles were gathered with search words of workplace management, discourse and narrative analysis. Out of the total 2,245 articles, 40 articles were considered to be relevant for this research. Findings: The linguistic methods of narrative and discourse analysis are not recognized in the workplace management research in a comprehensive way by combining the research on built environment to the research on organization and culture. In the workplace management research methods of narrative and discourse analysis were applied to the processes of built environment. Additionally methods were applied to the research of space and place as means of communication and means of identity construction. Practical implications: Linguistic approach would reveal underlying messages behind evident structures of workplace and give new insights on understanding and developing workplaces both in design and in use. Originality/value: The linguistic methods of narrative and discourse analysis are rarely used in workplace management research and should be considered as a new resource in the research of WPM.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University, School of Engineering, Built Environment Services Research Group (BES)
Contributors: Airo, K., Nenonen, S.
Number of pages: 19
Pages: 27-45
Publication date: Jan 2014
Peer-reviewed: Yes

Publication information

Journal: Facilities
Volume: 32
Issue number: 1-2
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2014): CiteScore 1.1 SJR 0.536 SNIP 1.259
Original language: English
ASJC Scopus subject areas: Human Factors and Ergonomics, Architecture , Building and Construction
Keywords: Discourse analysis, Management, Methods, Narrative analysis, Social constructionism, Workplace
Source: Scopus
Source ID: 84893485147

Research output: Contribution to journalReview ArticleScientificpeer-review

Urban social housing resilience to excess summer heat

The potential levels of exposure to indoor overheating in an urban environment are assessed for vulnerable social housing residents. Particular focus is given to the synergistic effects between summertime ventilation behaviour, indoor temperature and air pollutant concentration in relation to energy retrofit and climate change. Three different types of social housing are investigated (1900s' low-rise, 1950s' mid-rise and 1960s' high-rise). The case study dwellings are located in Central London and occupied by vulnerable individuals (elderly and/or people suffering from ill-health or mobility impairment). Indoor temperature monitoring suggests that occupants are already exposed to some degree of overheating; the highest levels of overheating occur in 1960s' high-rise tower blocks. The thermal and airflow performance simulation of a mid-floor flat in the 1960s' block under the current and projected future climate indicates that improved natural ventilation strategies may reduce overheating risk to a certain extent, with night cooling and shading being slightly more effective than all-day rapid ventilation. However, their potential may be limited in future due to high external temperatures and the undesired ingress of outdoor pollutants. This highlights the need for the development of combined strategies aiming to achieve both indoor thermal comfort and air quality.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: University College London, London Borough of Islington Council
Contributors: Mavrogianni, A., Taylor, J., Davies, M., Thoua, C., Kolm-Murray, J.
Number of pages: 18
Pages: 316-333
Publication date: 4 May 2015
Peer-reviewed: Yes

Publication information

Journal: Building Research and Information
Volume: 43
Issue number: 3
ISSN (Print): 0961-3218
Ratings: 
  • Scopus rating (2015): CiteScore 2.72 SJR 1.536 SNIP 1.646
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Adaptation, Climate change, Heat stress, Housing, Indoor air quality, Overheating, Public health, Resilience, Thermal comfort
Source: Scopus
Source ID: 84923186572

Research output: Contribution to journalReview ArticleScientificpeer-review