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Second-order analysis of prestressed concrete columns

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Details

Original languageEnglish
Title of host publicationProceedings of the fib Symposium 2019
Subtitle of host publicationConcrete - Innovations in Materials, Design and Structures
EditorsWit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys
PublisherInternational Federation for Structural Concrete
Pages1068-1074
Number of pages7
ISBN (Electronic)9782940643004
Publication statusPublished - 2019
Publication typeA4 Article in a conference publication
Eventfib Symposium -
Duration: 1 Jan 2000 → …

Publication series

Name FIB symposium proceedings
ISSN (Electronic)2617-4820

Conference

Conferencefib Symposium
Period1/01/00 → …

Abstract

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.

Keywords

  • Behaviour, Buckling, Column, Concrete, Prestressing

Publication forum classification

Field of science, Statistics Finland