Tampere University of Technology

TUTCRIS Research Portal

Cold-formed RHS T joints with initial geometrical imperfections

Research output: Contribution to journalArticleScientificpeer-review

Standard

Cold-formed RHS T joints with initial geometrical imperfections. / Garifullin, M.; Bronzova, M. K.; Heinisuo, M.; Mela, K.; Pajunen, S.

In: Magazine of Civil Engineering, Vol. 80, No. 4, 2018, p. 81-94.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Garifullin, M, Bronzova, MK, Heinisuo, M, Mela, K & Pajunen, S 2018, 'Cold-formed RHS T joints with initial geometrical imperfections', Magazine of Civil Engineering, vol. 80, no. 4, pp. 81-94. https://doi.org/10.18720/MCE.80.8

APA

Vancouver

Author

Garifullin, M. ; Bronzova, M. K. ; Heinisuo, M. ; Mela, K. ; Pajunen, S. / Cold-formed RHS T joints with initial geometrical imperfections. In: Magazine of Civil Engineering. 2018 ; Vol. 80, No. 4. pp. 81-94.

Bibtex - Download

@article{dbbd24f0f9344485b5c65b33e3f176bb,
title = "Cold-formed RHS T joints with initial geometrical imperfections",
abstract = "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.",
keywords = "Finite element analysis, Hollow section joint, Imperfection, Initial stiffness, Resistance",
author = "M. Garifullin and Bronzova, {M. K.} and M. Heinisuo and K. Mela and S. Pajunen",
year = "2018",
doi = "10.18720/MCE.80.8",
language = "English",
volume = "80",
pages = "81--94",
journal = "Magazine of Civil Engineering",
issn = "2071-0305",
publisher = "Peter the Great St.-Petersburg Polytechnic University",
number = "4",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Cold-formed RHS T joints with initial geometrical imperfections

AU - Garifullin, M.

AU - Bronzova, M. K.

AU - Heinisuo, M.

AU - Mela, K.

AU - Pajunen, S.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - Finite element analysis

KW - Hollow section joint

KW - Imperfection

KW - Initial stiffness

KW - Resistance

U2 - 10.18720/MCE.80.8

DO - 10.18720/MCE.80.8

M3 - Article

VL - 80

SP - 81

EP - 94

JO - Magazine of Civil Engineering

JF - Magazine of Civil Engineering

SN - 2071-0305

IS - 4

ER -