The effect of cross-section geometry on the lateral-torsional behavior of thin-walled beams: Analytical and numerical studies

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU147132" target="_blank" >RIV/00216305:26110/23:PU147132 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0263823123000137" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263823123000137</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tws.2023.110535" target="_blank" >10.1016/j.tws.2023.110535</a>

Result language

angličtina

Original language name

The effect of cross-section geometry on the lateral-torsional behavior of thin-walled beams: Analytical and numerical studies

Original language description

In this paper, the elastic lateral-torsional behavior of simple beams is discussed by presenting a novel analytical solution and performing numerical studies. The motivation of the presented research is the observation that classic analytical prediction and finite element prediction are, typically, significantly different when the second -order nonlinear behavior of beams with initial imperfections is analyzed. To understand and explain the observed differences, a novel analytical model is worked out for the geometrically nonlinear analysis of beams with initial geometric imperfections. The advancement in the presented analytical solution is the explicit consideration of the changing geometry as the load increases. The most important steps of the derivations are summarized, and the resulting formulae are briefly discussed. The derivations are done for general cross -sections, however, the bending is assumed to act in one of the principal planes. Numerical studies are also presented, focusing on mono-symmetric cross-sections. As part of the numerical studies, first, the results of the new analytical formulae are compared to those from shell finite element analysis. The results suggest that the new formulae can capture the most essential elements of the behavior observed in the shell finite element calculations, justifying that the cross-section shape might have a significant effect on the nonlinear lateral-torsional behavior of beams. Then the effect of the lateral-torsional buckling is predicted by calculating buckling reduction factors, using the results of the geometrically nonlinear finite element calculations. The capacity prediction results, again, justify that the cross-section shape, as well as the sign of the assumed geometric imperfection, might have a non-negligible effect on the buckling reduction factors, and on the capacity of the member.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20100 - Civil engineering

Project

<a href="/en/project/FW01010206" target="_blank" >FW01010206: Improved design of thin-walled cold formed steel beams in terms of load carrying capacity and fire resistance</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

THIN-WALLED STRUCTURES

ISSN

0263-8231

e-ISSN

1879-3223

Volume of the periodical

184

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

„“-„“

UT code for WoS article

000960514400001

EID of the result in the Scopus database

2-s2.0-85146434549