Out-of-plane buckling resistance of rolled steel H-section beam-columns under unequal end moments

Marian Giżejowski , Zbigniew Stachura , Radosław Szczerba , Marcin Daniel Gajewski

Abstract

A novel analytical model is proposed for establishing design criteria based on the decomposition of the in-plane deformation and out-of-plane stability states. First part of this study considered the in-plane buckling resistance of beam–columns. This study uses the results from Gizejowski et al. [42] to develop an analytical model for the inelastic out-of-plane buckling resistance of beam–columns subjected to a moment gradient. The elastic flexural–torsional buckling solution is combined with the in-plane solution via the generalised Ayrton–Perry model. In order to unify the recommendations for the resistance evaluation of beams, columns, and beam–columns, the model is customised to conform to the standard Eurocode technique of modelling buckling resistance of steel elements in compression or bending about the cross-sectional axis with the greater moment of inertia. As a result, the out-of-plane resistance interaction curves, expressed in dimensionless coordinates, which describe the beam–column flexural–torsional buckling resistance and consider lateral–torsional buckling effects, are obtained. The results of finite element simulations are used for the verification of the developed analytical formulation. Two numerical techniques of imperfection modelling are used: an equivalent geometric imperfection approach with the Maquoi–Rondal generalised initial imperfection and an approach that individually considers geometric and material imperfections. The results obtained from the proposed analytical model and those obtained using the Eurocode design criteria and other recent analytical proposals are compared. Finally, concluding remarks and directions of future studies are also presented.
Author Marian Giżejowski (FCE / ICE)
Marian Giżejowski,,
- The Institute of Civil Engineering
, Zbigniew Stachura (FCE / ICE)
Zbigniew Stachura,,
- The Institute of Civil Engineering
, Radosław Szczerba (FCE / ICE)
Radosław Szczerba,,
- The Institute of Civil Engineering
, Marcin Daniel Gajewski (FCE / ICE)
Marcin Daniel Gajewski,,
- The Institute of Civil Engineering
Journal seriesJournal of Constructional Steel Research, ISSN 0143-974X, (A 35 pkt)
Issue year2019
Vol160
Pages153-168
Publication size in sheets0.75
Keywords in EnglishSteel structures Imperfect beam–columns Out-of-plane resistance FEM nonlinear analysis Eurocodes
ASJC Classification2506 Metals and Alloys; 2211 Mechanics of Materials; 2215 Building and Construction; 2205 Civil and Structural Engineering
DOIDOI:10.1016/j.jcsr.2019.05.016
URL https://www.sciencedirect.com/science/article/pii/S0143974X19301798
Languageen angielski
File
1-s2.0-S0143974X19301798-main.pdf 1.08 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 07-08-2019, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.969; WoS Impact Factor: 2017 = 2.509 (2) - 2017=2.892 (5)
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