Local-distortional buckling interaction on cold-formed steel lipped channel beams

被引:47
作者
Anbarasu, M. [1 ]
机构
[1] Govt Coll Engn, Dept Civil Engn, Salem 636011, Tamil Nadu, India
关键词
Direct strength method; Distortional buckling; Local buckling; Lipped channel column; Local-distortional interaction; Finite element analysis; DIRECT STRENGTH METHOD; MODE INTERACTION; SECTION; MEMBERS; DESIGN; TESTS;
D O I
10.1016/j.tws.2015.10.003
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper deals with the ultimate strength, post-buckling behaviour and design of cold-formed steel lipped channel beams affected by local-distortional buckling mode interaction, subjected to uniform bending of the major axis. The cross-sectional dimensions and length of the beams were chosen to have almost equal local and distortional critical buckling stresses by using the G(BTUL)-2.0 beta and CUFSM software. The beams are analysed under pinned with warping free end conditions. 12 sections were selected for this study. The selected sections satisfy the geometric limitations for pre-qualified sections in AISIS-100:2007. Elastic buckling and non-linear finite element analyses were carried out using ABAQUS. The results were compared with corresponding results from experiments available in the literature. The numerical parametric study of 60 analyses of different geometries and yield stress values was undertaken. Based on the comparison of ultimate strengths obtained from the finite element analysis and Direct Strength Method (DSM), a design equation is proposed for lipped channel sections which have their elastic local and distortional buckling moments nearly equal. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:351 / 359
页数:9
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