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首页> 外文期刊>International journal of steel structures >Distortional–Global Interactive Buckling of Thin-Walled Columns with Complex Lips
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Distortional–Global Interactive Buckling of Thin-Walled Columns with Complex Lips

机译：Distortional–Global Interactive Buckling of Thin-Walled Columns with Complex Lips

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Abstract When the interaction of buckling modes in thin-walled steel columns are considered, most of the existing research deals with local–distortional mode or local–global mode interaction. The studies available on compression members undergoing distortional–global buckling mode interaction is comparatively less. This study analyses the behaviour of cold-formed thin-walled compression members having complex lips under axial compression and undergoing interaction of distortional–global buckling (D–G) modes. Finite element analytical (FEA) study is performed on members with complex lips for a range of geometries after validating the finite element model with existing experimental results. Member dimensions are selected based on elastic buckling analysis results such that the member fails predominantly in D–G interaction. Comparison of nonlinear finite element results are made with; (1) direct strength method (DSM) for the design of compression members, and (2) modified DSM for columns considering the interaction of buckling modes proposed in the literature. Modifications are proposed for the existing DSM expression to incorporate the D–G interaction, which provides a closer comparison with FEA results.

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