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Interaction of Local, Flexural-Torsional, and Flexural Buckling in CFS Lipped Angle Compression Members
| 题名： | Interaction of Local, Flexural-Torsional, and Flexural Buckling in CFS Lipped Angle Compression Members |
| 正文语种： | eng |
| 作者： | K. C. Kalam Aswathy;M. V. Anil Kumar |
| 作者单位： | Indian Institute of Technology Palakkad;Indian Institute of Technology Palakkad |
| 关键词： | Cold-formed steel (CFS);Lipped angle (LA);Flexural-torsional buckling (FTB);Local buckling;Buckling interactions |
| 摘要： | Abstract The possible failure modes of cold-formed steel (CFS) lipped angle (LA) compression members are yielding, local, flexural torsional, or flexural buckling, and any possible interaction among these buckling modes. In general, the strength estimated by current design guidelines are conservative for these members when flexural-torsional buckling (FTB) is the first global buckling mode because the postbuckling strength of this mode is not accounted for in the global buckling strength equations. The initial part of this paper reports the results of an experimental and numerical study of CFS-LA members undergoing independent FTB. Modifications are suggested to global buckling strength equations based on these results. Subsequently, the reduction in the ultimate strength from strength corresponding to independent buckling modes for LA members undergoing interaction between buckling modes such as local-flexural torsional, flexural-flexural torsional, local-flexural, and local-flexural torsional-flexural are studied systematically using finite-element analysis results. A simple and more accurate interaction equation that accounts for these interactions among buckling modes in CFS-LA compression members is proposed. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 7 |
| 页码： | 04023072.1-04023072.13 |
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