- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
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| Citation: | YAO Xingyou, HU Chengli, LIU Yafei, GUO Yanli. Axial Compression Test and Bearing Capacity Design Method of Cold-Formed Steel with Unequal-Leg Lipped Angles[J]. Journal of Southwest Jiaotong University, 2025, 60(1): 93-102. doi: 10.3969/j.issn.0258-2724.20230010
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To study the buckling performance and bearing capacity design method of the cold-formed thin-walled steel (CFTWS) with unequal-leg lipped angles under axial compression, the tests were conducted, and a finite element program was used to analyze the buckling performance and ultimate bearing capacity. Based on the direct strength method, the bearing capacity design method was presented. Firstly, the 32 CFTWS with unequal-leg lipped angles with different sections, slenderness ratios, and width-to-thickness ratios were tested under axial compression. Then, ABAQUS finite element software was used to perform parametric analysis on the buckling performance and bearing capacity of CFTWS with unequal-leg lipped angles with different width-to-thickness ratios, width ratios of legs, and slenderness ratios. Finally, the modified direct strength method for calculating the bearing capacity of CFTWS with unequal-leg lipped angles under axial compression was proposed based on the results of the test and finite element analysis. The results show that the specimens with a small width-to-thickness ratio are prone to flexural-torsional buckling, while the specimens with a large width-to-thickness ratio are prone to the local buckling or buckling related to flexural-torsional buckling and local buckling. The ultimate bearing capacity of the specimens decreases with the increase in the slenderness ratio, and the increase amplitude of the bearing capacity slows down with the increase in the width-to-thickness ratio. The reliability analysis shows that the reliability indexes of the bearing capacity of the CFTWS with unequal-leg lipped angles under axial compression calculated using the modified direct strength method are greater than 3.2, indicating that the proposed method is accurate and reliable.
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Figures(16) / Tables(4)
YAO Xingyou, HU Chengli, LIU Yafei, GUO Yanli. Axial Compression Test and Bearing Capacity Design Method of Cold-Formed Steel with Unequal-Leg Lipped Angles[J]. Journal of Southwest Jiaotong University, 2025, 60(1): 93-102. doi: 10.3969/j.issn.0258-2724.20230010
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