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Steel and Composite Structures Volume 50, Number 6, March 25 2024 , pages 675-688 DOI: https://doi.org/10.12989/scs.2024.50.6.675 |
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Distortional buckling performance of cold-formed steel lightweight concrete composite columns |
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Yanchun Li, Aihong Han, Ruibo Li, Jihao Chen, Yanfen Xie and Jiaojiao Chen
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| Abstract | ||
| Cold-formed steel (CFS) is prone to buckling failure under loading. Lightweight concrete (LC) made of lightweight aggregate has light weight and excellent thermal insulation performance. However, concrete is brittle in nature which is why different materials have been used to improve this inherent behavior of concrete. The distortional buckling (DB) performance of cold-formed steel-lightweight concrete (CFS-LC) composite columns was investigated in this paper. Firstly, the compressive strength test of foam concrete (FC) and ceramsite concrete (CC) was carried out. The performance of the CFS-LC members was investigated. The test results indicated that the concrete-filled can effectively control the DB of the members. Secondly, finite element (FE) models of each test specimen were developed and validated with the experimental tests followed by extensive parametric studies using numerical analysis based on the validated FE models. The results show that the thickness of the steel and the strength of the concrete-filled were the main factors on the DB and bearing capacity of the members. Finally, the bearing capacity of the test specimens was calculated by using current codes. The results showed that the design results of the AIJ-1997 specification were closer to the experimental and FE values, while other results of specifications were conservative. | ||
| Key Words | ||
| bearing capacity; cold-formed steel lightweight-concrete composite column; distortional buckling; experiment; numerical simulation | ||
| Address | ||
| Yanchun Li, Aihong Han, , Jihao Chen, Yanfen Xie and Jiaojiao Chen:School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China Ruibo Li:Yuxing Construction Company, Zhengzhou 450011, China | ||