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Steel and Composite Structures Volume 29, Number 2, October25 2018 , pages 151-159 DOI: https://doi.org/10.12989/scs.2018.29.2.151 |
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Axial compressive behavior of concrete-filled steel tube columns with stiffeners |
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Wei Liang, Jiangfeng Dong and Qingyuan Wang
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| Abstract | ||
| In order to reduce the deformation and delay the local buckling of concrete filled steel tube (CFST) columns, strengthening the structures with stiffeners is an effective method. In this paper, a new stiffening method with inclined stiffeners was used to investigate the behaviors of short CFST columns under axial compression. Besides, a three-dimensional nonlinear finite element (FE) model was applied to simulate the mechanical performances, including the total deformation, local buckling, and stress-strain relationship. Revised constitutive models of stiffened steel tube and confined concrete are proposed. A good agreement was achieved between the test and FE results. Furthermore, the calculated results of load capacity by using a simplified method also show a good correlation with experimental data. | ||
| Key Words | ||
| concrete filled steel tube (CFST) columns; self-compacting concrete (SCC); stiffening; axial compression; finite element analysis | ||
| Address | ||
| (1) Wei Liang, Jiangfeng Dong: School of Architecture and Environment, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China; (2) Wei Liang, Qingyuan Wang: Key Laboratory of Deep Underground Science and Engineering, Ministry of Education, Sichuan University, Chengdu, 610065, China\' (3) Jiangfeng Dong: Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, China; (4) Qingyuan Wang: State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China. | ||