Steel and Composite Structures

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Axial compressive behavior of concrete-filled steel tube columns with stiffeners

  • Liang, Wei (School of Architecture and Environment, Sichuan University) ;
  • Dong, Jiangfeng (School of Architecture and Environment, Sichuan University) ;
  • Wang, Qingyuan (Key Laboratory of Deep Underground Science and Engineering, Ministry of Education, Sichuan University)
  • Received : 2017.11.29
  • Accepted : 2018.09.11
  • Published : 2018.10.25
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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.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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