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

作者：Wei Liang, Jiangfeng Dong, Qingyuan Wang · 发表于：Steel and Composite Structures · 年份：2018 · DOI：10.12989/scs.2018.29.2.151 · 被引用次数：10 · 研究领域：Structural Load-Bearing Analysis、Structural Behavior of Reinforced Concrete、Structural Engineering and Vibration Analysis

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.