Behavior of steel-reinforced concrete-filled square steel tubular stub columns under axial loading

被引：61
作者：
Ding, Fa-xing [1 ]
Zhang, Tao [1 ]
Liu, Xue-mei [2 ]
Lu, Zhao-Hui [1 ]
Guo, Qiang [1 ]
Jiang, Guo-shuai [1 ]
机构：
[1] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
[2] Queensland Univ Technol, Sch Civil Engn & Built Environm, Brisbane, Qld 4000, Australia
来源：
THIN-WALLED STRUCTURES | 2017年 / 119卷
基金：
中国国家自然科学基金;
关键词：
Steel-reinforced concrete-filled square steel tubular (SRCFT); Ultimate bearing capacity; Strain ratio; Composite action; Steel section; TUBE COLUMNS; COMPRESSION; PERFORMANCE; CAPACITY;
D O I：
10.1016/j.tws.2017.07.021
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The objectives of this paper is to investigate the mechanical behavior of steel reinforced concrete-filled square steel tubular (SRCFT) stub columns under axial loading through combined experimental and numerical studies. In total of six specimens are tested to investigate the effect of the concrete strength and steel ratio on the mechanical behavior of SRCFT stub columns. The ultimate bearing capacity, ductility, and confinement effects are discussed and clarified based on the experimental results. The inserted steel section can effectively prevent shear cracks in the core concrete from propagating quickly. The strength-weight-ratio of SRCFT stub column is larger than SCFT stub column. In addition, ABAQUS is used to establish the 3D finite element (FE) model and analyze the composite action of SRCFT stub columns under axial loading. Based on the experimental and numerical results, a simplified formula is proposed to estimate the ultimate bearing capacity of SRCFT stub columns using superposition method. The predicted results show satisfactory agreement with both experimental and FE results.
引用
收藏
页码：737 / 748
页数：12
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