Axial compression performance of thin-walled concrete-filled square steel tube short columns confined by stirrup

被引：0
|
作者：
Chen J. [1 ]
Ni J.-G. [1 ]
Liu Z. [1 ]
Ma W.-B. [1 ]
Deng X.-H. [1 ]
机构：
[1] College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 01期
关键词：
calculation formula; concrete-filled steel tube; high-strength steel; stirrup confined; thin-walled steel tube;
D O I：
10.13229/j.cnki.jdxbgxb20210559
中图分类号：
学科分类号：
摘要：
Through the axial compression test of the thin-walled concrete-filled square steel tube short column confined by the stirrup，the effects of the concrete strength，the volumetric stirrup ratio of the stirrup and the connection mode of the stirrup and the steel pipe wall on the ultimate bearing capacity，stiffness，ductility and transverse deformation coefficient of the specimen are studied. The research results show that the built-in reinforcement can help to improve the ultimate bearing capacity and ductility of the specimen. This improvement effect decreases with the increase of concrete strength，and increases with the increase of the volumetric stirrup ratio of the stirrup. After the stirrup is welded to the steel pipe wall，the mechanical properties of the test piece have not changed significantly. The ultimate strength theory is used to mechanically analyze the specimens in the ultimate state，and the formula for calculating the ultimate bearing capacity of the concrete-filled square steel tube short columns constrained by stirrup is deduced，and combined with the test data of similar specimens in other documents to verify the formula，which proves the correctness of the formula. © 2023 Editorial Board of Jilin University. All rights reserved.
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页码：170 / 177
页数：7
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