Experimental Study of Hysteretic Behavior of Damage Controllability in Steel-Tube-Reinforced High-Strength Concrete Columns

被引：0
|
作者：
Zhang J. [1 ]
Kan W. [1 ]
Liu X. [1 ]
Cao W. [1 ]
Chen Z. [1 ]
机构：
[1] Key Laboratory of Urban and Engineering Security Disaster of China Ministry of Education, Beijing University of Technology, Beijing
来源：
Zhang, Jianwei (zhangjw@bjut.edu.cn) | 1600年 / Tianjin University卷 / 54期
基金：
国家重点研发计划;
关键词：
Damage controllability; High-strength concrete; High-strength steel bar; Hysteretic behavior; Steel-tube-reinforced concrete column;
D O I：
10.11784/tdxbz202003049
中图分类号：
学科分类号：
摘要：
In this study,we investigated the seismic and resilience behaviors and damage controllability of steel-tube-reinforced high-strength concrete columns with different grades of high-strength steel bars. We conducted cyclic loading tests on three tube-reinforced high-strength concrete columns with a cross-section size of 600mm×600mm at a high axial force ratio. The steel bars used in the test specimens were HRB600 high-strength and 1200MPa ultra-high-strength steel bars. The ultra-high-strength longitudinal reinforcement configuration ratio and the stirrup spacing were the major variations in the design parameters of the test specimens. Based on the test results,we determined the failure mode,hysteretic behavior,bearing capacity,deformation capacity,stiffness degradation,energy dissipation capacity,and post-earthquake resilience behavior of each specimen. The results revealed that the steel-tube-reinforced high-strength concrete columns with the high-strength steel bars exhibited bending failure under cyclic loading. Increasing the ratio of the ultra-high-strength steel bars used in the longitudinal reinforcement could improve the ductility of the steel-tube-reinforced high-strength concrete columns and reduce the degree of damage after earthquake. Reducing the spacing of the stirrups could improve the seismic-energy-dissipation capacity of the steel-tube-reinforced high-strength concrete columns and also improve the ultimate deformation capacity,reduce the stiffness degradation rate,and suppress the development of concrete cracks. We provide a simplified method for calculating the bearing capacity of the steel-tube-reinforced high-strength concrete columns,the results of which show good agreement with the test results. © 2021, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.
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页码：144 / 153
页数：9
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