张建伟，阚文亮，刘潇，曹万林，陈泽巧
AuthorsHTML:张建伟，阚文亮，刘潇，曹万林，陈泽巧
AuthorsListE:Zhang Jianwei，Kan Wenliang，Liu Xiao，Cao Wanlin，Chen Zeqiao
AuthorsHTMLE:Zhang Jianwei，Kan Wenliang，Liu Xiao，Cao Wanlin，Chen Zeqiao
Unit:北京工业大学城市与工程安全减灾教育部重点实验室，北京 100124
Unit_EngLish:Key Laboratory of Urban and Engineering Security Disaster of China Ministry of Education，Beijing University of Technology，Beijing 100124，China
Abstract_Chinese:为研究配置不同等级高强钢筋的损伤可控高强混凝土叠合柱的抗震与可恢复性能，进行了3根截面尺寸为600mm×600mm的高强混凝土叠合柱在高轴压比条件下的低周反复荷载试验，试件所用钢筋为HRB600级高强钢筋及1200MPa级超高强钢筋，主要设计变化参数为超高强纵筋配置比例及箍筋间距．基于试验对比分析了各试件的破坏形态、滞回性能、承载力、变形能力、刚度退化、耗能能力与震后可恢复性能．结果表明：配置高强钢筋的高强混凝土叠合柱在低周反复荷载作用下呈弯曲破坏形态；提高纵筋中超高强钢筋配置比例能够有效提升高强混凝土叠合柱的变形性能，减轻震后损伤程度；减小箍筋间距在提升高强混凝土叠合柱抗震耗能能力的同时，对其极限变形能力的提高、刚度退化速率的减缓、混凝土裂缝发展的抑制也有一定作用．本文提供了该种叠合柱的承载力简化计算方法，其计算结果与试验结果符合较好．
Abstract_English: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.
Keyword_Chinese:损伤可控；高强钢筋；高强混凝土；叠合柱；滞回性能
Keywords_English:damage controllability；high-strength steel bar；high-strength concrete；steel-tube-reinforced concrete column；hysteretic behavior

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