(1 郑州大学土木工程学院， 郑州 450001；2 河南省建设工程施工图审查中心有限公司， 郑州 450000)

［摘要］结合实际工程项目，提出将新型双阶屈服屈曲约束支撑应用于传统混凝土框架结构。设计一榀缩尺单层单跨双阶屈服屈曲约束支撑混凝土框架结构试件，采用低周往复试验，对双阶屈服屈曲约束支撑在混凝土框架结构中的抗震性能以及二者的协同工作性能进行试验验证。在此基础上，进一步研究双阶屈服屈曲约束支撑在钢筋混凝土框架结构体系中的抗震性能，对双阶屈服屈曲约束支撑框架结构体系进行弹塑性时程分析，并与单阶屈服屈曲约束支撑框架结构体系对比。结果表明，双阶屈服屈曲约束支撑在小震作用下实现第一阶屈服并保持刚度，为结构提供附加阻尼，参与耗能；在中震与大震作用下发生第二阶屈服，持续耗能。与单阶屈服屈曲约束支撑相比，双阶屈服屈曲约束支撑具有更优的抗震性能。 

［关键词］双阶屈服屈曲约束支撑；钢阻尼器；滞回性能；弹塑性时程分析；附加有效阻尼比 

中图分类号：TU375-4 文献标识码：A文章编号：1002-848X(2021)18-0106-06

Research on seismic behavior of concrete frame structure braced with double-level yielding buckling-restrained brace 

ZHANG  Zhe1,  ZHOU  Tongtong1,  DENG  Enfeng1,  BU  Gang2,  LI  Huifeng2 

(1 School of Civil Engineering, Zhengzhou University, Zhengzhou 450001， China；2 Henan Construction Project Construction Map Review Center Co., Ltd., Zhengzhou 450000， China) 

Abstract: Combined with actual engineering projects, it is proposed to apply a new type of double-level yielding buckling-restrained brace to the traditional concrete frame structure. A scaled-down single-layer single-span concrete frame structure specimen braced with double-level yielding buckling-restrained brace was designed. The seismic performance and cooperative working performance of double-level yielding buckling-restrained brace were verified by quasi-static test. Further, the elastic-plastic time history analysis of the double-level yielding buckling-restrained brace concrete frame was carried out to further study the seismic performance of the double-level yielding buckling-restrained braced in the concrete frame structure system. The seismic performance was compared with the single-level yielding buckling-restrained brace concrete frame. The results show that the double-level yielding buckling-restrained brace was able to provide additional damping and dissipate energy under frequent earthquake through first-level yielding, and dissipate energy under moderate and rare earthquake through the second-level yielding. Moreover, the double-level yielding buckling-restrained brace has better seismic performance compared to the single-level yielding buckling-restrained brace.

Keywords:double-level yielding buckling-restrained brace； steel damper； hysteretic behavior； elastic-plastic time-history analysis； additional effective damping ratio

*国家自然科学基金青年科学基金项目（51908511），河南省高等学校重点科研项目（20A560001），中国博士后科学基金面上项目（2019M662532）。

 作者简介：张哲，博士，教授，博士生导师，Email:   zhangzhe_77@163.com； 通信作者：邓恩峰，博士，讲师，硕士生导师，Email: dengenfeng@zzu.edu.cn。