（1 陕西铁路工程职业技术学院， 渭南 714000； 2 西安建筑科技大学土木工程学院， 西安 710055）

［摘要］为研究防屈曲支撑对震后受损框架的加固效果，设计并制作了一榀钢筋混凝土框架（RCF）和一榀震损后经防屈曲支撑加固的框架（BRCF），分别进行拟静力加载，观察试验现象及破坏模式，对比分析两试件的承载力及其退化、刚度、延性、耗能性能等指标。试验结果表明：震后受损框架经防屈曲支撑加固后，极限承载力涨幅为146.7%，初始刚度提高了150%，总耗能量达到了对比试件的4.6倍，并能满足地震下结构大变形的要求，具备良好的抗倒塌能力。

［关键词］防屈曲支撑； 钢筋混凝土框架； 拟静力加载； 震后受损框架； 抗震性能； 加固效果

中图分类号：TU378-4文献标识码：A文章编号：1002-848X(2021)02-0113-06

Experimental study on seismic performance of earthquake-damaged frame strengthened by buckling-restrained bracee

WANG Ting1, YANG Yong2, ZHANG Lei1

（1 Shaanxi Railway Institute, Weinan 714000， China；2 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055， China)

Abstract:In order to study the reinforcement effect of buckling-restrained brace on the post-earthquake damaged frame, two reinforced concrete frame specimens, one undamaged and the other strengthened by buckling-restrained brace(BRB) after earthquake damaged were designed and fabricated, and which were tested under pseudo static loading. Specimens′ yield mechanism, failure mode were observed, parameters including load carrying capacity and degradation, stiffness, ductility and energy-dissipation capacity, were compared and analyzed. The results showed that, after strengthened by BRB, earthquake damaged frame′s ultimate bearing capacity increased by 146.7%, the initial stiffness improved by 150%, the total energy consumption improved to 4.6 times of the comparison specimen. After strengthened by BRB, earthquake-damaged frame structure can meet the requirement of large deformation under earthquake and has good anti-collapse ability. 

Keywords:buckling-restrained brace； reinforced concrete frame； pseudo static loading； earthquake-damaged frame； seismic performance； reinforcement effect

*陕西铁路工程职业技术学院科研基金项目——BRB加固震后框架梁柱节点抗剪设计（KY2016-46）。

作者简介：王婷，硕士,讲师，Email：wangting19900609@163.com。