屈曲约束支撑应用于钢筋混凝土框架加固改造项目的减震效果分析  

Shock Absorption Effect Analysis of Buckling Restrained Brace Applied to Reinforced Concrete Frame

作　　者：徐斌 陈爱军 陈志平 任凯 

机构地区：[1]中国中元国际工程有限公司,北京100048

出　　处：《工程抗震与加固改造》2016年第3期118-123,共6页Earthquake Resistant Engineering and Retrofitting

摘　　要：将屈曲约束支撑应用于钢筋混凝土框架加固改造项目。根据原结构地震动响应特性,选取变形不利位置布置支撑,分别进行多遇地震下的反应谱法计算和罕遇地震下的动力时程分析。结果显示,屈曲约束支撑在小震下保持弹性状态,大震下进入屈曲滞回状态,布置支撑后,结构的扭转特性得到明显改善,层间位移角满足规范要求,而且显著减少了加固工程量,体现出良好的耗能减震效果。The buckling restrained brace is applied to the reinforced concrete frame strengthening and rebuilding project. According to the seismic response of the original structure,the seismic response spectrum method in multi event earthquake and the dynamic time history analysis in the rare earthquake are carried out. The results show that the buckling restrained brace maintains elastic state under small earthquake,and in buckling hysteretic state in rare earthquake. Torsion property of the RC frame with buckling-restrained braces improves distinctly,the story drift angle meets the standard requirements,moreover,it significantly reduces the amount of reinforcement engineering,which reflects the good energy dissipation effect.

关 键 词：屈曲约束支撑 加固改造 消能减震 时程分析 楼层侧向刚度 

分 类 号：TU375.4[建筑科学—结构工程] TU352.1