摘要
为研究Y型偏心支撑加固弱柱RC框架的滞回性能,进行了2榀、1/3缩尺的Y型偏心钢支撑加固RC框架的低周往复加载试验,其中1榀试件的RC框架为强梁弱柱型,另外1榀对比试件为强柱弱梁型。重点研究采用Y型偏心钢支撑加固强、弱柱RC框架结构的破坏过程及破坏特征,分析了两类加固框架的滞回性能、延性、刚度退化、耗能等抗震性能。试验结果表明采用Y型偏心钢支撑加固弱柱框架后,仍可获得较高的水平承载力、抗侧刚度,以及良好的变形和耗能能力。
In order to investigate the hysteretic behavior of RC frames with weak columns retrofitted by Y-shaped eccentrical brace,two one-bay,one-story test specimens on one-third scale were made and tested under low reversed cyclic loading.One of the specimens is an RC frame with strong columns retrofitted by Y-shaped eccentrical brace,the other is an RC frame with weak columns retrofitted by Y-shaped eccentrical brace.The failure process and characteristics of the specimens were mainly studied on the basis of the RC frames with strong or weak columns retrofitted by Y-shaped eccentrical brace.Hysteretic behavior,ductility,stiffness degradation,and energy-dissipation of specimens were analyzed.Test results show that the RC frame with weak columns retrofitted by Y-shaped eccentrical brace still has great lateral bearing capacity,large lateral stiffness,high ductility and remarkable energydissipation capacity.
出处
《地震工程与工程振动》
CSCD
北大核心
2014年第3期142-150,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51078248)
关键词
Y型偏心支撑
RC框架
强梁弱柱
滞回性能
低周往复加载试验
Y-shaped eccentrical brace
RC frame
strong beam-weak column
hysteretic behavior
low reversed cyclic test
