摘要
通过对一榀缩尺比例1∶2的单跨三层钢筋混凝土框架进行拟静力试验,并在待试验水平荷载下降到85%以后,在原框架每层分别设置单斜撑布置的防屈曲支撑,以模拟震后加固试件。对加固后的框架再次进行拟静力试验,以考察防屈曲支撑加固震后框架的抗震性能。结合试验研究结果,对比分析了震前纯钢筋混凝土框架和震后采用防屈曲钢支撑加固框架的承载力、刚度、延性、强度退化、刚度退化、滞回曲线、骨架曲线等系列抗震性能指标,验证了防屈曲支撑加固震后钢筋混凝土框架的可行性。
This paper studied the test of reinforced concrete frame of single span and three stories scaling 1∶ 2 using low reversed cyclic loading pseudo-static method. When the force descended to 85% of the ultimate force,the buckling-restrained brace was adopted in every story of the frame. The low-cyclic pseudo static test was conducted again in order to learn the seismic performance of the frame to navigate the seismic performance after retrofit. For the unreinforced and reinforced specimen, a series of seismic performance indexes such as the bearing capacity,stiffness,ductility,energy dissipation capacity and the strain at the key points,were detailed analyzed and contrasted and the feasibility of retrofit of BRB was verified.
出处
《工业建筑》
CSCD
北大核心
2016年第4期18-25,共8页
Industrial Construction
基金
陕西省教育厅科技计划项目(14JF014)
柳州欧维姆工程机械有限公司科技项目
陕西省重点科技创新团队计划(2014kct-31)
关键词
防屈曲支撑
中心支撑
偏心支撑
钢筋混凝土框架
加固
抗震性能
buckling-restrained braces（BRB）
concentric brace
eccentric brace
reinforced-concrete frames
retrofitting
seismic performance
