摘要
为了研究双向地震作用下屈曲约束支撑(Buckling-restrained brace,BRB)钢筋混凝土框架平面内抗震性能以及BRB与钢筋混凝土框架在平面外方向的相互作用,考虑框架平面外变形、节点板平面外刚度和屈曲约束支撑外伸段平面外刚度的影响,对4个钢板装配式屈曲约束支撑钢筋混凝土框架及1个钢筋混凝土空框架进行了平面内拟静力试验研究。研究结果表明:(1)耦合框架平面外变形的BRB钢筋混凝土框架和无框架平面外变形的BRB钢筋混凝土框架平面内层间剪力与层间位移滞回曲线饱满稳定,具有良好的抗震性能;(2)框架平面外变形在一定程度上减小了钢板装配式BRB钢筋混凝土框架平面内初始水平刚度和承载力,增大了钢板装配式BRB和节点板平面外变形量;(3)节点板面外刚度的提高增加了框架节点平面外作用力;(4)钢板装配式BRB面外刚度的增加能减小自身平面外变形,减小其对钢筋混凝土框架平面外作用力。
To study the in-plane seismic performance of reinforced concrete(RC)frame with steel-plate assembled buckling-restrained brace(BRB)and the interaction between BRB and RC frame in out-of-plane direction under bi-directional earthquake,quasi-static tests were conducted on four RC frames with steel-plate assembled BRB and one RC frames without steel-plate assembled BRB.The influence of the out-of-plane deformation of frames,the out-of-plane bending stiffness of gusset plates,and the out-of-plane stiffness of the BRB extension section were considered.It is found that the storey shear force and storey drift hysteresis curves of the RC frames with steel-plate assembled BRB are plump and stable with or without the influence of bi-directional seismic action,implying a good seismic performance.The out-of-plane deformation of frames reduced the in-plane initial horizontal stiffness and load-bearing capacity of the RC frames with steel-plate assembled BRB,but increased the out-of-plane deformation of the steel-plate assembled BRB.The increase of the out-of-plane bending stiffness of gusset plates increased the out-of-plane force on the frame;The increase of out-of-plane bending stiffness of the BRB extension section reduced its out-of-plane deformation,but decreased the out-of-plane force of the BRB to the RC frame.
作者
钟根全
周云
龚晨
陈清祥
Zhong Genquan;Zhou Yun;Gong Chen;Chen Qingxiang(Guangzhou University,Guangzhou 510006,China;Guangdong University of Technology,Guangzhou 510006,China;Shanghai Unite Building Engineering Consulting Co.,Ltd.,Shanghai 200086,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2019年第7期81-89,99,共10页
China Civil Engineering Journal
基金
国家重点研发计划(2017YFC0703600)
广东工业大学校青年基金(15ZK0029)
关键词
屈曲约束支撑
钢筋混凝土框架
平面外变形
拟静力试验
抗震性能
buckling-restrained brace
reinforced concrete frame
out-of-plane deformation
quasi-static test
seismic performance
