钢筋锚固长度对钢管混凝土节点抗震性能影响试验研究  

EXPERIMENTAL RESEARCH ON INFLUENCE OF ANCHORAGE LENGTH ON THE SEISMIC BEHAVIOR OF CONCRETE-FILLED STEEL TUBE JOINTS

作　　者：兰坤昌 张春涛[1] 王汝恒[1] LAN Kunchang;ZHANG Chuntao;WANG Ruheng(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学土木工程与建筑学院

出　　处：《工业建筑》2018年第8期181-189,共9页Industrial Construction

基　　金：“十二五”农村领域国家科技支撑计划课题(2015BAL03B03)

摘　　要：节点的连接性能在建筑的抗震性能中发挥关键作用,强调了＂强节点,强锚固＂。通过对以混凝土作为节点连接方式的钢管混凝土节点进行拟静力试验,对比3组（每组2个试件）不同钢筋锚固长度的钢管混凝土节点的滞回性能,研究节点内部钢筋锚固长度对节点抗震性能的影响,分析对比相应的抗震性能指标。结果表明：以混凝土作为连接的钢管混凝土节点抗震性能随锚固长度的增加呈非线性增长,在低锚固长度时,增大节点锚固长度对抗震性能的提升效果大于增加截面所带来的效果;在高锚固长度时,锚固长度的增长对节点抗震性能提升需要适合的截面大小来体现。The connection performance of the joint plays a key role in the seismic behavior of the building,and the current construction seismic code also emphasizes ＂strong joint and strong anchoring＂. Through the quasi-static test of concrete steel tube joint that connection with concrete,the hysteretic behavior of three groups（each group of two specimens） concrete-filled steel tube joints with different reinforcement anchorage lengths were compared,the influence of internal steel bar anchoring length on joint seismic behavior was studied,and the corresponding seismic performance indicators were analyzed. The experimental results showed that seismic behavior of concrete-filled steel tube joint with connection by concrete showed a nonlinear increase. When the anchorage length was short,the effect of increasing the anchorage length of the joint was greater than increasing the cross-section; when the anchorage length was long,the promotion of seismic behavior by increasing anchorage length need a suitable cross-section.

关 键 词：钢管混凝土节点 锚固长度 拟静力试验 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9