绕丝加固预损钢筋混凝土柱的抗震性能试验研究  

Seismic performance experimental study of spiral hoops strengthened steel reinforced concrete column with pre-damage

作　　者：司建辉[1] 赵侃 尹太龙 刘茂社[1] 田建勃[1] SI Jian-hui;ZHAO Kan;YIN Tai-long;LIU Mao-she;TIAN Jian-bo(School of Civil Engineering and Architecture,Xi＇an University of Technology, Xi＇an 710048, China)

机构地区：[1]西安理工大学土木建筑工程学院

出　　处：《实验力学》2018年第3期442-450,共9页Journal of Experimental Mechanics

基　　金：国家自然科学基金资助项目(51608441,51308455);陕西省自然科学基础研究计划资助项目(2017JQ5032);陕西省高校科协青年人才托举计划项目(20170513);西安理工大学科技创新计划项目2015CX019

摘　　要：对4根钢筋混凝土柱进行了模拟地震的预损伤、预损伤后绕丝加固和加固后的低周往复荷载破坏试验,研究了绕丝加固地震损伤钢筋混凝土柱的抗震性能。根据试验数据分析了试件的承载力、延性性能、刚度退化及耗能能力。试验结果表明：经过绕丝加固修复后的预损伤试件,其延性性能和极限位移得到了明显提高;钢筋混凝土柱的预损伤程度对预损伤后的加固效果有重要影响。在轻度损伤程度情况下,绕丝加固柱恢复并超过受损前的抗震性能;预损伤越大的柱经绕丝加固后其延性、耗能能力、刚度和承载力越小。In this paper,low cycle repeated loading destructive experiment was carried out for 4 spiral hoops strengthened steel reinforced concrete columns with pre-damage to study their seismic performance.Based on experimental data,the bearing capacity,ductility,stiffness degradation,and energy dissipation capacity of specimen were analyzed systematically.Experimental results show that after spiral hoops strengthening,both ductility and ultimate displacement are improved obviously;the pre-damage degree has important influence on strengthening effect of steel reinforced concrete column.In the case of mild pre-damage,the seismic performance of spiral hoops strengthened column not only restores but also exceeds that of column without pre-damage.In the case of severe pre-damage,the ductility,energy dissipation capacity,stiffness and bearing capacity of spiral hoops strengthened column are degraded.

关 键 词：钢筋混凝土柱 绕丝加固 低周反复荷载 预损伤 抗震性能 

分 类 号：TU375[建筑科学—结构工程]