低周往复荷载下板柱中节点抗震性能研究  

Investigation on seismic performance of interior slab-column connections subjected to reversed cyclic loading

作　　者：唐明[1] 易伟建[1] 刘力维 TANG Ming;YI Weijian;LIU Liwei(College of Civil Engineering,Hunan University,Changsha 410082,China;China Railway Eryuan Engineering Group CO. LTD,Chengdu 610031,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《地震工程与工程振动》2019年第3期109-121,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51338004,51178175)~~

摘　　要：完成了4个无抗冲切钢筋的板柱中节点的抗震试验,通过改变重剪比与板配筋率,系统地研究了板柱中节点在地震作用下的承载力、变形能力、耗能能力以及破坏形态等抗震性能的变化规律。试验结果表明:板柱中节点重剪比与不平衡弯矩承载力线性负相关;重剪比大小是影响板柱节点破坏模式的主要因素,而板配筋率变化对板柱节点破坏模式的影响不明显;在地震作用下,冲切锥斜截面与水平面的夹角小于中国规范规定值,夹角大小不受重剪比变化的影响。结合历史试验数据和本文试验数据,对比分析了中美欧三国规范计算方法的合理性,中美两国规范计算结果整体偏于安全,欧洲规范计算结果更接近试验值。The seismic experiments of four interior slab-column connections without shear reinforcement were conducted.By changing the gravity-shear ratio and slab’s reinforcement ratio,the change rules of seismic performance were investigated systematically under the earthquake actions,including unbalanced moment,deformation capacity,energy dissipation capacity,stiffness property and failure mode.The test results showed that the correlation between gravity-shear ratio and unbalanced moment is negative.And the failure mode of slab-column connections was mainly affected by gravity-shear ratio,however,tension reinforcement ratio had no obvious influence on it.Moreover,under earthquake,the angle between punching cone’s inclined section and horizontal plane was less than the specified value in Chinese code,but the angle was independent of the gravity-shear ratio.Based on the previous test data and experimental results,the rationality of the calculated methods in Chinese code,American code and European code were analyzed.The calculated results of Chinese code and American code were conservative,meanwhile,the calculation of the European code was in highly agreement with the experimental values.

关 键 词：板柱节点 往复荷载 冲切破坏 重剪比 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]