再生混凝土框架边节点抗震性能试验研究  

Experimental study of seismic behavior of side joints in recycled concrete frame

作　　者：王晓菡[1,2] 柳炳康[1] 胡波[1] 吴童[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]江南大学环境与土木工程学院,江苏无锡214122

出　　处：《合肥工业大学学报（自然科学版）》2012年第10期1370-1374,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(090414163);江南大学环境与土木工程学院院长基金资助项目(yzjj1101)

摘　　要：通过2榀再生混凝土框架边节点试件在低周反复荷载作用下的试验,了解了再生混凝土框架边节点核心区剪切破坏和梁端弯曲破坏形态;得到反复荷载作用下节点核心区箍筋和梁端纵筋荷载-应变滞回曲线,以及核心区箍筋应力随荷载变化规律,运用ABAQUS软件建立了节点有限元模型,采用正反向单调加载的方法近似模拟试件的受力状况,2榀试件的混凝土以及钢筋应力数值计算结果与试验实测结果吻合较好,梁端极限荷载计算值与试验值相差在1.3%～10.3%之间。A test was conducted on the seismic behavior of two recycled concrete side joints under low frequency reversed load. Two failure patterns including core shear failure and the beam end flexural failure were investigated respectively. The hysteretic curves of load-strain of stirrup in the core of the joint and the longitudinal reinforcement at the beam end were acquired. The changing pattern of the stress of the stirrup in the core with the load is analyzed. The finite element model of the joints is es- tablished by ABAQUS software and the stress of these specimens is approximately simulated by using the method of forward and reverse monotonic loading. The calculated results of concrete and rein- forcement stress of the specimens agree well with the test results. The difference of the ultimate load at the beam end between the calculation and the test is within 1.3%-10. 3%.

关 键 词：再生混凝土 框架边节点 核心区 钢筋应变 

分 类 号：TU375.1[建筑科学—结构工程]