带接缝连接梁的预制混凝土剪力墙抗震性能试验研究

采用钢筋混凝土接缝连接梁来实现预制墙体竖向钢筋的连续性连接。通过6个高宽比为1.7、不同截面高度和位置的接缝连接梁预制混凝土剪力墙的低周反复加载试验，分析了试件的破坏形态、顶点荷载-位移滞回曲线、承载力、变形能力、刚度退化等特性，并与整体现浇墙体进行对比。试验结果表明：预制墙体试件与整体现浇墙体试件的破坏模式、破坏形态基本相同，均为墙体角部混凝土压碎、钢筋拉断或屈曲；预制墙体试件的水平承载力相当，略低于现浇墙体，接缝连接梁的位置及截面高度对承载力有一定程度的影响；预制墙体试件的变形能力略小于现浇墙体试件，但极限位移角均超过1/100；接缝连接梁可以有效传递荷载。

Experimental study on seismic performance of precast concrete shear walls with joint connecting beam

Joint connecting beam is adopted as an alternative to connect vertical reinforcements of precast concrete wall. Quasi-static tests of six precast concrete shear walls with an aspect ratio of 1.7 having joint connecting beam with different height and different location were presented in the paper. The destruction of specimens, the top lateral force-displacement hysteretic curve, lateral bearing capacity, deformation, stiffness degradation, etc. were analyzed and comparisons were made with those of monolithic shear wall. Test results show that the failure mode of precast concrete shear wall specimens is nearly the same as that of monolithic shear wall, i.e., crushing of concrete at the wall bottom and tensile yield or bucking of vertical reinforcements in the boundary elements. Lateral bearing capacity of precast concrete shear wall with joint connecting beam is a little smaller than that of monolithic shear wall because of height and location of joint connecting beam; deformability of precast concrete shear wall specimens with joint connecting beam is a little smaller than that of the monolithic shear wall specimen, yet with ultimate drift ratio all exceeding 1/100. Loads can be effectively transferred by joint connecting beam.