环筋扣合锚接连接预制剪力墙抗震性能试验研究

对15个混凝土剪力墙试件进行低周反复荷载试验，研究环筋扣合锚接连接预制剪力墙的抗震性能，考察不同连接形式、不同钢筋配置、不同轴压比等参数影响下剪力墙试件的承载力、滞回特性及破坏机理。试件按纵筋直径和混凝土强度等级的不同分为3组，每组包括2个现浇试件（1个为钢筋贯通连接，1个为纵筋搭接连接）和3个采用环筋扣合锚接连接现浇带的预制试件（其中1个为箍筋加密试件）。试验结果表明：预制剪力墙试件与现浇试件的破坏模式一致，均为压弯破坏；箍筋加密预制剪力墙试件的极限位移角在1/82~1/50之间，其承载力、耗能、延性等性能与全预制试件基本相同,环筋扣合锚接连接剪力墙试件具有良好的抗震性能，可以用于装配式剪力墙结构的建造。

Tests on seismic behavior of pre-cast shear walls with annular closed reinforcements

In order to study the seismic behavior of pre-cast reinforced concrete(RC) shear walls with annular closed reinforcements, quasi-static tests of 15 shear wall specimens were carried out. Influence of styles of connection，arrangements of reinforcement and axial compression ratios on bearing capacity，hysteretic characteristics and failure mechanism were studied. According to the diameter of vertical reinforcements and strength grade of concrete, the specimens were divided into three groups. Each group included two cast-in-situ RC wall specimens and three pre-cast wall specimens. The test results indicate that the failure mode of pre-cast wall specimens is the same as that of cast-in-situ wall specimens, i.e., compression-bending mode. The ultimate drift ratios of the pre-cast wall specimens with annular closed reinforcements are 1/82~1/50,and the ultimate lateral bearing capacity, energy-dissipation and ductility performance of them are similar to that of cast-in-situ RC wall specimens. Research shows that pre-cast reinforced concrete shear walls with annular closed reinforcements have good seismic performance and they can be used for prefabricated shear wall structures.