两层带新型连接节点预制叠合剪力墙抗震性能试验研究

Experimental study on seismic behavior of two-story precast superimposed shear wall with innovative connection joints

为了研究带新型水平连接节点的预制叠合板式剪力墙结构的抗震性能,设计制作了两片采用新型水平连接节点的两层预制叠合剪力墙和一片作为对比的现浇剪力墙,其中两个预制构件连接形式分别为螺旋箍筋连接和钢板连接方式。对3个构件进行拟静力试验,分析结构的承载力、破坏机理、滞回性能、刚度退化、延性、耗能能力及拼装节点滑移情况等。试验结果表明:所有构件均呈现弯曲破坏特征,预制构件的极限层间位移角大于1/50,滞回曲线饱满,结构承载力接近于现浇剪力墙构件;采用新型连接节点的预制叠合剪力墙连接可靠,传力性能良好,预制构件底部相对滑移较小,整体抗震性能良好。

To study the seismic behavior of precast superimposed reinforced concrete shear wall(SRCSW)with innovative horizontal connection joints,two SRCSW specimens with innovative connection joints and one cast-in-situ concrete shear wall were designed and constructed.Among them,the two SRCSWs are assembled with spiral stirrups confined connection joint and steel plate connection joint respectively.Quasi-static tests are performed on the three specimens to investigate the bearing capacity,failure mechanism,hysteretic performance,stiffness degradation,ductility,energy dissipation capacity and the slippery behavior within the construction joints.The test results indicated that all the test specimens damaged in flexural failure mode,the ultimate story drift ratios of the precast specimens are greater than 1/50,the hysteretic loops are full,and the load bearing capacity is close to that of cast-in-situ specimen.Meanwhile,the SRCSWs with the innovative connection joints exhibit a reliable performance in transferring vertical force,the relative slippage at the wall bottom of the SRCSWs is very small,and the SRCSWs are shown better seismic performance.