预制混凝土剪力墙结构振动台试验研究

Study on shaking table test of precast concrete shear wall structure

为了研究预制混凝土剪力墙(PCSW)结构的抗震性能,在实验室中建成两个1/4缩尺模型,分别为PCSW结构模型和现浇混凝土剪力墙(CCSW)结构模型.首先介绍了新型装配式剪力墙水平接缝连接技术,然后利用振动台试验对比研究了PCSW结构和CCSW结构动力性能和地震响应.试验结果表明:新型装配式剪力墙水平接缝连接可靠,能够满足罕遇地震下的连接要求.在地震波加载过程中,PCSW结构具有与CCSW结构相似的破坏过程和破坏形态.随着地震波加速度峰值的不断加大,结构损伤的不断累积,PCSW结构和CCSW结构的频率均呈下降趋势,阻尼比均呈增大趋势;顶点的绝对加速度包络值、剪重比、层间位移包络值呈非线性增大趋势.PCSW结构和CCSW结构具有相近的加速度分布、层间位移分布、层间剪力分布、剪重比分布.

In order to investigate seismic properties of precast concrete shear wall （PCSW） structure , two 1/4 scale shaking table tests were designed and conducted ,which were a PCSW structure and a cast‐in‐situ concrete shear wall structure （CCSW） .Firstly ,the new horizontal connection of precast shear wall was proposed and introduced detailedly .Then ,the dynamic properties and structural re‐sponses of the two structures were compared using shaking table test .The experimental results indi‐cate that the new horizontal connection of precast shear wall is useful and effectively ,which can meet the connection requirement under rare earthquake .During the earthquakes ,the PCSW structure and the CCSW structure have similar failure process and failure shapes .With the increase of peak ground accelerations ,damage is accumulated in the two strucutures ,and the frequencies of the PCSW struc‐ture and the CCSW structure decline ,damping ratios of the tw o structures increase;the top storey ab‐solute accelerations ,shear‐weight ratios ,inter‐storey drifts increase nonlinearly .The PCSW structure and the CCSW structure have similar absolute acceleration distribution ,inter‐storey drift distribution , shear force distribution ,and shear‐weight ratio distribution .