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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 study the seismic behavior of precast concrete shear wall (PCSW) structures, two 1/4-scale models are built in the laboratory, which are the structural model of PCSW and the structural model of cast-in-place concrete shear wall (CCSW) The new type of horizontal shear connection technology of the assembled shear wall is used to analyze the dynamic performance and the seismic response of the PCSW structure and the CCSW structure by using the shaking table test.The experimental results show that the horizontal seam connection of the new type of assembled shear wall is reliable and can meet the requirements of rarely In case of seismic wave loading, the PCSW structure has similar failure process and failure mode as the CCSW structure.With the increasing of the peak acceleration of seismic wave, the continuous accumulation of structural damage, the frequency of the PCSW structure and the CCSW structure Both showed a downward trend and a large increase in damping ratio. The absolute acceleration envelope value, shear weight ratio, and interlayer displacement envelope of the vertexes tended to increase nonlinearly. The PCSW structure and the CCSW structure have similar acceleration distributions, Displacement distribution, Shear distribution, Shear weight ratio distribution.