双面叠合剪力墙关键问题研究:水平连接节点抗震性能试验

Research on key issues of the double-superimposed shear wall: experimental study on seismic performance of horizontal connections

双面叠合剪力墙水平连接节点是传递竖向荷载和水平剪力的关键部位,其水平节点连接钢筋是"间接搭接"的形式。通过6个双面叠合剪力墙水平连接节点和2个现浇节点在竖向荷载和循环剪切荷载作用下的试验,研究双面叠合剪力墙水平连接节点和现浇节点的滞回特性、位移延性系数、刚度退化、承载力退化以及耗能特性。试验结果表明,双面叠合剪力墙水平连接节点的水平裂缝出现在灌浆层和上下墙体的交界面,双面叠合剪力墙水平连接节点的抗剪承载力和现浇节点较为接近,各项抗震性能指标较为接近。

The horizontal connection for double-superimposed shear wall is an important part utilized to transfer shear and vertical forces, and the indirect overlapping splicing is adopted for the horizontal connection. The hysteretic characteristics, displacement ductility coefficient, stiffness degradation, bearing capacity degeneration and energy dissipation behavior of double-superimposed shear wall horizontal connection and cast-in-place horizontal connection were discussed based on an experimental study on six double-superimposed shear wall horizontal connections and two cast-in-place horizontal connections subjected to the combined actions of reversed cyclic shear loads and vertical loads. The test results show that the shear crack may occur at interfaces between grouting layer and the lower or upper walls, the bearing capacity and seismic performance indicators of the double-superimposed shear wall horizontal connection were close to those of cast-in-place horizontal connection.