装配式混凝土双板短肢剪力墙拟静力试验

Quasi-static test for double-wall precast concrete short-leg shear walls

为综合评价装配式混凝土双板短肢剪力墙的抗震性能,对2个双板装配式和1个现浇的足尺比例短肢剪力墙试件进行了拟静力试验研究,分析了试件的滞回曲线、骨架曲线、位移延性、承载能力、刚度退化和耗能能力.结果表明:3个试件均发生弯曲破坏;构造改进后的双板装配式剪力墙具有良好的整体工作性能;利用连续矩形螺旋箍筋加强U形筋搭接连接范围混凝土的约束作用,能提高双板装配式短肢剪力墙的刚度和承载能力;双板装配式短肢剪力墙具有与现浇剪力墙相近的位移延性和刚度退化,具有良好的耗能能力.

To comprehensively evaluate the seismic behavior of double-wall precast concrete （ DWPC） short-leg shear walls, quasi-static test of two full-scale DWPC short-leg shear walls and one normal cast-in-situ （ CIS） short-leg shear wall were carried out. Systematic analyses were made on hysteretic curves, skeleton curves, displacement ductility, bearing capacity, stiffness degradation and energy dissipation capacity of specimens. The result shows that all specimens fail in bending. The detail improved DWPC short-leg shear walls can work together well. The continuous rectangular spiral stirrups in the range of U-shaped connection steel bars confine the concealed column concrete; also improve the stiffness and bearing capacity of DWPC short-leg shear walls. The displacement ductility, stiffness degradation and energy dissipation capacity of DWPC short-leg shear walls are close to those of CIS short-leg shear wall.