螺栓连接装配整体式混凝土剪力墙低周反复试验研究

Experimental study of assembled monolithic concrete shear wall with bolted connection under low reversed cyclic loading

开发一种竖向采用螺栓连接、楼板采用大跨度SP叠合板的大开间装配整体式混凝土剪力墙体系。基于3片剪力墙足尺模型的低周反复试验,对结构典型部位(边跨和中跨)螺栓连接装配整体式混凝土剪力墙的抗震性能进行研究。研究结果表明:剪力墙均发生受弯破坏,最终破坏形态为墙体拼缝处受压侧混凝土压碎,竖向钢筋压屈;装配整体式混凝土剪力墙的抗弯承载力与现浇混凝土剪力墙接近,安全系数达到1.35左右;水平接缝的抗剪安全系数达到约2.9;装配整体式混凝土剪力墙的总体延性良好。

This paper proposes a type of large span assembled monolithic concrete shear wall which adopts bolts as vertical connection and large-span SP composite plate as slab. Three full scale shear walls were tested under low reversed cycle loading, and seismic performance of the assembled monolithic concrete shear wall adopting bolted connection in typical parts(interior and exterior) was systematically studied. Test results indicated that shear walls failed by bending, and concrete at the compression side around connection of the shear wall crushed, as well as the vertical reinforcements buckled. Flexural capacity of assembled monolithic concrete shear walls approximated to that of cast-in-place concrete shear wall, and the safety coefficient was about 1.35. Safety factor of shear capacity of the connection was about 2.9. The ductility of assembled monolithic concrete shear wall was demonstrated to be good.