高强螺栓连接装配式混凝土剪力墙抗震性能试验研究

Experimental study on seismic performance of prefabricated concrete shear walls connected by high⁃strength bolts

提出一种用于装配式剪力墙结构的螺栓连接的干式连接方法,即预制墙板上预埋钢件,上、下层墙体通过高强螺栓和预埋钢件进行连接。为研究高强螺栓连接装配式混凝土剪力墙的抗震性能,对1个现浇试件和2个高强螺栓连接试件进行拟静力试验,对试件的破坏特征、滞回性能、变形能力、承载能力、耗能能力及延性等进行分析。结果表明:高强螺栓连接装配式剪力墙有效实现了剪力墙构件的工作机制,滞回曲线饱满,耗能能力较强,抗震性能良好。现浇试件RCSW、钢筋焊接试件DCSW1、钢筋环绕型试件DCSW2的极限位移角分别达到了1/60、1/60和1/41;钢筋焊接试件DCSW1的裂缝开展形态、受力性能及破坏形态与现浇试件RCSW相似,耗能曲线基本一致,耗能能力接近;钢筋环绕型试件DCSW2的屈服荷载、峰值荷载和极限荷载均小于RCSW和DCSW1,墙体塑性变形偏小,耗能能力偏低。

A dry connection method for bolt connection of prefabricated concrete shear wall structure was proposed,embedded steel parts in prefabricated wall panels,the upper and lower walls are connected by high-strength bolts and embedded steel parts.In order to study the seismic performance of prefabricated concrete shear walls connected by high-strength bolts,a pseudo-static test was carried out on a cast-in-place specimen and two high-strength bolt connection test specimen,the failure characteristics,hysteresis performance,deformation capacity,bearing capacity,energy dissipation capacity and ductility of the specimen were analyzed.The result shows that high-strength bolt connection fabricated shear wall effectively realizes the working mechanism of shear wall components,it has full hysteresis curve,strong energy consumption and good seismic performance.The ultimate displacements of the cast-in-place specimen RCSW、the steel bar welding specimen DCSW1、the steel-encircled specimen DCSW2 reached 1/60,1/60 and 1/41.The crack development pattern,stress performance and failure pattern of the steel bar welding specimen DCSW1 are similar to those of the cast-in-place specimen RCSW,the energy consumption curve is basically the same,and the energy consumption capacity is close;The yield load,peak load and ultimate load of the steel-encircled specimen DCSW2 are all smaller than RCSW and DCSW1,the wall plastic deformation is relatively small,and the energy dissipation capacity is relatively low.