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