不同约束边缘构件高强混凝土剪力墙抗震性能试验对比研究OA

To improve the seismic performance of high-strength concrete shear walls,three kinds of specimens were designed,including edge column confined high-strength concrete shear wall(DHSCW),edge steel confined high-strength concrete shear wall(SHSCW)and edge concealed column confined high-strength concrete shear wall(RHSCW).The quasi-static test was carried out to study the failure mechanism,bearing capacity,ductility,stiffness degradation and energy dissipation performance of these three specimens.The results show that the damage degree of DHSCW is lighter,SHSCW is the second,and RHSCW is heavier.The average bearing capacity ratio of DHSCW,SHSCW and RHSCW at each load characteristic point is 1.69∶1.18∶1;after yielding,the stiffness degradation rate of DHSCW is slower,followed by SHSCW,and RHSCW is faster.Under the same shear span ratio,the average displacement ductility coefficient ratio of the three types high-strength stirrup high-strength concrete shear walls is 1.55∶1.28∶1,and the average cumulative energy dissipation ratio is 4.19∶3.12∶1.The bearing capacity and energy dissipation performance of the wall can be effectively improved by using end columns and steel as constraint edge members at both ends of the shear wall section.At the same time,the constraint effect of setting end columns is more significant than that of configuring steel,and the improvement of seismic performance of shear walls is more significant.