基于等效钢筋连接的连梁和剪力墙节点抗震性能研究

Research on Seismic Performance of Coupling Beam and Shear Wall Nodes Based on Equivalent Reinforcement Connections

目的 研究基于等效钢筋连接的连梁和剪力墙节点的抗震性能,为装配式混凝土连梁和剪力墙的连接设计提供依据。方法 采用WCOMD有限元软件建立现浇连梁及装配连梁模型,对比分析二者的受力破坏过程。结果 未考虑连梁端部破坏向墙内扩展时,装配连梁与现浇连梁相比,屈服荷载、峰值荷载和极限荷载分别提高3.98%、15.19%和12.76%,延性和能量耗散系数分别提高3.83%和15.84%;未考虑连梁端部破坏向墙内扩展与考虑连梁端部破坏向墙内扩展的装配连梁相比,屈服荷载、峰值荷载和极限荷载分别提高5.97%、0.84%和3.57%,延性和能量耗散系数分别提高1.07%和23.76%。结论 采用等效钢筋连接连梁和剪力墙的方法具有可行性,且等效钢筋面积比、装配区灌浆长度及装配位置对结构的承载力影响较大。

In order to study the seismic performance of coupling beam and shear wall connected by equivalent reinforcement,and to provide a basis for the connection design of assembled concrete connecting beams and shear walls.Cast-in-place and assembled beams were modeled using the finite element software WCOMD,and the damage processes of both were compared and analyzed.The result shows that without considering the expansion of the end damage of the coupling beam extending into the wall,the assembled beam is 3.98%,15.19% and 12.76% higher in yield,peak and ultimate load than the cast-in-place one,and its ductility and energy dissipation factor are increased by 3.83% and 15.84% respectively.The assembled beam without considering the end damage of the coupling beam extending into the wall is 5.97%,0.84% and 3.57% higher in yield,peak and ultimate load than the assembled one considering this situation,and its ductility and energy dissipation factor are increased by 1.07% and 23.76% respectively.It can be concluded that the method of connecting coupling beam and shear wall by using equivalent reinforcement is practical.The equivalent reinforcement area ratio,the grouting length in the assembly area and the assembly location have a large influence on the load carrying capacity of the structure.