短肢剪力墙节点推覆力模拟分析

Simulation Analysis of the Thrust Force of Short-Pier Shear Wall Joints

通过改变短肢剪力墙节点模型的轴压比,利用ANSYS软件对其节点做推覆力分析。通过5组(轴压比分别为:0.1,0.2,0.3,0.4,0.5)节点模拟实验,对比分析各轴压比下节点的耗能性能、刚度退化、裂缝的发展、极限承载力、极限承载力下对应的极限位移、延性等的变化规律。研究结果表明:反向加载时裂缝的发展速度远大于正向加载时裂缝的发展速度;连梁与墙肢交接处为其薄弱环节;轴压比在0.3左右时节点的耗能性质最优,极限承载力、极限位移最大,抗震性能最好。

By changing the axial compression ratio of the model of short-pier shear wall joints,the ANSYS software has been used to analyze the thrust force of the joints.Based on the simulation experiment on 5 groups of nodes(with an axial compression ratio of 0.1,0.2,0.3,0.4,0.5 respectively),a comparative analysis has been made of the change patterns of the energy consumption performance,stiffness degradation,crack development,ultimate bearing capacity,ultimate displacement and ductility of the joints under different axial compression ratios.The research shows that the development speed of cracks under reverse loading is far greater than that under forward loading;the shear wall joint is the weak link of the whole process;the optimal energy dissipation of nodes can be achieved with 0.3 being the axial compression ratio,where the ultimate bearing capacity and the ultimate displacement reach their maximums with the best seismic performance.