FEM ANALYSIS OF THE HYSTERETIC BEHAVIOR OF INNOVATIVE HYBRID COUPLED WALL SYSTEM BASED ON DISPLACEMENT CONTROLLED MULTI-PIONTS LOADING

Based on the experimental results of hybrid coupled wall system with steel boundary elements,nonlinear finite element analysis was performed to simulate the overall process under cyclic loading with FEM program ABAQUS,in which geometric and material nonlinearities were taken into account. By using Python language,a displacement-controlled loading program was put forward with the given lateral force pattern. The comparison of analytical results with test ones reveals that they agree well in hysteretic curve,skeleton curve and energy dissipation. Based on the proposed model,parametric analysis was carried out to study the effect of coupling ratio,to propose a suitable value in high earthquake intensity area. The results reveal that when the axial compression ratio is equal to 0.2,the innovative system has excellent seismic performance with the coupling ratio of 45% to 60%,and the distribution of plastic hinges is reasonable,so it is suitable to be used in high seismic regions.