Abstract:To improve the accuracy of analyses of the seismic performances of shear walls, in this study, we took the shear wall in a high-rise building as the engineering background. We then combined the static elastoplastic analysis method with the energy-equivalent criterion to determine the trilinear restoring force parameters of the shear wall structure along the direction of the two principal axes. Based on the parameters, we established a close layer model of the shear wall. Then, we simulated the shear wall of the building using a three-dimensional finite element model, and simulated the its dynamic time histories. The results show that with increases in the earthquake magnitude and the number of building floors, the enveloping value of the story and vertex drift angles of the shear wall obviously increase. The correct setting of the viscous fluid damper can improve the seismic response of the building shear wall. Under rare magnitude-9.0 earthquakes, the damping effect on the shear wall structure in the X direction is better than that in the Y direction. The maximum damping of the story drift ratio of a shear wall structure in the X direction is about 38%, and that in the Y direction is about 18%.