Energy dissipation effects of viscous damping walls in high-rise shear wall structures located in high-intensity earthquake areas

A high-rise residential building with a shear wall structure system containing viscous damping walls and located in a high-intensity earthquake area was studied. The seismic performance target of the high-rise shear wall structure was proposed based on the performance-based seismic design method. The damping effect and seismic performance of the shear wall structures using viscous damping walls under frequent earthquake and rare earthquake action were studied by using elastic time history analysis and elastic-plastic time history analysis. Moreover, a performance design of the energy dissipation substructure was carried out. The results indicated that the drift angle of the energy dissipation structure satisfied the requirements of the specification limit. Most of the walls of the structure were only slightly damaged, while only the bottom part of the walls was in the moderate damage category, indicating that the seismic performance of the shear wall structure could be effectively improved by using viscous damping walls. The base shear of the energy dissipation structure was reduced by 12~28%, and the viscous damping walls could provide an additional damping ratio of 2.5~4.77% under frequent earthquake action. The hysteretic energy dissipation effect was obvious under rare earthquake action. By adopting the technical measures of steel-reinforced concrete beams and increasing the reinforcement ratio of substructure columns, the key components of the energy dissipation substructure under rare earthquake action could satisfy the predetermined seismic performance objective requirements.