About the author:

1. Sichuan Institute of Building Research, Chengdu, Sichuan 610081, China; 2. Shanghai Key Laboratory of EngineeringStructure Safety, Shanghai Research Institute of Building Sciences Co., Ltd., Shanghai 200032, China

Abstract:

In view of the problem that the seismic performance of a school teaching building does not meetthe requirements of the code, the isolation technology and the combined seismic mitigation and isolationtechnology are used to design the reinforcement scheme. The unreinforced structure （FIX） model, theisolation reinforced structure （ISO） model and the combined seismic mitigation and isolation reinforcedstructure （ MIX） model are established by finite element analysis software. The seismic responsecharacteristics of the three models are compared and analyzed by elastoplastic time-history analysis method.The research results show that the natural vibration period of the structure can be significantly prolonged byisolation technology. Compared with FIX model, the maximum reduction of acceleration response of ISOmodel and MIX model is 85.3% and 84.5% respectively. Compared with the FIX model, the inter-storydrift angel of the ISO model is significantly reduced, but the inter-story drift angel of the first floor is stillsignificantly greater than that of other floors. Through the addition of viscous dampers at the first floor, theinter-story drift angle of the MIX model is significantly reduced compared with that of the ISO model,withthe maximum reduction rate reaching 58.6%. As the peak ground acceleration increases, the deformationof the seismic isolation bearings and viscous dampers increases,which can further enhance the dissipationof seismic energy, and the dynamic response control effect improves accordingly.