Study the influence of different seismic response control methods on the seismic performance of inter-story isolated multi-tower structure with a large chassis,identify the advantages of different methods in improving the seismic performance,and then provide reference for the seismic response control of such structures.Three control schemes were designed based on a real engineering practice of such building,including adding viscous fluid dampers in the isolation system,adding viscous fluid dampers in the large chassis,and increasing the stiffness of the large chassis.The elastic-plastic finite element models of three control schemes and the prototype structure were established by using the Perform-3D.The seismic responses of these four structures were analyzed and compared,and the control effects of three control schemes on the seismic responses were identified.The following conclusions are drawn that introducing viscous dampers to isolation system is an optimal scheme for controlling the displacement of isolation system and floor acceleration of large chassis,but it significantly increased the seismic responses of tower.The control effects of increasing the stiffness of large chassis on the inter-story drift ratio of large chassis,as well as on the inter-story drift ratio and floor acceleration of tower are the best.All three schemes have negligible control effects on the inter-story drift ratio of tower.
关键词
多塔大底盘层间隔震结构/黏滞阻尼器/刚度/地震响应
Key words
inter-story isolated multi-tower structure with a large chassis/viscous damper/stiffness/seismic response
维普
万方数据