Seismic control of inter-story isolated eccentric structure subjected to near-field ground motions
Tan Ping1; Ying Wei-xi2; Zhang Ying1
1.Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510504;2.Multi-function Design and Research Academy, Zhengzhou University, Zhengzhou 410001
Abstract：This paper proposes a near-field ground model. Motion equation of an inter-story isolated eccentric structure is formulated. Based on three-rigid panel model of the inter-story isolated eccentric structure, influence of eccentric parameters on the inter-story isolated structure is investigated. Near-field effect on the inter-story-isolated eccentric structure is analyzed by adjusting the pulse period and proportion of pulse component. Optimization law of viscous dampers, which are installed on the isolation story, are developed in this paper. Numerical simulation is conducted to verify the control effectiveness of nonlinear viscous dampers. Results show that the optimal viscous damper can reduce the responses of the substructure, isolation level and superstructure of the inter-story isolation system significantly and greatly enhance the safety of inter-story isolated eccentric structure subjected to near-field ground motions.
2011, Vol. 30 
