Study of the seismic performance of expansion double spherical seismic isolation bearings for continuous girder bridges

作     者：Peng, Tianbo Yu, Xuntao Wang, Zhennan Han, Lei 

作者机构：State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Shanghai 200092 China Department of Bridge Engineering Tongji University Shanghai 200092 China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2012年第11卷第2期

页      面：163-172页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：National Natural Science Foundation of China Under Grant No. 50708074 National Key Technology R&D Program Under Grant No. 2009BAG15B01 the Ministry of Science and Technology of China, Under Grant No. SLDRCE 08-B-04 the Fundamental Research Funds for the Central Universities Kwang-Hua Fund for College of Civil Engineering, Tongji University 

主　　题：double spherical seismic isolation (DSSI) bearing seismic isolation seismic performance continuous girder bridge 

摘      要：The development of an expansion double spherical seismic isolation (DSSI) bearing by modifying the fixed DSSI bearing is described in this paper. The expansion DSSI bearing is characterized by its good energy dissipation and horizontal displacement capacity and has been successfully integrated into the seismic design of several important engineering projects in China. It is envisioned to be used as a substitute for ordinary expansion bearings in continuous girder bridges to distribute the longitudinal earthquake action among all the piers. Its development, configuration and working mechanism are introduced first. The test method and the seismic performance of an expansion DSSI bearing are then briefly described. A theoretical analysis followed by a numerical analysis for an actual four-span continuous girder bridge are provided as an example, and it is concluded that the expansion DSSI bearing can be integrated into the seismic design of continuous girder bridges.