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《Journal of Earthquake Engineering and Engineering Vibration》 2013-01
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Comparison among seismic isolation schemes for continuous girder bridges

YAN Xu1,HE Jinhai2,YUAN Wancheng2,DANG Xinzhi2(1.Anhui Transport Consulting &Design Institute Co.,Ltd,Hefei 230088,China; 2.State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)  
The use of isolation bearing in supporting system is the main seismic isolation measures used in multi-span continuous girder bridges.It will lead to different seismic performance and economical efficiency for bridges when the bearing arrangement is different.This paper makes an introduction to the lead rubber bearing,and an analytical study on the performance and economical efficiency of seismically isolated bridge structures under the condition that all or part of bearings are lead rubber bearings subjected to earthquake excitation,with pulse and non-pulse,is conducted.The change of pier height is taken into consideration.The study shows that the scheme,in which part of bearing is lead rubber bearing,performs as well as all bearing is lead rubber bearing,and furthermore it has high economical efficiency;The location of seismic bearing,height of pier and pulse characteristic are decisive for seismic and economic performance.When the bearing is located on the side pier of bridge with low and about the same height of piers will have high performance.
【Fund】: 国家自然科学基金项目(50978194 90915011)
【CateGory Index】: U442.55
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