Design and experimental verification of a new multi-functional bridge seismic isolation bearing  

作　　者：Chen-xi XING Hao WANG Ai-qun LI Ji-rong WU 

机构地区：[1]MOE Key Laboratory of Concrete and Prestressed Concrete Structures,Southeast University,Nanjing 210096,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2012年第12期904-914,共11页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the National Natural Science Foundation of China(Nos.50725828,50908046,and 50978056);the Teaching&Scientific Research Fund for Excellent Young Teachers of Southeast University,the Basic Scientific&Research Fund of Southeast University(No Seucx201106);the Priority Academic Program Development of Jiangsu Higher Education Institutions,China

摘　　要：A new multi-functional bridge seismic isolation bearing(MFBSIB) is designed and its mechanical model is developed in this paper.Combining an upper sliding device and a lower energy dispassion isolation device effectively,the new MFBSIB can adjust the deformation caused by temperature,vehicle breaks,and concrete creep,etc.,in addition to dissipating energy.The switch of 'slide-isolation' is achieved and the efficiency of both upper and lower parts is validated through experiment with a model.The shear performance curve established in this paper is verified to be efficient in describing the mechanical characteristics of the bearing through experiment.It is proved through both numerical calculation and experimental analysis that the new MFBSIB is endowed with enough vertical rigidity,good energy dissipation ability,stable overall performance,and good realization in expected goals.Its performance is slightly influenced by shear stress,while affected by vertical pressure,loading frequency,slide limit,etc.,diversely.The results could provide reference for study and application of the new MFBSIB.A new multi-functional bridge seismic isolation bearing （MFBSIB） is designed and its mechanical model is developed in this paper. Combining an upper sliding device and a lower energy dispassion isolation device effectively, the new MFBSIB can adjust the deformation caused by temperature, vehicle breaks, and concrete creep, etc., in addition to dissipating energy. The switch of ＇slide-isolation＇ is achieved and the efficiency of both upper and lower parts is validated through experiment with a model. The shear performance curve established in this paper is verified to be efficient in describing the mechanical characteristics of the bearing through experiment. It is proved through both numerical calculation and experimental analysis that the new MFBSIB is endowed with enough vertical rigidity, good energy dissipation ability, stable overall performance, and good realiza- tion in expected goals. Its performance is slightly influenced by shear stress, while affected by vertical pressure, loading frequency, slide limit, etc., diversely. The results could provide reference for study and application of the new MFBSIB.

关 键 词：Seismic isolation bearing Sliding device Finite element analysis Model experiment BRIDGE 

分 类 号：U443.36[建筑科学—桥梁与隧道工程]