Study on Isolated High-Speed Railway Girder Bridge
WU Guobin
TAN Ping
WANG Bing
MA Ancai
Abstract：In order to improve the seismic safety of high-speed railway, the paper studies the typical practical high-speed railway girder bridge, introduces the seismic isolation technology. This paper presents a new isolation system, namely, rubber bearing with 4 lead cores, for the high-speed railway girder bridge. And different types of bearings are considered and simulated for comparison of seismic responses of high-speed railway girder bridge, including friction pendulum bearings and pot rubber bearings. The refined finite element model of a high-speed railway girder bridge with five spans is developed within the environment of ABAQUS. The bilinear model in analysis is used for friction pendulum bearings and lead rubber bearings, and the elastic model of large horizontal stiffness is used for pot rubber bearings. Fiber model is used for concrete and steels. Responses of isolated high-speed girder bridge to a set of earthquake records are compared with those of the corresponding bridge with ordinary pot rubber bearings. The shear deformations of the presented LRBs are compared with those of the friction pendulum bearings. Research results show that the peak displacement of the pier-top, shear deformation, bending moment and curvature of the bottom of the bridge piers are reduced significantly in comparison with the bridge with ordinary pot rubber bearing. The presented isolation system can ensure the safety of high-speed railway girder bridge.
Keywords：High-speed railwayHigh-speed railway girder bridgeIsolationBridge isolationLead rubber bearings
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 32-40 )