结构工程师Issue(4)：80-86,7.
考虑行波效应下的多塔斜拉桥减隔震体系研究
Analysis of the Seismic Isolation System of a Multi-tower Cable-stayed Bridge Considering the Travelling Wave Effect
摘要
Abstract
A nonlinear three-dimensional finite element model was established for a multi-pylon cable-stayed bridge.Seismic response analyses of the bridge under excitations considering the travelling wave effect were conducted for both the Conventional System (CS)and the Seismic Isolation System (SIS).The results show that:(1 )For the CS,the traveling wave effect can significantly increase the internal force of upper tower bot-tom;but the SIS that uses the CSFAB has a decreasing amplitude ratio;(2)Sesismic responses of the pier decrease at the loading cases considering the traveling wave effect and the SIS can further reduce the pier forces;(3)Bearing displacement of the approach span increases obviously under traveling wave effect;there-fore,the CSFAB is recommned to be adopted;(4)The relative displacement between the main spane and ap-proach span was further enlarged under the traveling wave effect.Therefore,it is suggested that restrain de-vices and bumper devices should be set up at this place in order to improve seismic behaviors.关键词
行波效应/多塔斜拉桥/常规体系/减隔震体系/拉索减震支座/减震率Key words
traveling wave effect/multi-pylon cable-stayed bridge/conventional system/seismic isolation system/the cable-sliding friction aseismic bearing (CSFAB)/decreasing amplitude ratio引用本文复制引用
高康,袁万城,屈小伟,党新志..考虑行波效应下的多塔斜拉桥减隔震体系研究[J].结构工程师,2014,(4):80-86,7.基金项目
国家自然科学基金资助项目（51278376，90915011）；同济大学土木工程学院光华基金项目 （）
