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中文摘要：
以一座主跨908 m 的多塔斜拉桥为研究背景，建立全桥动力计算模型，分析了行波效应下该结构常规体系与减隔震体系的地震响应，结果表明：①对于常规体系，行波效应会增大上桥塔内力，但采用拉索减震支座的减隔震体系具有较好的减震率；②考虑行波效应对桥墩抗震有利，而减隔震体系会进一步降低桥墩内力；③减隔震体系可以将主桥支座位移控制在要求范围内，对于引桥，考虑行波效应时，支座位移增大明显，也建议采用拉索减震支座；④行波效应下，主-引桥相对位移增大，建议在主-引桥间设置连梁装置和缓冲装置，以提高抗震性能。
英文摘要：
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.
同期刊论文项目
同项目期刊论文
Experimental Studies on Seismic Performance of Subsidiary Piers of Long-Span Cable-Stayed Bridge wit
Study on Dynamic Characteristics of Long Span Continuous Bridge from Construction to Completion Cons
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