摘要
本文建立了梁、墩空间耦联体系力学模型，计算分析了大跨度高墩连续梁桥的横向地震反应；探讨了该桥在地震作用下的相位差效应，以及桥梁横向刚度对其地震响应的形响。研究结果表明，地震波的相位差效应对于大跨度高墩桥是不利的；梁的横向刚度对该桥的横向地震反应影响不大。
In this paper,the calculation model of the girder-pier system is proposed.Lateral seismic response of Long-span bridges with high piers is analysed numerically.Influ-ence of the asynchronous lateral ground motion on the bridge response is studied.Further-more,the role of the lateral stiffness in seismic response is discussed.Results of our study in-dicate that the asynchronous lateral ground motion has a negative effect on the earthquake-re-sponse of the long-span bridge with high piers. However,the lateral stiffness of box-girderhas little effect on the lateral seismic response of the bridge.
关键词
高桥墩
连续箱形梁
地震反应
相位差效应
High bridge piers,continuous box-beams, seismic response analysis,asyn-chronous ground motion,lateral rigidity
