【摘要】 随着国家经济的发展,大跨度桥梁在我国得到了很快的发展,其中大跨度连续梁桥是应用最广泛的桥型之一。同时,我国也是一个多地震的国家,因此,对作为生命线工程的桥梁建筑特别是大跨度桥梁建筑在地震作用下的反应做深入细致的分析是非常必要的。本文利用MADIS/Civil大型有限元软件为平台,建立大跨度连续梁桥的模型,通过引入弹性单元,对支座进行了模拟,采用质量-弹簧-阻尼-模型对桩土相互作用进行模拟,并对桥梁进行了抗震性能分析,为连续梁桥的抗震设计提供一定的参考。更多还原

【Abstract】 Along with economic development,the long-span bridge has been rapidly developed in our country.Among them,the long-span continuous beam bridge is one of the most extensively used types of bridges.Meanwhile,China is a nation with high-frequency of earthquakes and a wide distribution of seismic zones and bridges are regarded as lifeline engineering in earthquakes.Thus it is necessary to make a detailed and in-depth study of the seismic response of bridges,especially of long-span bridges.In this paper,MADIS/Civil finite element software is used as a platform to establish the 3-dimensional finite element model of a long-span continuous beam bridge.Bearings are simulated by inducting elastic elements.The influence of the pile-soil interaction is simulated by quality-springdamping model.And seismic performance of the bridge is analyzed.Accordingly the paper provides the reference for seismic design of continuous beam bridges.更多还原