中文摘要：

结合工程实例，利用有限元分析软件Midas／civil分别建立了考虑和不考虑桩土作用的两种连续梁桥有限元模型，并对比分析了地震荷载作用下两种模型的动力响应，得出考虑桩土结构相互作用可能会改变结构的振型及次序．并对桥梁抗震有利等结论，对于实际工程中基于性能的抗震设计有一定的借鉴意义。

英文摘要：

In this paper,two kinds of finite element models of continuous beam bridge that consid- ering and not considering the effect of pile soil interaction are established by using the finite element anal- ysis software Midas/civil, and the responses of the two models are compared and analyzed,and it＇ s drawn that considering the interaction of pile soil structure may change the vibration mode and order of the struc- ture, and is favorable to the earthquake resistance of the bridge. It has certain reference significance for the performance based seismic design in the practical engineering.