Seismic Response Analysis Of (60+100+60)m Continuous Beam Bridge

With the development of transportation in our country,the number and length of continuous beam bridge has been increasing rapidly.But the destruction of bridges under earthquake will not only cause huge economic losses,but also bring great difficulties to the rescue work,so the seismic response and seismic performance analysis of the continuous beam bridge is particularly important.This paper takes the(60+100+60)m continuous beam bridge of Lianyungang to Zhenjiang passenger dedicated line as the research object,the finite element models were established by Midas Civil to analyze the seismic response and evaluate the seismic performance of bridge under the frequent earthquake and rare earthquake,the main work is as follows:(1)The development course of the bridge seismic analysis theory is summarized.(2)Two types finite element models of considering pile-soil interaction and fixing at pier bottom are established to analyze the effect of pile-soil interaction on dynamic characteristics.(3)The analysis of seismic response under the longitudinal and transverse frequent earthquake is conducted under the presence or absence of train load,and the influence of pile-soil interaction on internal force and displacement is analyzed.(4)The analysis of seismic response under frequent earthquake is conducted by the picking three groups of seismic wave records and using of time history method,and the results are compared with the results of response spectrum analysis.(5)The seismic response of continuous beam bridge under rare earthquakes is studied,and the seismic performance of piers under rare earthquakes is analyzed.