Long Span Continuous Beam Bridge Seismic Response Analysis And Seismic Isolation Technology Research

In recent years, Global earthquakes occur frequently, The bridge project,as a lifeline,Once the damage occurs in the earthquake will cause huge losses to people’s lives andproperty. Long Span Continuous Beam Bridge is the main bridge across the river when theriver is widely used, so its seismic performance analysis is particularly important. On thebasis of the basic theory of seismic response analysis outlined in Inner Mongolia YellowRiver Bridge is an engineering background, a joint-second span continuous beam bridge(55+10×100+55) m seismic response problem. Using the finite element method UNGA long-span continuous beam bridge modal analysis, time history analysis, seismic isolationanalysis. Conducting seismic response analysis, considering the effect of pile-soilinteraction, traveling wave effect and other factors on the structural internal force anddisplacement reactions. The main research contents include: the pile-soil interactionelaborated, traveling wave effect and reduce isolation technology theoretical basis, theirspecific simulation Midas/Civil in a detailed discussion, establish a complete bridge model;analyzed influence on the dynamic characteristics of pile-soil interaction bridges; consider acombination of vertical seismic and horizontal seismic input, bridge seismic responseanalysis; selected seismic safety evaluation report on the bridge seismic time-historyresponse analysis; comprehensive comparison of non-isolated schedule response timehistory response analysis and isolation calculation results of the analysis, draw somepreliminary conclusions. Inner Mongolia, a bridge by a more comprehensive seismic responseanalysis, the results of the General Assembly can provide a reference for long-spancontinuous beam bridge seismic design.