The Seismic Response Analysis Of A Long Span Continuous Rigid Frame Bridge With V Piers

In recent decades,earthquake disasters frequently occurr all over the world. And once destroyed,bridge,as life-line engineering, will bring great damage to the lives and properties of people.Because the long span continuous rigid frame bridge with V piers is one of the most extensive bridges,the in-deep analyses of seismic reistance performance of the beidge ensure efficiently its safty.Based on the basic theory of the seismic response analysis,this thesis researches problem of the seismic response of a long span continuous rigid frame bridge with V piers,and takes Qiaodao Lake Bridge-a 915m length continuous rigid frame bridge with V piers of one uint with seven spans-in Chun'an County of Zhejiang Province as an example.In this thesis, the main analyses include model analysis,response spectrum analysis and time-history analysis of the bridge by finite element method.The seismic analysis includes water dynamicis,pil-soil interaction,and other factors on seismic response of the bridge. This thesis includes the main work as following. It elaborates theoretical foundations of the water dynamic effects and pile-soil interactions particularly,studies the input way of these effects in Midas / Civil program,and establishes a complete calculation model of the bridge in Midas / Civil program.It analyzes pile-soil interactions influension on dynamic characteristics of the bridge.And according to characters of high piles most submerged in water,this thesis discusses water dynamic effects on dynamic characteristics and seismic responses of the bridge.It describes the seismic responses of the bridge, under consideration of the seismic combination of vertical and horizontal earthquakes. Moreover,after selectes a typical record of the past earthquake,this thesis do the time-history analysis,and combine the results of the time-history analysis with the outcomes of the response spectrum analysis to get some preliminary conclusions.The conclusions,which are from comprehensive analyses of the seismic response of Qiandao Lake Bridge,can be referenced to the seismic reistance design of the long span continuous rigid frame bridge with V piers。...