Analysis Of Seismic Response Of Span Continuous Rigid Frame Bridge

Today, Along with the increase of urban population and with the rapiddevelopment of economy, Transit is playing the more and more major role in our dailylife. Bridge is the hinge of lifeline,Once it was damaged in the earthquake,it willcause great loss of the people’s life and property. In recent years, seismic damage ofbridge and secondary disasters encourage us use new thinking on bridge seismicdesign. The seismic response analysis of bridge structure become the focus ofpeople’s attention. Rigid frame bridge is widely used, because it’s beautiful shape,save material,and it have the characteristics of the bridge and arch bridge. In thispaper, a typical rigid frame bridge as an example, Combined with Guidelines forSeismic Design of Highway Bridge (JTG/T B02-01——2008), From the seismicinput, structure characteristic and the structure analysis of reaction, I do theearthquake response analysis, Specific content as follows:①First I fully expounds the development of the bridge seismic design method,Mainly introduces the three seismic analysis numerical method such as responsespectrum method, dynamic process analysis and random vibration method②Set up whole bridge calculation model by use the SOLID65and LINK8unitprovide by ANSYS which is the large limited analysis software, and analysis thevibration characteristics of the bridge;③Do the response spectrum analysis under six working conditions whichprovided by the seismic detailed rules，choose the seismic waves do the time historyanalysis which measured at Beijing hotel point in TangShan earthquake，and dorandom vibration analysis (power spectrum method) to the whole bridge;④Do a comprehensive comparison of the calculated results between responsespectrum method and dynamic process analysis and between random vibrationmethod and response spectrum method,Come to the conclusion that the three resultsare similar.