Seismic Response Analysis For The Rigid Bridge On The Maximum Cantilever Section And The Finished Bridge State

At present, the study is focus on theearthquake-proof of built bridge, however, there is alimited research over the shock-resistant bridge which are under construction. The study inthe paper based on the following aspects:1. By different boundary conditions two types of largest cantilever end Tstructureconstruction stage models, namely, soil pile interaction and the end of the pierconsolidation, have been simulated with MidasCivil12.0.Moreover, the analysis of naturalvibration characteristics have been made.2. The response spectrum method, confirmed by the time history analysis method, was usedto analyzed and calculated the displacement and internal forces of key point such as pier,girder and striking bottomfor three models under the earthquake load and obtained the seismicbehaviors of the largest cantilever T structure based on the data ofmodel. According toresults using the two methods, it can be seen that the displacement of model â…¡was higherthan13%compared to model â… , due to the interaction between thedisplacement andfoundation displacement of pile, and the largest cantilever T structure of model â…¢.3. The modelâ…¢ and T structure model of double thin-wall piers were tested by time historyanalysis. From the literatures, the larger flexibility and lower fundamental frequency ofdouble thin-wall piers compared to thin-wall piers, could effective for reducing thedisplacement and stress response. The result from above was verified through comparing thedata of double thin-wall and thin-wall piers. Then comparing the T structure of doublethin-wall and thin-wall piers, the results that the double thin-wall piers could better benefit toimprove the seismic performances of bridge in construction stages was obtained.