| Bridge has become the main traffic artery of the city, and it plays an important role in the national economy and the daily life of the residents.Especially in the earthquake damage to the bridge caused by the indirect economic loss is also very huge, which brings great difficulties to the relief workers, and fully shows the importance of bridge engineering seismic research.China is a multi earthquake country, thus improving the seismic performance of bridges for earthquake disaster prevention is particularly important.Prestressed concrete continuous girder bridge is one of the most widely used bridge.In this paper, the seismic response spectrum analysis and dynamic time history analysis of three span continuous girder bridges are carried out. The main research contents are as follows:(1) the paper discusses the influence of earthquake disaster on the continuous beam bridge and the development and research status and theory of seismic resistance of bridges.(2) Build Wen Guan Tun bridge spatial dynamic calculation model and the self vibration characteristics analysis, considering the pile-soil interaction and no influence on the bridge.(3)Select the design response spectrum, the spectrum analysis of bridge earthquake response, comparison of pile- soil interaction and the influence of the bridge, and seismic checking.(4) According to the frequent earthquake fortification intensity, earthquake peak acceleration and bridge site seismic history record earthquake dynamic time history analysis of the continuous beam bridge, comparing considering pile-soil interaction and not influence on the bridge and the bridge were seismic checking.(5) under seldomly occurred earthquake fortification intensity, earthquake peak acceleration and bridge site earthquake history records on the bridge for the nonlinear dynamic history analysis, find the rare earthquake, the weak link of the bridge structure, make evaluation of seismic performance. |
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