Analysis On Seismic Design Of Prestressed Cconcrete Continuous Rigid Frame Bridge With V-Shaped Pier

With rapid development of economy and population, the requirement of the seismic design in China has been more and more rigorous. In order to make a better research on the effect of earthquake on the nonlinearity of the structure, the nonlinear analysis on the bridge has been developing. The certain failure of the bridge is allowed in the elemental principles of normal seismic design on bridge without the possibility of collapse. The nonlinear elastic-plastic seismic analysis on the bridge is required to control and calculate the failure.As the country with frequent earthquake, the disaster brings numerous and burdensome loss to the people. However, bridge is the key hinge in the transportation net and a part of the important components in the lifeline system. Once the collapse of the bridge, it is difficult to revise so as to suspend the rescue operation. It is necessary and essential to make the bridge good and unblocked. As a result, the seismic design on the bridge has been catching more attentions from the people.Based on the summary and analysis on the overseas and domestic theories and methods, with the friendship bridge in Chifeng city as the calculation example, the paper makes the main research on the seismic performance of the prestressed concrete continuous rigid frame bridge with V-shaped pier on the basis of multi-level fortification standard of the bridge and road seismic design principle.At first, the research on dynamic property of the prestressed concrete continuous rigid frame bridge with V-shaped pier is made in the paper. The software Midas civil2010is adopted to create the model and make the analysis to calculate the result of the proper value. Then the seismic performance of the bridge under the action of earthquake E1and E2is analyzed through multi-mode response spectrum method. And the results are compared with the design requirements in the bridge and road seismic design principle to evaluate whether to meet the requirements. Finally, as the most authoritative method to evaluate the seismic performance, the nonlinear dynamic time-history method is conducted on the bridge. The earthquake in Kobe, Japan is used to make the time-history analysis to calculate the base shear time-history curve, the top displacement time-history curve and bending moment-curvature curve and explicit the seismic property of the bridge.