Earthquake Response And Aseismatic Design Of The Wuhan Tian Xing Zhou Bridge

Bridge is the hinge of transportation, which has important influence for the country economy. In recent years, earthquake disaster frequently occurred in whole world which brought great damage to the safety of life and property for people. If the bridges which looked as very important structures by people for connecting with people' s life collapsed caused by earthquake, the indirect disaster will take up to bring more loss of life and property. Our country is a land which earthquake is active, the job of prevent the disaster is more important.The aseismatic technique developed fastly in the area of project application. Now it is a very active research area. Theory and practice have proved that: aseismatic control can reduce structural response, which can improve structural aseismatic ability. Therefore it is necessary to study and master the seismic response of bridge for establishing reasonable seismic design system and adopting effective seismic measure.In this thesis, on the basis of the study achievements at home and abroad, on the basis of WUHAN TIANXINGZHOU Bridge, long span cable-stayed bridge earthquake responses are studied as follows:1. The finite element model of the structure is formed through reasonable simplification. And structural dynamic properties are calculated by using the famous program of ANSYS. Structural dynamic properties considering support rigidity, arch rib rigidity as well as soil-structure interaction is performed. The factors of geometry nonlinear are considered in the analysis. The reasonable initial shape of cable-stayed bridge is studied.2. The reaction of Long-span cable-stayed bridge under the uniform excitation of earthquake is analysed. Structural seismic responses are researched in the condition of the wave from vertical and longitudinal direction. The bridge's responses under travalling-wave effect of earthquake are studied.3. According to the fact of the TIANXINGZHOU Bridge of WUHAN, twoaseismatic projects are studied: setting longitudinal damper under the tower of bridge and setting longitudinal damper under the tower and the assistant frusta. Different conditions are considered for aseismatic research of the bridge in this two aseismatic projects, advancing more appropriate aseismatic project.4. The parameters of viscous damper are studied. The effect of damping coefficient and velocity exponent, the maximum force of the device, aseismatic effect of viscous damper are studied, which affords academic foundation for aseismatic design of the Long-span cable-stayed bridge.