Analysis On The Aseismatic Behavior Of Continuous Rigid-framed Bridge

In recent years, earthquake disasters frequently occurre all over the world which is dubbed that the earth is entering "vibration mode". Contious rigid-frame bridge as a widely used type of bridge, it is very important to study the influence of earthquakes. In this thesis ,based of a five-span contious rigid-frame bridge as enginreering backgroud,using time-history method analyse the earthquake influence of it. Major works are as follows:First, this thesis introduces quickreport of earthquake magnitude and intensity, overviews the seismic design theory.Second, introduces the theory of finite element equation and the metheds of solving structural eigenvalue. Using the Finite Element Analyze Software ANSYS through beam element build up the bridge model, and analyse the Bridge's dynamic properties.Third, compare direct acceleration method to large mass method, validate the large mass method's correctness and usablity and complet the upholstery for the earthquake analysis.Forth, study the continuous rigid frame bridge time-history response.Through only horizontal input and horizontal vertieal input, analyse the influence vertieal input internal force and displacement for the structure.Fifth, under the same fortification conditions, compare EL-Centro wave to Taft wave the influence of internal force and displacement.Last, based large mass method to study the bridge under different visual wave veloeity. Anasyis the influence of traveling wave on it based on the compasison with the uniform ineeniive method.