Analysis Of Seismic Response And Seismic Of Shanghai Yangtze River Bridge

Long span cable-stayed bridge is characterized by its beautiful appearrance,clear path of transfering force,better mechanics properties, Large capacity of acrossing, Strong performance of seismic and so on which is widely used in bridge engineering.But,how to establishing practical seismic analysis and design methods for them which is always concerned for the academic and engineering.In this thesis, mainly consider the three aspects in seismic analysis:the bridge's characters, the ways of seismic inputting,bridge's seismic response. On the basis of Shanghai Yangtze River bridge ,rearching some aspects as follow:(1) The study of analysis approach of seismic response. Several analysis methods used to calculate the seismic response of bridge,such as the the response spectrum approach,time-history approach, random vibration approach, are introduced and discussed.At last making sure the fit method for the thesis:time-history approach.(2) The finite element model of the structure was formed through reasonable simplification. And structural dynamic properties were calculated by using the famous program of ANSYS. Structural dynamic properties were performed;(3) Analysis the structure for linear and nonlinear which using the Newmark-βmethod of the time-history approach.Through the contrast,found that the linear analysis is not fit . Therefore, the nolinear analysis become focal point. Ultimately, some beneficial conclusions were gained.