The Research Of Large-span Cable-stayed Bridge Anti-seismic Performance And Two Kinds Of Shock Absorption Action

In the past 30 years, as the rapid development of Chinese economy, the construction of long-span bridges set off an upsurge. Meanwhile, academics and engineers are concerned about the antiseismic capacity and safety during the stage of construction and use. However, Chinese is only suitable for girder bridges and arch bridges with span less than 150 meters. For large span bridge, we should set up a project and make a comprehensive and detailed analysis. This paper based on the context set forth the following works:1.Summarize the development of the large-span bridge antiseismic theory, the response spectrum for antiseismic analysis and time-history method are presented and discussed.2.Set up full-space finite element model simulation for Jingyue Yangtze River Highway Bridge by MIDAS, and then analyze its free vibration and discuss pile-soil interactions, the border of the role and geometric nonlinear dynamic properties of bridge.3.The theory of response spectrum and computation method is presented. The bridge's antiseismic ability is analyzed by CQC vibration combination method.4.Time-history analysis on the importation of ground motion in synthetic methods was studied. Research for Triangle Series synthesis of the Act prepared by the procedure of ground motion based on the situation at the bridge synthesized artificial seismic waves. Based on the model, the time-history analysis under the earthquake and comparative study considering effect of traveling wave and consistent incentive to seismic performance of the cable-stayed bridge are carried though.5.By mount the viscous elastic link device and the damper between the main tower and the main beam,the Seismic respond of the cable-stayed bridge is researched through finite element program MIDAS.Calculate the optimal parameters of two kinds of shock absorption action,and make comparative study of two kinds of shock absorption action at last.