The Seismic Reduction And Isolation Analysis Of Long-span Railway Continuous Beam Bridge

With the development of railway technology in recent years, Long-span continuous beam structure has been widely associated applications, The main bridge span and associated long continue to record. For long-span continuous seismic performance of the railway beams and reduce isolation-depth research and analysis programs, such as improving the bridge provides a scientific basis has very important significance seismic and safety design.Based on the basic theory of seismic response analysis, this thesis in the background of The WuXi Railway Yellow River Bridge, analyzed and discussed the following aspects:1) Using finite element analysis program MIDAS/CIVIL 2012 to establish a full-bridge spatial finite element model and modal analysis of their conduct. By analyzing the seismic response of structures under different boundary conditions, summarizes pile-soil interaction on seismic response of structures.2) By conducting the response spectrum analysis and elastic time history analysis on the bridge seismic response, making a comparison between the calculation results of the two methods.3) Proposed bridge seismic isolation scheme, and parametric analysis of different options, choose the appropriate seismic isolation scheme.4) Analysis the impact of traveling wave effect on long-span continuous beam seismic response.The analysis results show that:Seismic isolation technology can significantly reduce the seismic response of long-span railway continuous beam internal forces, and achieved good economic benefits, different anti damping effect of isolation facilities, and should be selected according to actual situation of the bridge in practical application.