Research On Static And Dynamic Analysis Of Ling Span Continuous Rigid Frame Bridge With High-piers In Mountainous Area

In this paper,the finite element analysis model of the bridge is established by using the finite element analysis software Midas Civil and Midas FEA,and the static and dynamic performance of the high-span long-span continuous rigid frame bridge in the mountainous railway is studied in this paper.the main research content as follows:The finite element analysis model of bridge beam system is established,and the force analysis of the whole bridge is carried out during the construction stage and the use stage.The mechanical performance of the main girder and the pier is summarized under the combination of the construction stage and the stage of use.The natural vibration characteristics of the bridge are analyzed and analyzed.The results of response spectrum analysis,linear time history analysis and nonlinear time history analysis are used to analyze the internal force response and displacement response of the bridge under the earthquake.Spectral analysis and linear time history analysis of the ground motion response results were compared;at the same time analysis of the bridge bridge traveling wave effect on the structural ground motion response.The maximum partial cantilever state and the zero-block local analysis model under the most unfavorable load conditions are established.The detailed analysis of the block 0 is carried out to analyze the effect of block 0 block on the maximum cantilever state during the construction phase and the most unfavorable load combination in the use stage Force state.By changing the high parameters of the long span continuous rigid frame bridge,the sensitivity analysis of the seismic response of the long span continuous rigid frame bridge under different pier height and pier height difference is systematically carried out.