Dynamic Effect Analysis Of Vehicle-induced With Frame- Type "Integration Construction-bridge" Structure

In the past few years,urban rail transit has made outstanding contributions to the solution of people's travel convenience and urban development,so the development of urban rail transportation has become the consensus of the world.Among many modes of urban rail transportation,space frame station has become the mainstream station type of domestic elevated rail transportation operation mode with good overall planning,simple construction,good overall stability and seismic performance.However,the dynamic response of different components and the lack of sufficient theoretical basis for dynamic coefficients remain to be solved.Taking Dazhushan Station in Qingdao City as an example,Author analyzed the vibration regulation of vehicle-bridge coupling in the frame-type of integrated bridge-building station.what's more,To explore the dynamic effects of train parameters and station structural parameters about the station.The main contents are as follows:(1)author established vehicle-bridge coupling dynamic analysis model.Then,Selecting the appropriate vehicle-bridge coupling method,train model and vehicle formation,the station model is established by finite element ANSYS software,and the modal analysis of the established station model is carried out at last.(2)In order to get the regular response curve.Author discuss the dynamic response of each factor to the station from two aspects of train parameters and station structure,including train speed,number of train passengers and braking force,track beam stiffness(including section area and elastic modulus),stiffness and span of frame column.Based on natural frequency,response frequency and dynamic response,the simplified model of station is obtained.(3)The influence of train and station parameters on the dynamic coefficients of the station structure is studied.The analysis shows that track beam stiffness,train load,span and frame column parameters are the main factors affecting the dynamic coefficients of the station.The relationship between dynamic coefficient and station frequency is obtained by linear regression,and the suggested value of dynamic coefficient is fitted.