Analyses Of Static And Dynamic Performance And Joint Local Stress Of Large-Span Continous Steel Struss Girder Bridge In Passenger Delicated Double-Line

In this thesis, taking long-span continuous steel truss girder bridge as background, the static and dynamic effects of the bridge were studied. Furthermore, cantilever construction closure scheme and local analysis of joint structure were researched as well.Firstly, a FEM software MIDAS/Civil was used to establish a spatial finite element beam model of the bridge. Deformation and stress under single action and combined actions of dead load, live load, lateral wind load and temperature change etc. of the bridge structure are analyzed and calculated.Secondly, cantilevered construction scheme for the bridge was studied with consideration of structural deformation and stress for crucial cases, and unstressed closure method for the bridge.Thirdly, through simulating the interaction between pile and soil, free vibration characteristics were analyzed during its finished stage. Response spectrum method and time history method were respectively applied to calculate deformation and stress of main components when the bridge was under the action of seism as well as the combined actions of dead load and seism.Finally, using the FEM software ANSYS. shell element was applied to simulate joint structural details and local analysis has been done. The stress of joint under unfavorable loads have been studied.