Structure Behavioral Analysis Of Concrete-Filled Steel Tubular Stiffening Frames Reinforced Half-Through Arch Bridge

In recent years, as a new-type bridge, concrete-filled steel tubular(CFST) arch bridge has been deeply developed in our country' s construction, for its own merits and can luckily make agreement with the factual situation of bridge engineering.However, the study on design theories of CFST arch bridge gets relatively behind the engineering practice, and the search on dynamic performance of this structure get relatively behind the production on static feature of this structure. Presently, CFST arch bridges develop in the direction of large-span and lightweight style, accordingly, investigators and devisers should increasingly attach more importance to their dynamic behavior, and some typical dynamic matter of bridges, such as seismic response, wind induced vibration, coupled dynamic vibration between bridge and vehicle should not be ignored.In this thesis, taking the example of some highway Concrete-Filled Steel Tubular Stiffening Frames Reinforced half-through arch bridge(Zhouhe bridge), with the help of ANSYS, one universal FEM software, author analyze its dynamic and static behaviors and abstract it as follows:1.Analyze the development and application of finite element numerical analysis method of statics and dynamics of arch bridge.2.Establish space finite element model of this bridge, and give the detailed explanation of the entire bridge local structure and the process of establishing model.3.Carry out the entire bridge static analysis, specifically analyze two kind of operating modes concluding its deadweight and temperature variable, and make the certain analysis on the short suspension bar in the elevation of temperature operating mode.4.Carry out the entire bridge natural vibration feature analysis, and consider whether expansion joint has the impact on natural vibration feature of the entire bridge.5.During the dynamic analysis of Zhouhe Concrete-Filled Steel Tubular Stiffening Frames Reinforced half-through arch bridge, the time history responses of the structure under uniform velocity moving load and impact load are analyzed, and the amplification coefficients of deflections and internal forces of the structure are intensively analyzed.