Finite Element Simulation Analysis Of CFST Arch Bridge

For it so many merits CFT(Conerete filled steel tube) is being applied extensively in the engineering practice, especially in long-span bridges and high-rise buildings . Researches and investigations on the bearing capacities of CFT and its time-dependent behavior is being widely carried out.As the application of CFST(Conerete Filled Steel Tube) structures to bridges is being solved the problem of the application of high- strength material of arch bridge and the problem of the construction of arch bridge, two main bridge puzzles, arch bridge becomes much lighter and has stronger expressive force and the development of arch bridge is infused with fresh vitality. But now, the design and construction of CFST arch bridge can only be based on the CFST specifications in the construction in dustry with the combination of relevant clauses in the bridge design codes which bring about certain difficulties to the practical application of this sort of bridge for the lack of special design codes and construction codes.In this dissertation, the Weihe bridge, a through CFST arch bridge is discretized by the FEM according to its structural characteristics with the spatial beam element simulating the horizontal tied beams, end floor beams, middle floor beams, arch ribs and the like and with the spatial link element simulating the suspenders to erect the bridge's spatial mechanical computational finite element model.Finite element common software MIDAS/CIVIL is applied forits spatial mechanical calculation and mechanical properties in various cases are obtained.The Proposed analytical method and those research findings can be consulted in the engineering praetic, the buckling bearing capacities, and the time-dependent behavior design of CFT columns and CFT arched bridges.