Concrete Filled Steel Tubular Arch Bridge Ultimate Bearing Capacity Of Simulation And Cross Struts Impact Study

The Concrete-filled steel tubular arch bridge is our country new technique of the bridge building development in recent years, having advantage of light deadweight, the big strength and the strong anti- transform ability. It prefer to solve to many contradictions of saving a lot of materials, the light weight of installment, the simplicity of construction and ability of great load. So the Concrete-filled steel tubular arch bridge gets the fast fierce development in recent years. The model experiments and the true bridge of imitation by computers are current main means of ultimate load carrying capacity research of The Concrete-filled steel concrete , but because of being affected by the size and the space effect, reflecting ultimate load carrying capacity of structure with difficulty . But the adoption of the analytical technique that the computer imitates the whole process of ultimate load carrying capacity of concrete-filled steel tubular arch bridge can well reflect and estimate ultimate load carrying capacity. Therefore, the textual research has a important meaning for much theories and the engineering fulfillment.The textual thesis is mainly divided into two big parts, the first part is the theories which mainly study various problem we often meet during the process with the computer imitating the true bridge, among them including the merit and shortcoming of the current various finite element models to compare, discussion of several geometric nonlinearity and material nonlinearity problems, and the simple study to the problem we meet during solution.The second part, with the theories of the first part for guide, pass a software ANSYS to imitate the napu big bridge main arch ring's ultimate load carrying capacity under well-distributed loads, in imitating process, distinguishing the emulation by three ways: 1, the characteristic value emulation, 2,the geometric nonlinearity emulation 3,double nonlinearity emulations, and sum up the frame of the order flow within various emulation process, so that the good leading function can be provided with related calculations. In dual nonlinearity emulations process, by the compound beam unit we can consider a hoop function of the steel pipe to the...