Spatial Analysis And Assessment Of Exiting Double-arched Bridge's Loading Capacity

As the continuously development of our country national economy, structural loading capability of current bridges becomes one of the problems that both the engineering and the academic pay much attention to. After it was firstly built in 1964, the double-curved arch bridge has been extensively built all over the country. During their constructing and application, the loading problem is also paid attention to.In this article, the method how to establish the dimensional model of existing double-curved arch bridge by making use of large software ANSYS is studied, a way to assess loading ability combining the dead load experiment is brought out.Firstly, the basic theories of arch bridges are introduced in brief after its origins. Then the rationality of simulating arch-axes by simulative curve is analyzed, and the method how to get real arch-axes in ANSYS according to measured data is obtained.Secondly.history of finite element method(FEM) and its application in bridge construction is summarized.The software ANSYS is introduced. The way establishing space double-curved arch bridges' model with the ANSYS is studied. And the work principle of SOLID95 in the ANSYS is deduced.Thirdly,based on the above work, an actual engineering-YangTou bridgeis analyzied. After the FE model is established, internal force resulted from gravity is caculated, and primary conclusion is gotten which can be a reference for the later work.Finally, combining with loading experiment the caculation is carried on by FE model which has been built in the ANSYS . the values gotten from ANSYS are compared with results by plane theories and the real measured value. In result, the YangTou bridge's loading ability is assessed. According to the above work, valuable conclusions are obtained in the paper.