The Research On The Stress Analysis And Reinforcement Design Of Oblique Underpass Bridge

Along with the development of rapid economic, level crossings in the city cause the traffic accidents. Level crossings change for grade crossing has become to an important problem. And the underpass bridge have been recognized by the society that the unique advantages and suitability.Based on the single span and multi-span across the frame bridge as the research object, take the finite element software ANSYS simulation by load in the internal force change, and make a conclusion.Built on thick plate finite element theory, use the Shell43unit. The paper summarizes the in length, big angle skew and elastic foundation coefficient under different conditions such as the change of internal force. It summarizes the structure force law. And in the process of analysis to the structure stress, it is full of consideration the effect of load.According to the theory of reinforcement (Armer) theory and Johansen theory is to infer skew frame bridge reinforcement of the theory. And it puts forward the orthogonal and oblique reinforcement formula. In order to achieve the optimal engineering force and reasonable reinforcement, it is to save the cost of the goal. Finally, the application of engineering examples, it is as the research object in Jinli railway bridge in mileage for railway frame K80+778place three span frame bridge. It is as the foundation by the engineering geology and engineering scheme. It is simple introduced the bridge to CAD software system. And use the software to take the structure reinforcement. Base on the bridge CAD system software framework of bridge reinforcement results, it put forward the reasonable reinforcement measures.