Finite Element Calculation Of The Continuous Rigid Frame Bridge In Construction And Buckling Analysis

The paper takes a bridge as an object of the study and focuses on the research of two points including structure analysis and high-pier buckling analysis of prestressed concrete continuous rigid frame bridge in construction with the cast-in-place cantilever method. The research mainly includes such contents as below:1 .Introducing the prestressed concrete continuous rigid frame bridge of construction control,method and characteristic. Thoroughfully investigating into present analysis methods of bridge structures in this paper.2. According to the theory of mechanical method principle and finite element method, the mechanical model and discretization of the bridge structure have been analyzed numerical simulation of the in details. Through the numerical simulation of the construction process of the bridge with Ansys program and compared its results, a series of method to simulate the construction with Ansys program , which including the establishment of the FEM model, employing the element birth and death capability of Ansys, solution of the FEM model, solution result analysis and so on were finally established. The theory and the method the paper based on about structure analysis indicates well the actual mechanics state of the bridge structure in the construction process and it would be available for reference for the construction of indentical kind of bridges.3 .It elaborates the basic design principles of the beam bridges with high-piers and long-spans, the Ansys finite element software (buekling analysis) is adopted in this thesis to solve structure stable eigenvalue to analyze the buckling capability of continuous curved rigid frame bridge with long-span and high-pier in construction,it including four stage: after high-pier complete,the larger cantilever,sidespan fold shut and full bridge fold shut.