Simulation Analysis Of High Speed Railway Large Span Continuous Beam Bridge

With the rapid development of China's transportation industry, bridge construction has entered a period of unprecedented height in recent years. Because of continuous prestressed concrete beam bridge with smooth and comfortable ride, across the ability to strong, small deformation, structural stiffness and the advantages of easy maintenance, have become long-span high-speed railway bridge construction one of the main bridge, while the cantilever construction method as its own advantages to the forefront of modern continuous bridge of the main construction method, the bridge construction in recent years more and more adoption. However, continuous bridge from the cantilever bridge construction to operation, the main beam elevation is constantly changing, to ensure that the main bridge closure and meet the design requirements of linear and stress, be on the construction process of the main beam deflection and stress prediction and control. This requires that all construction phase based on the actual situation on the bridge construction simulation analysis to calculate the cantilever structure during the construction force and deformation of the ideal state, and the results of simulation analysis applied to the later elevation control study.In this paper, Luo Zhuang bridge (prestressed concrete continuous beam bridge) for the engineering background, using CSRB and analysis software MIDAS two of the bridge were simulated. The following key elements:First, prestressed concrete continuous beam bridge and cantilever prestressed concrete continuous beam bridge construction are outlined, but also on the development of bridge construction at home and abroad, and prestressed concrete continuous beam control of the role and significance are described.Second, a brief description of the construction monitoring construction control the content and impact factors, as well as its work processes and monitoring systems, and high-speed rail continuous beam control features.Third, from the perspective of personal understanding, self-organized control of the language describes the construction method, finite element theory, the mechanism of shrinkage and creep of concrete, the construction height control and nonlinear analysis methods and finite element analysis software Romania and the village bridge was analyzed.Fourth, Luo Zhuang Bridge real bridge for the calculation example, the main description of the construction process, construction technology based on the finite element structural unit, structural analysis, a brief introduction CSRB (construction of bridge dynamic simulation of process monitoring of special software) and use the construction process of its various stages of the simulation calculated the various construction phases of the stress, strain, internal forces and deflection curves. South Korea also used a large general-purpose finite element software process monitoring of special software) and use the construction process of its various stages of the simulation calculated the various construction phases of the stress, strain, internal forces and deflection curves. South Korea also used a large general-purpose finite element software MIDAS-CIVIL, finite element model to build bridges of bridge simulation analysis, and focuses on the shrinkage and creep of the bridge structure.Fifth, the two CSRB with MIDAS software graphic simulation results for comparison, was consistent, realistic simulation results meet the design requirements.