High-speed Railway Steel Truss Girder Cable-stayed Bridge Construction Process Simulation Analysis And The Feasibility Of The Simultaneous Construction Of The Tower And Beam

In recent years, with the use of high strength materials, improvements of structural analysis methods and the progress in construction, long span railway bridge has been in the rapid development and wide application, its construction and control of the process is extremely complex,and it receives academic widespread concern in industry and engineering, but it brings many new issues to control of cable-stayed bridge construction, the simulation calculations of the control of cable-stayed bridge construction process is the bridge's main means to determine static state of cable-stayed bridge; it's also one of the main construction control for cable-stayed bridge. The main work is as follows:1,Through extensive reading of available information and organize, it discusses the development,trends and performance characteristics of long span cable-stayed railway bridge, and it describes the main content of construction control and simulation analysis method;2,Based on double Yujiang Railway Bridge, it describes two different construction programs, and the characteristics and differences between the two is discussed;3,Determining the reasonable status of cable-stayed bridge is key to simulation analysis construction control; In this paper,the method of minimum bending energy method and forward analysis is applied to determine the state of bridge, then the construction phase is under analysis and calculation;it gets the main beam of the internal force, displacement, stress, shift the main tower and the cables of the internal force and stress under various stages;4,It selects a representative to study the construction phase. The results of simulation is analysized in detail, some of the changes in the construction process of cable-stayed bridge are summarized,and it supplies implementation of a theoretical basis in the construction control; At the end, the construction of the tower beam synchronization program and cantilever construction program are compared in detail, and the feasibility of changing the program is demonstrated.