Study On The Simulation Analysis Of The Construction Control Of Shen Xingou Bridge

In recent years,CFST Arch Bridge has developed very quickly for its special structure properties and beautiful appearance.As the development of construction technology on CFST Arch Bridge,people gradually realize the importance of the construction control technology.The construction of CFST Arch Bridge is a very coplex process,In order to ensure the final alignment and force state of the bridge to meet the design requirements,it is very necessary to make a real-tmie monitorization and control in the construction process.Taking the Shen xigou bridge which is under constructed in Hanyuan city of Sichuan province as an example,some technical problems about CFST arch bridge's construction and constrcution are studied,among which are the construcion technology of CFST arch bridge,the simulation analysis and calculation on the construcion process,and the monitorization and control of sectional stress,structural defor location and cable stress.The main contents are summarized as follow:(1)Briefly describing the origin and development of CFST arch bridge,outlines the development of bridge construcion control theory,and takes examples to express the harms of no construction control in construction process,and briefly introduces the theory and methods of constrution control on CFST arch bridge;(2)In this article,a brief summarization of the main construction methods of CFST arch bridge,and it is analyzed briefly that which kind of construction methods will be used in different types,and two main methods of the cable crane-assembly method and the rotation method are emphasized.Introduces the lefting and pumping method of CFST arch bridge and tests the quality of concrete,and introduces the whole construction process of Shen Xigou Bridge in detail;(3)Introducing the simulation analysis methods in bridge's construction process and the FEM of frame analysising.Analysising the two factors of cable unit impacting simulation results and makes a right treatment to the cable unit in the article,and summing up the zero defor location method and the zero moment method of cable stress calculation.Setting up model by used the FEM software to simulate the constrution process,then analysis and calculation on it,and receiving some corresponding results; (4)Introducing three main monitorizations of defor lation,sectional stress and cable stress in the Shen Xigou construction process,and introducing the theories of monitorization,the layout of measuring points and the monitor methods of every monitorization in detail,the comparing the alignment and force results which measured in the real constrution with the results of simulatoin analysis and calculation,According to the results of this comparison to find out the reasons for the errors in construction.This article takes the construction of arch rib and Concrete reperfusion as the main line,contorls the arch rib's defor location and stress,and the defor location is emphasized,and controls the coordinates changes of every arch rib sections,and takes care the stress changes of arch rib at the same time,and makes sure the CFST can be closed and Construction completed safely and smoothly at last.