The Application Research On The Cable Suspended System In The Construction Process Of Steel-box Tie-bar Arch-bridge Of Large-span

Steel-box tie-bar arch-bridge has a rapid development in China. Whether it is application in the urban bridges and highways and high-speed railway bridges is increasingly favored by the designers.However, compared with the design of steel-box tie-bar arch-bridge, the systematic study of the steel-box arch-bridge lags behind. The situation derectly impact on the development of the steel-box arch-bridge in China.Among them, cable suspension system as the key construction methods and processes of steel box tied arch bridge, the applied research is particularly necessary. In this paper according to the years cable fastening system in steel box tied arch bridge in practical application, in Lanzhou City Beach Yellow River Bridge as the engineering background, the studies of cable suspended system in the application of long-span steel box tied arch bridge in the construction process.The main content of the task as follows:(1) Check references of all relevant information on the development of arch made review of the structure and the main characteristics of the steel arch bridge structure and construction methods were introduced, at the same time it introduced the project overview, consisting of cable impounded systems, technical performance and parameters.(2) According to the cable hoisting paper- strayed kNotting construction methods using finite element software MIDAS / CIVIL impounded on the cable system analysis simulations under various load combination, cable tension system for analysis and calculation of the cable saddle The calculation of the components for inspection and analysis of axial force calculated for each type of cable system buckle hanging rods and stress combinations, and the structure in any horizontal displacement overhead loads. Through analysis and calculation, ensure safety rope impounded system throughout the lifting process.(3) The suspension theory and resilient- rigid support method overviews, analyzes the main arch rib hoisting process center beach Yellow River main bridge, according to a place of Cable Tension control idea, center beach Yellow River Bridge using kNotting together a way of construction, which can improve the accuracy and closure rib arch axis of good control.