The Analysis About Time,Geometry,Temperature To Long_Span Concrete Filled Steel Tubular Arch Bridges

At present, with the development of uses of new materials and new methods of construction & erection , the concrete-filled tubular (CFST) arch bridges are in the upsurge of building. The Wu Gorge Yangtze River Bridge(a 460m span,under construction), is the most long-span middle-supported CFST arch bridge and the Yonghe Bridge in the city of Nanning(a 350m calculable span) is the longest span down-supported CFST arch bridge. Meanwhile, many problems need to be solved impendingly. The same way as the analysis of the shrinkage and creep to the reinforced concrete is adopted to calculate the infulences of the shrinkage and creep to the CFST. Which cause the suspicions to the validty,economy,credibility to such bridge designs. As a whole, the researches to CFST bridges are on the first stage.This thesis focuses on the infulences of the shrinkage and creep to CFST. According to examination,theoretic analysis and programmer way , I do some researches and give effectively calculational methods and design finite element programmes. According to the theories of the the geometrical nonlinearities,temperature changings,time dependent effects, the more analyses are done to Wu Gorge Yangtze River Bridge .All the above works are significant to the future design and analysis of the CFST arch bridges.