Study On Design Method Of Composite Arch Bridge Constructed By Vertical Turning

In this paper,Structure optimization theories were applied to develop steel-concrete composite arch bridges erected by rotating down vertically the arch rib section and arches the column spacing optimization procedure; Introduced the steel-concrete composite arch bridges' computational methods; Researched and analysed to the related detail of steel-concrete composite arch bridges; Finally introduced the design characteristics and main construction technology of zaodu bridge which is steel-concrete composite arch bridges' site project. The main content includes:1 st, the structure optimization research of steel-concrete composite arch bridges erected by rotating down vertically .Proposed the structure style of steel-concrete composite arch bridges erected by rotating down vertically , analysed the main arch sectional size and arches the design variable which the column spacing optimizes, established the optimization mathematical model, the genetic algorithm were applied to the arched bridge to optimize, Visual C++6.0 were used to develop structure optimization design procedure which contain structure analysis module.2nd, the Structure computational method research of steel-concrete composite arch bridges erected by rotating down vertically .Introduced trussing of the finite element basic principle, proposed the finite element analysis model establishment method of steel-concrete composite arch bridges, summarized the stress characteristic to divide stage structure and the main arch checking calculation stipulation of the steel-concrete composite arch bridges structure.3rd, the detail structure research of steel-concrete composite arch bridges.Based on the structure conceptual design, detailed the steel-concrete composite arch bridges erected by rotating down vertically the detail structure, discussed the partial unique feature of the steel-concrete composite arch bridges.4th, the design example of steel-concrete composite arch bridges erected by rotating down vertically pilot project.Through pilot project of Wansheng Zaodu bridge, introduced in detail the unique feature and main construction technology of the steel-concrete composite arch bridges erected by rotating down vertically' site project.