Stimulation Analysis For Yanyan Lanzhou Yellow River Bridge Construction Structural Stability Of The Entire Process

Concrete-filled steel tubular (CFST) arch bridge as a new-type bridge is widely applied in China recently. It has the merits of light deadweight, great strength and strong distortion-resistant capacity. It can preferably satisfy requirements such as the materials for construction are saving, erection weight is light, the construction is simple, and bearing capacity is great. Its stability is the most importance element in construction and operation. Concrete-filled steel tubular arch bridge construction is a complex process, in order to guarantee the final bridge into force and linear state meet design requirements, its whole construction process to take its structural stability simulation analysis is necessary.The paper engineering background--- Yanyan Lanzhou Yellow River Bridge is one of these CFST arch bridges. The length of the main bridge is 301m, three-span continuous (87m +127 m +87 m) concrete-filled steel tube frame tied arch pipe arch using cable crane cable-stayed cantilever construction method. Concrete-filled steel tubular arch bridge construction is a complex process, in order to guarantee the final bridge into force and linear state meet design requirements, its whole construction process to take its structural stability simulation analysis is necessary. And this large finite element calculation software ANAS YS establishment of a complete, detailed full-bridge combination of finite element model, aims to explore the analysis of concrete-filled steel tube frame tied arch bridge in the construction process of stability characteristics. This paper focus on critical analysis of the arch construction process (cross-section of the cantilever assembly, which span Long, the inter-filled concrete, beams and bridge lifting state processes) the structural stability of the situation and take a real scientific evaluation and confirmation for the safety of construction provides a basis.