Construction Simulation And Stability Analysis Of Large Span Of Concrete-filled Steel Tube Skeleton Arch Bridge

As our country's geographical features of the landscape, mountain more, it is more suitable for rotary construction. Rotating construction in the past few years in China has witnessed rapid development ,also the span and the half-weight system of Swinging Bridge has increased continuously, which lead to increased technical difficulties and more risk .it has a lot of outstanging advantages to combine rotation construction to contrete-filled steel tube. such as lighter and more intensity. So that more and more rotation construction come out. there are still some key problems to be solved, such as it is difficult to calculate the cable tension ,forecast of the arch and Rotating stage structure and stability of the stability of two casting. Because of the growing weight of the Swinging system, sometimes the weight of the cave arch bridge in the process of turning reach more than 5000 tons, in order to ensure the safety of the bridge construction, we have to monitor the bridge construction.This paper took the cave stiff steel tube skeleton serious Arch Bridge as the backdrop, the bridge which is lie in outbound traffic Highway of XiLuodu hydropower station.Firstly it introduced the development at home and abroad and construction technology of the Arch Bridge rotary construction , and then several key issues of the rotating construction were discussed.In this paper, finite element software MIDAS did the simulation analysis on the stage of Swinging Bridge, calculated the overall stability of semi-state arch bridge away from bracket, Unknown load factor used to determine the appropriate cable force away from bracket, also calculated and analyzed the stress and strain ,the deformation in the stage of structure closure and turning, to prevent structural stress deformation in the swivel stage in excessive damage to the structure and provide a theoretical basis for smooth closure; At the same time, the cable force, stress and strain and displacement have also been monitored. and we also analyzed and compared the results with monitoring data, all that provided some references for similar bridges in the future ;Finally, we reviewed the structural stability of the arch on the status quo, from the long-span bridges to the stability theory leads to the stability of the basic theory and the theory of stability for a number of ways, we calculated buckling safety factor of the structure in two concrete pouring process after Swinging Bridge closure by the ANSYS procedures considered in line flexibility and non-linear geometry of the circumstances. Research shows that non-linear geometry and stability analysis of the results of a more flexible stability analysis of the results close to the bridge steady decline in small factor. Through two concrete pouring on the stability of the order, eventually identified a suitable placement order.