Stability Analysis Based Slip-theory Of Large Span Concrete-filled Steel Tube Arch Bridge

For long-span concrete-filled steel tube arch bridge,because of its relatively weak rigidity in the external factors,in addition to axial force,the structure also suffers the bending moment and torque moment.Therefore,the study to determine its limiting force in carrying capacity is essential to engineering design.The hoop force of the steel tube is the key factor to strengthen the bearing capacity of the core area.And the Bonding force between the concrete and steel pipe ensures The hoop force between the two Materials working effective.However,the current research about the adhesive force between concrete and steel pipe on its stability are relatively few,in additionally,the study of the two materials play a role together is impacted by the experimental device,the development of materials theories also constraints the researchers conducting theoretical research on the stability.To linking up with WuShan Xinlongmen Bridge,concrete-filled steel tube arch bridge, the paper introduces the theory of stability about the arch bridge and its stability analysis and it mainly study and discuss problems in the following areas:Firstly,the mechanical properties and stability theories of Concrete-filled steel tubular structure.Papers discuss the concrete-filled steel tube components on the mechanical properties and the buckling stability. Secondly,Paper also analyzed the bonding theory about the concrete-filled steel tube components and simulated the bond-slip unit.Thirdly,stability analysis of Concrete-filled steel tube arch bridge,using the Large-scale FEM software built up the arch model with adding bonding unit,which simulated the bonding between steel pipe and concrete.The papers also had a three-dimensional numerical analysis on the bridge and got the security factor,which researches the bonding of two materials for improving the stability of the hoop force.