Discussion of 800m Composite Bridge with CFST Flying Swallow Arch and Self-anchored Suspension Cable

In view of the demand 800 meters Super Long Span CFST arch bridge, composite bridge flying swallow and self-anchored suspension cable is proposed. The thrust flying-bird tension are balanced, forming a self-balanced structure system. rib mainly stressed, supplemented by system, which works together has complementary advantages. Using single leaf hyperboloid variable section steel tube four limb space truss structure, self-weight mid span reduced, risk construction hoisting size at foot increased, mass center stiffness effectively stability super long concrete-filled increased. Combined with actual project, parameters designed, Midas finite element model established, internal force analysis calculation, modal buckling carried out, superiority structural technical measures verified.