Configuration Study on 5,000-Meter Hyperbolic Parabolic Spatial Cable Suspension Bridge

This article aims to solve the wind stability problem of the super-long-span suspension bridge. According to the characteristics of the ruled surface of the hyperbolic paraboloid, the structure system of the hyperbolic parabolic space mixed cable suspension bridge is proposed. On the basis of the parallel cable suspension bridge, a carbon fiber hyperbolic parabolic space cable network is added. The parallel steel cables bear the vertical load. The hyperbolic parabolic carbon fiber space cable improves the spatial rigidity of the suspension bridge. The two cable systems work together and complement each other. Combined with the engineering background of a 5000 m Strait Suspension Bridge, the configuration study of the hyperbolic parabolic space cable suspension bridge was carried out, and the ANSYS finite element analysis model was established to analyze and study the structural internal force and dynamic modal characteristics. The research shows that the hyperbolic parabolic space mixed cable suspension bridge has excellent spatial stiffness and wind stability performance, its torsional frequency and torsional frequency ratio are significantly improved, the critical wind speed of flutter is greatly improved, and the long-span suspension bridge is fundamentally solved Wind stability problem.