Abstract
An economical new structural system with the aerodynamic stability is necessary to achieve super long span suspension bridges. The dual cable suspension bridge using advanced composites aims to restrain increasing in the mass moment of inertia proportional to the cable self weight and complement decreasing in restoring force by the self weight with introducing the sub-cable prestress. In this paper, the numerical analysis by the direct flutter FEM method is executed to the dual cable suspension bridge of 3000m center span length, then the flutter characteristics and the economics are investigated and discussed in comparison with standard suspension bridge.
