Advances in Constructional Engineering

Under wind loads, especially at specific wind speeds, long-span cable-stayed bridges are prone to vortex-induced vibrations, which affect the structural safety and comfort of the bridge. This paper aims to study and explore the suppression measures for vortex-induced vibrations of long-span cable-stayed bridges, and proposes a variety of effective control strategies, including aerodynamic shape optimization, damping device design, and application of vibration control materials, etc. The applicability and effects under different conditions are analyzed. The combination of reasonable design improvements and technological means can significantly reduce the impact of vortex-induced vibrations on the bridge, ensuring the long-term stability and safety of the bridge. Finally, combined with numerical simulation and experimental verification, effective solutions applicable to practical engineering are proposed.

Long-span cable-stayed bridge; Vortex-induced vibration; Suppression measure; Aerodynamics; Damping device