On the vortex shedding forcing on suspension bridge deck

Vortex-induced vibrations are not negligible while evaluating the aerodynamic and aeroelastic behavior of a long-span suspensionbridge. This kind of forcing, that can produce high vibration levels, occurs at very low reduced velocities concerning low wind speed and high-frequency modes. This work presents results of experimental tests performed on the multibox deck shape of the Messina Strait bridge investigating vortexshedding phenomena and developing a numerical model to reproduce the vortexsheddingforcing. The experimental tests, focused on low reduced velocities, highlight the typical non-linear pattern of the vortexshedding.