Abstract
An aerodynamically stable pentagonal shape bridge deck was proposed for long-span cable-supported bridges. The top and bottom deck flow are controlled by adjusting the top deck curb position, known as separation interference method and the bottom plate slope, respectively. In this paper, it is tried to elucidate the influence of one of the flow features i.e. top deck leading edge flow separation on flutter instability. Two pentagonal bridge decks having a bottom plate slope of 11° with and without curbs were analyzed. Firstly, static two-dimensional unsteady RANS simulation was carried out for those two sections to visualize the flow filed. Then, forced vibration simulations were conducted to extract the flutter derivatives and aerodynamic damping were calculated. Finally, analytical results were compared among them.
