%0 Journal Article
%T Vortex
%A Haojun Tang
%A Jinsong Jiang
%A KM Shum
%A Qiyu Tao
%J Advances in Structural Engineering
%@ 2048-4011
%D 2019
%R 10.1177/1369433218778656
%X To improve the flutter stability of a long-span suspension bridge with steel truss stiffening girder, two vertical stabilizers of which the total height reaches to approximately 2.9£żm were planned to install on the deck. As the optimized girder presents the characteristics of a bluff body more, its vortex-induced vibration needs to be studied in detail. In this article, computational fluid dynamics simulations and wind tunnel tests are carried out. The vortex-shedding performance of the optimized girder is analyzed and the corresponding aerodynamic mechanism is discussed. Then, the static aerodynamic coefficients and the dynamic vortex-induced response of the bridge are tested by sectional models. The results show that the vertical stabilizers could make the incoming flow separate and induce strong vortex-shedding behind them, but this effect is weakened by the chord member on the windward side of the lower stabilizer. As the vortex-shedding performance of the optimized girder is mainly affected by truss members whose position relationships change along the bridge span, the vortex shed from the girder can hardly have a uniform frequency so the possibility of vortex-induced vibration of the bridge is low. The data obtained by wind tunnel tests verify the results by computational fluid dynamics simulations
%K aerodynamic interference
%K high vertical stabilizers
%K suspension bridge
%K truss girder
%K vortex-induced vibration
%K vortex-shedding performance
%U https://journals.sagepub.com/doi/full/10.1177/1369433218778656