ABSTRACT The present study aims to evaluate the static aerodynamic force coefficients required for the design of cable-stayed bridge against wind loads. A section of a bridge deck model consisting of three T- beams as deck cross section, having a geometric scale of 1:50 was selected for this purpose. Simulation of the flow around bridge deck was done using Computational Fluid Dynamics (CFD), through ANSYS/FLOTRAN software package which discretises the governing equations based on finite element method (FEM). Different turbulence models along with suitable numerical techniques were used for this analysis. CFD calculations through discrete vortex method (DVM) were also carried out in the aero-class of software RM2006, which is used exclusively for design of bridges. The bridge deck model with anti-crash barriers was initially subjected to a uniform wind speed of 14 m/s. The static aerodynamic forces-lift, drag and moment - were computed for seven different angles of wind incidence acting across its longitudinal direction. The numerically obtained aerodynamic force coefficients from ANSYS/FLOTRAN and RM2006 were compared with the experimental results obtained based on boundary layer wind tunnel studies.
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