Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Prediction of Aerodynamic Coefficients of Bridges Using Computational Fluid Dynamics

전산유체역학 해석에 의한 교량 단면의 공력 특성값 추정

  • Hong, Young-Kil (Department of Civil Engineering, Hallym Polytechnic University)
  • 홍영길 (한림성심대학교 토목과)
  • Received : 2012.10.29
  • Accepted : 2013.01.09
  • Published : 2013.02.28
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Abstract

Aerodynamic characteristics of cross section shape is an important parameter for the wind response and structural stability of long span bridges. Numerical simulation methods have been introduced to estimate the aerodynamic characteristics for more detailed flow analysis and cost saving in place of existing wind tunnel experiment. In this study, the computational fluid dynamics(CFD) simulation and large eddy simulation( LES) technique were used to estimate lift, drag and moment coefficients of four cross sections. The Strouhal numbers were also determined by the fast Fourier transform of time series of the lift coefficient. The values from simulations and references were in a good agreement with average difference of 16.7% in coefficients and 8.5% in the Strouhal numbers. The success of the simulations is expected to attribute to the practical use of numerical estimation in construction engineering and wind load analysis.

Keywords

References

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