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Wind and Structures Volume 28, Number 5, May 2019 , pages 331-345 DOI: https://doi.org/10.12989/was.2019.28.5.331 |
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Influence of geometric configuration on aerodynamics of streamlined bridge deck by unsteady RANS |
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Md. N. Haque, Hiroshi Katsuchi, Hitoshi Yamada and Haeyoung Kim
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| Abstract | ||
| Long-span bridge decks are often shaped as streamlined to improve the aerodynamic performance of the deck. There are a number of important shaping parameters for a streamlined bridge deck. Their effects on aerodynamics should be well understood for shaping the bridge deck efficiently and for facilitating the bridge deck design procedure. This study examined the effect of various shaping parameters such as the bottom plate slope, width ratio and side ratio on aerodynamic responses of single box streamlined bridge decks by employing unsteady RANS simulation. Steady state responses and flow field were analyzed in detail for wide range of bottom plate slopes, width and side ratios. Then for a particular deck shape Reynolds number effect was investigated by varying its value from 1.65x104 to 25x104. The aerodynamic response showed very high sensitivity to the considered shaping parameters and exhibited high aerodynamic performance for a particular combination of shaping parameters. | ||
| Key Words | ||
| streamlined bridge deck; bottom plate slope; width ratio; aerodynamic force coefficients; flow field; pressure distribution; Reynolds number; Side ratio; CFD and unsteady RANS | ||
| Address | ||
| Md. N. Haque: Department of Civil Engineering, East West University, A/2 Jahurul Islam Avenue, Jahurul Islam City, Aftabnagar, Dhaka-1212, Bangladesh; Department of Civil Engineering, Yokohama National University, 79-1, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan Hiroshi Katsuchi, Hitoshi Yamada and Haeyoung Kim: Department of Civil Engineering, Yokohama National University, 79-1, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan | ||