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Wind and Structures
  Volume 25, Number 2, August 2017 , pages 157-176

Effect of beam slope on the static aerodynamic response of edge-girder bridge-deck
Hoyeop Lee, Jiho Moon, Nakhyun Chun and Hak-eun Lee

    2-edge box girder bridges have been widely used in civil engineering practice. However, these bridges show weakness in aerodynamic stability. To overcome this weakness, additional attachments, such as fairing and flap, are usually used. These additional attachments can increase the cost and decrease the constructability. Some previous researchers suggested an aerodynamically stabilized 2-edge box girder section, giving a slope to the edge box instead of installing additional attachments. However, their studies are limited to only dynamic stability, even though static aerodynamic coefficients are as important as dynamic stability. In this study, focus was given to the evaluation of static aerodynamic response for a stabilized 2-edge box girder section. For this, the slopes of the edge box were varied from 0 to 17 and static coefficients were obtained through a series of wind tunnel tests. The results were then compared with those from computational fluid dynamics (CFD) analysis. From the results, it was found that the drag coefficients generally decreased with the increasing box slope angle, except for the specific box slope range. This range of box slope varied depending on the B/H ratio, and this should be avoided for the practical design of such a bridge, since it results in poor static aerodynamic response.
Key Words
    static aerodynamic response; 2-edge box-girder bridge; wind tunnel test; CFD analysis
Hoyeop Lee, Nakhyun Chun and Hak-eun Lee: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, South Korea
Jiho Moon: Department of Civil Engineering, Kangwon National University, Chuncheon-si, Gangwon-do 24341, South Korea


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