플레이트거더의 정적 공기력계수에 미치는 단면형상의 영향에 관한 연구
Study on the Effects of Sectional Shapes on the Aerodynamic Forces of Plate-Girder Sections
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In this study, the effects of sectional shape on aerodynamic force coefficients of plate girder are investigated through wind-tunnel tests. As the experimental models, 36 types of sections are employed where the range of aspect ratio is 2.5 to 15 and bracket length and number of main girder are changed. As the results of experiments, the reattachment of separating flow form leading edge is strongly affects on the characteristics of aerodynamic force coefficients. The maximum drag coefficient in the range of α=-5°∼+5° exceeds the reference value from Korean Bridge Design Specification. The maximum and minimum lift coefficient is appeared as 1.0 and -0.7, respectively. Basing on results of the study, the drag and lift coefficients are suggested as the design wind loads for plate girder sections. The gradients of aerodynamic force coefficients at attack angle α=0° are also investigated for aeroelasticity analysis of plate girder.
Abstract
In this study, the effects of sectional shape on aerodynamic force coefficients of plate girder are investigated through wind-tunnel tests. As the experimental models, 36 types of sections are employed where the range of aspect ratio is 2.5 to 15 and bracket length and number of main girder are changed. As the results of experiments, the reattachment of separating flow form leading edge is strongly affects on the characteristics of aerodynamic force coefficients. The maximum drag coefficient in the range of α=-5°∼+5° exceeds the reference value from Korean Bridge Design Specification. The maximum and minimum lift coefficient is appeared as 1.0 and -0.7, respectively. Basing on results of the study, the drag and lift coefficients are suggested as the design wind loads for plate girder sections. The gradients of aerodynamic force coefficients at attack angle α=0° are also investigated for aeroelasticity analysis of plate girder.
참고문헌 (7)
- (사)한국도로교통협회, "건설교통부제정 도로교설계기준" (2005)
- AASHTO, "AASHTO LRFD Bridge Design Specifications" (2004)
- European Committee for Standardization, "Eurocode 1 : Actions on Structures - General actions - Part 1-4 Wind actions" (2004)
- (사)일본도로협회, "도로교시방서·동해설" (2002)
- (사)일본도로협회, "도로교내풍설계편람(개정판)" (2007)
- Simiu, E., "Design of Building and Bridges for Wind" (2006), John Wiely & Sons, Inc
- 김희덕, "플레이트거더단면의 정적 공기력계수에 미치는 단면특성의 영향", 한국풍공학회학술대 회논문집, pp.183~189 (2008)