Wind and Structures

  • 제26권4호
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  • Pages.253-266
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  • 2018
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Aerodynamics and rain rivulet suppression of bridge cables with concave fillets

  • Burlina, Celeste (Technical University of Denmark) ;
  • Georgakis, Christos T. (Aarhus University) ;
  • Larsen, Soren V. (FORCE Technology) ;
  • Egger, Philipp (VSL International Ltd.)
  • 투고 : 2017.09.20
  • 심사 : 2018.01.27
  • 발행 : 2018.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the aerodynamic performance of two new cable surfaces with concave fillets (strakes) is examined and compared to plain, dimpled and helically filleted surfaces. To this end, an extensive wind-tunnel campaign was undertaken. Different samples with different concave fillet heights for both new surfaces were tested and compared to traditional surfaces in terms of aerodynamic forces (i.e. drag and lift reduction) and rain-rivulet suppression. Furthermore, flow visualization tests were performed to investigate the flow separation mechanism induced by the presence of the concave fillet and its relation to the aerodynamic forces. Both new cable surfaces outperformed the traditional surfaces in terms of rain-rivulet suppression thanks to the ability of the concave shape of the fillet to act as a ramp for the incoming rain-rivulet. Furthermore, both new surfaces with the lowest tested fillet height were found to have drag coefficients in the supercritical Reynolds range that compare favorably to existing cable surfaces, with an early suppression of vortex shedding.

키워드

참고문헌

  1. Acampora, A. and Georgakis, C.T. (2011), "Recent monitoring of the Oresun Bridge: Rain-wind induced cable vibrations", Proceedings of the 13th International Wind Engineering Conference, Amsterdam.
  2. Burlina, C., Georgakis, C.T., Larsen, S.V. and Egger, P. (2016), "Comparative analysis of bridge cables with concave fillets", Proceedings of the 1st International Symposium on Flutter and its Application (ISFA2016), Tokyo, Japan.
  3. Burlina, C., Georgakis, C.T., Larsen, S.V. and Egger, P. (2016), "Optimization of bridge cables with concave fillets", Proceedings of the 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), Boston, USA.
  4. CBC News, British Columbia (2012). "Port Mann Bridge closure unacceptable, says minister", http://www.cbc.ca/news/canada/british-columbia/story/2012/12/20/bc-port-mann-ice.html (Dec. 20, 2012)
  5. Chen, Z.Q. (2011), Hunan University, Jul 2011. Cable vibration incidence of the Jintang Bridge, private communications.
  6. Choi, H., Jeon, W. and Kim, J. (2008), "Control of flow over a bluff body", Annu. Rev. Fluid Mech., 40, 113-139. https://doi.org/10.1146/annurev.fluid.39.050905.110149
  7. Choi, J., Jeon, W. and Choi, H. (2006), "Mechanism of drag reduction by dimples on a sphere", AIP Phys. Fluid., 18, 041702. https://doi.org/10.1063/1.2191848
  8. Christiansen, H., Jakobsen, J.B., Macdonald, J.H.G., Larose, G.L and, Bosch, H.R. (2015), "Aerodynamics of stay cable with helical fillets - Part I: stability and load characteristics", In: preprint submitted Journal of Wind Eng. Ind. Aerodyn.
  9. Cooper, K., Mercke, E. and Wiedemann, J. (1999), "Improved blockage corrections for bluff-bodies in closed and open wind tunnels", Proceedings of the 10th International Conference Wind Engineering, Copenhagen, June.
  10. Coesentino, N., Flamand, O. and Ceccoli, C. (2003), "Rain-windinduced vibration of inclined stay cables. Part I: experimental investigation and physical explanation", Wind Struct., 6(6), 471-484. https://doi.org/10.12989/was.2003.6.6.471
  11. Ekmekci, A. and Rockwell, D. (2010), "Effects of a geometrical surface disturbance on flow past a circular cylinder: a largescale spanwise flow", J. Fluid Mech., 665, 120-157. https://doi.org/10.1017/S0022112010003848
  12. Flamand, O. (1995), "Rain-wind induced vibration of cable", J. Wind Eng. Ind. Aerod., 57(2-3), 353-340. https://doi.org/10.1016/0167-6105(94)00113-R
  13. Flamand, O. and Boujard, O. (2009), "A comparison between dry cylinder galloping and rain-wind induced excitation", Proceeding of the 5th European & African Conference on Wind Engineering, Florence.
  14. Georgakis, C.T., Koss, H.H. and Ricciardelli, F. (2009), "Design specifications for a novel climatic wind tunnel for the testing of structural cables", Proceedings of the 8th International Symposium on Cable Dynamics, Paris, France, September.
  15. Gimsing, N.J. and Georgakis, CT. (2012), Cable Supported Bridges Concept and Design, 3rd Ed., John Wiley & Sons Ltd.
  16. Hikami, Y. and Shiraishi, N. (1988), "Rain-wind-induced vibrations of cables in cable stayed bridges", J. Wind Eng. Ind. Aerod., 29, 409-418. https://doi.org/10.1016/0167-6105(88)90179-1
  17. Hojo, T., Yamazaki, S. and Okada, H. (2000), Development of Lowdrag Aerodynamically Stable Cable with Indented Processing, Nippon Steel Corporation, July (Special Issue on Steel Structure 82), URL/http://www.nsc.co.jp/en/tech/report/pdf/8203.pdfS.
  18. Hojo, T., Yamazaki, S., Miyata, T. and Yamada, H. (1994), "Experimental study on aerodynamic characteristics of cables patterned surfaces", J. Struct. Eng., 40A.
  19. Hojo, T., Yamazaki, S., Miyata, T. and Yamada, H. (1995), "Development of aerodynamically stable cables for cable-stayed bridges having low resistance", Bridge. Foundations Eng., 6, 27-32, in Japanese.
  20. Katsuchi, H. (2011), Yokohama National University, Jul 2011. Cable vibration incidence with pattern-indented surface, private communication.
  21. Katsuchi, H. andYamada, H. (2011), Dry galloping characteristics of indented stay cables in turbulent flow. In: 9th International Symposium on Cable Dynamics, Shanghai, China.
  22. Katsuchi, H., Yamada, H., Sasaki, E., Inamori, K. and Kaga, S. (2010), "Study on dry-galloping of inclined cable with real indented surface", Proceedings of the 21st National Symposium on Wind Engineering, Japan.
  23. Kleissl, K. and Georgakis, C.T. (2011a), "Comparison of the aerodynamics of bridge cables with helical fillets and a patternindented surface in normal flow", Proceedings of the 13th International Conference on Wind Engineering, Amsterdam, Netherland.
  24. Kleissl, K. and Georgakis, C.T. (2011b), "Comparison of the aerodynamics of yawed bridge cables with helical fillets and a pattern-indented surface", Proceedings of the 9th International Symposium on Cable Dynamics, Shanghai, China.
  25. Kleissl, K. (2013), Cable aerodynamic control. Wind tunnel studies. PhD Thesis. Technical University of Denmark -DTU. Kgs Lyngby, Denmark.
  26. Larose, G.L. and Smitt, L.W. (1999), "Rain/wind induced vibrations of parallel stay cables", Proceedings of the IABSE Conference, Sweden.
  27. Matsumoto, M., Shirashi, N. and Shirato, H. (1992), "Rain-windinduced vibration of cables of cable-stayed bridges", J. Wind Eng. Ind. Aerod., 41-42, 2011-2022.
  28. Matsumoto, M., Saitoh, T., Kitazawa, M. et al., (1995), "Response characteristics of rain-wind-induced vibration of stay-cables of cable-stayed bridges", J. Wind Eng. Ind. Aerod., 57, 323-333. https://doi.org/10.1016/0167-6105(95)00010-O
  29. Matsumoto, M. (1998), "Observed behavior of proto type cable vibration and its generation mechanism, In: Bridge Aerodynamics", Proceedings of the International Symposium on Advances in Bridge Aerodynamics.
  30. Matsumoto, M., Daito, Y., Kanamura, T., Shigemura, Y., Sakuma, S. and Ishizaki, H. (1998), "Wind-induced vibration of cables of cable-stayed bridges", J. Wind Eng. Ind.Aerod., 74-76, 1015-1027. https://doi.org/10.1016/S0167-6105(98)00093-2
  31. Matteoni, G. and Georgakis, C.T. (2013), "Effects of surface roughness and cross-sectional distortions on the wind-induced response of bridge cables in dry conditions", Proceedings of the 6th European and African Conference on Wind Engineering, Cambridge, United Kingdom.
  32. Miyata, Y., Yamada, H. and Hojo, T. (1994), "Experimental study on aerodynamic characteristics of cables with patterned surface", J. Struct. Eng., 40, 1065-1076.
  33. Miyata, T., Katsuchi, H. and Tamura, Y. (1999), "Comprehensive discussion on structural control for wind-induced responses of bridges and buildings", Wind Engineering into the 21st Century, Proceedings of the 10th International Conference on Wind Engineering.
  34. Nebres, J.V. and Batill, S.M. (1992), "Flow about cylinders with helical surface protrusions", 30th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada 92 (0540).
  35. Park, H., Lee, D., Jeon, W., Hahn, S., Kim, J., Choi, J. and Choi, H. (2006), "Drag reduction in flow over a two-dimensional bluff body with a blunt trailing edge using a new passive device", J. Fluid Mech., 563, 389-414. https://doi.org/10.1017/S0022112006001364
  36. Son, K., Choi, J., Jeon, W., Choi, H. (2011), "Mechanism of drag reduction by a surface trip wire on a sphere", J. Fluid Mech., 672, 411-427. https://doi.org/10.1017/S0022112010006099
  37. Yagi, T., Okamoto, K., Skski, I., Koroyasu, H., Liang, Z., Narita, S. and Shirato, H. (2011), "Modification of surface configurations of stay cables for drag force reduction and aerodynamic stabilization", Proceedings of the 13th International Conference on wind Engineering, Amsterdam, The Netherlands.
  38. Yamauchi, K., Uejima, H. and Kuroda, S. (2008), "An investigation of the aerodynamic characteristics of cable with surface ribs", Proceedings of the 6th International Colloquium on Bluff Bodies Aerodynamics and Applications, Milan, Italy.
  39. Zdravkovich, M.M. (1981), "Review and classification of various aerodynamic and hydrodynamic means for suppressing vortex shedding", J. Wind Eng. Ind. Aerod., 7(2), 145-189. https://doi.org/10.1016/0167-6105(81)90036-2
  40. Zdravkovich, M.M. (1984), "Reduction of effectiveness of means for suppressing wind-induced oscillation", Eng. Struct., 6(4), 344-349. https://doi.org/10.1016/0141-0296(84)90033-6
  41. Zdravkovich, M.M. (1997), Flow around circular cylinders vol.1: fundamentals, Oxford Science Publications, 1997.