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The aerodynamic characteristics of twin column, high rise bridge towers

  • Ricciardelli, Francesco (The Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering Science, The University of Western Ontario) ;
  • Vickery, Barry J. (The Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering Science, The University of Western Ontario)
  • 발행 : 1998.09.25

초록

The high-rise supporting towers of long-span suspension and cable-stayed bridges commonly comprise a pair of slender prisms of roughly square cross-section with a center-to-centre spacing of from perhaps 2 to 6 widths and connected by one or more cross-ties. The tower columns may have a constant spacing as common for suspension bridges or the spacing may reduce towards the top of the tower. The present paper is concerned with the aerodynamics of such towers and describes an experimental investigation of the overall aerodynamic forces acting on a pair of square cylinders in two-dimensional flow. Wind tunnel pressure measurements were carried out in smooth flow and with a longitudinal intensity of turbulence 0.10. Different angles of attack were considered between $0^{\circ}$ and $90^{\circ}$, and separations between the two columns from twice to 13 times the side width of the column. The mean values of the overall forces proved to be related to the bias introduced in the flow by the interaction between the two cylinders; the overall rms forces are related to the level of coherence between the shedding-induced forces on the two cylinders and to their phase. Plots showing the variation of the force coefficients and Strouhal number as a function of the separation, together with the force coefficients spectra and lift cross-correlation functions are presented in the paper.

키워드

참고문헌

  1. Blessmann J., Riera J.D. (1979), "Interaction effects in neighbouring tall buildings" , Proc. 5th Int. Conf. Wind Engng., Fort Collins, Colorado, 381-395.
  2. Larose G., Zasso A., Melelli S. and Casanova D. (1997), "Field measurements of the wind-induced response of a 254 m high free-standing bridge pylon", 2nd EACWE, Genova, Italy, 1553-1560.
  3. Reinhold T.A., Tieleman H.W., Maher F. (1977), "Interaction of square prisms in two flow fields", J. Ind. Aero., 2(3), 223-241. https://doi.org/10.1016/0167-6105(77)90024-1
  4. Ricciardelli F. (1994), "Aerodynamics of a pair of square cylinders", M.E.Sc. Thesis, Faculty of Engineering Science, The University of Western Ontario, London, Ontario, September.
  5. Ricciardelli F., Vickery B.J. (1994), "Wind Loads on a pair of long prisms of square cross-section", IN-VENTO-94, Proc. 3rd Nat. Italian Conf. Wind Engng., Roma, October, 101-120.
  6. Ricciardelli F. (1996), "Wind induced vibrations of high-rise bridge towers", Eurodyn '96, Proc. 3rd European Conf. on Struct. Dynamics, Firenze, Italy, June, 325-332.
  7. Ricciardelli F. (1997), "Prediction of the response of suspension and cable-stayed bridge towers to wind loading", J. Wind Engng. Ind. Aero. 64, 145-159.
  8. Sakamoto H., Haniu H. (1988), Aerodynamic forces acting on two square prisms placed vertically in a turbulent boundary layer", J. Wind Engng. Ind. Aero., 31, 41-66. https://doi.org/10.1016/0167-6105(88)90187-0
  9. Scruton C., Walshe D.E. (1963), "An investigation of the aerodynamic stability of the towers proposed for the River Severn Suspension Bridge," NPL Aero Report 1052.
  10. Shiraishi N., Matsumoto M., Shirato H., Ishizaki H. (1988), "On aerodynamic stability effects for bluff rectangular cylinders by their corner-cut" , J. Wind Engng. Ind. Aero., 28, 371-380. https://doi.org/10.1016/0167-6105(88)90133-X
  11. Shiraishi N., Matsumoto M., Shirato H. (1986), "On aerodynamic instabilities of tandem structures" , J. Wind Eng. Ind. Aero., 23, 437-447. https://doi.org/10.1016/0167-6105(86)90061-9
  12. Takeuchi T. (1990), "Effects of geometrical shape on vortex-induced oscillations of bridge tower" , J. Wind Eng. Ind. Aero, 33, 359-368. https://doi.org/10.1016/0167-6105(90)90051-D

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