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논문 기본 정보

자료유형
학술저널
저자정보
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)
저널정보
테크노프레스 Wind & structures Wind & structures 제1권 제3호
발행연도
1998.1
수록면
225 - 241 (17page)

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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.

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