Wind and Structures

  • 제8권5호
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  • Pages.357-372
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  • 2005
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Wind effects on a large cantilevered flat roof: loading characteristics and strategy of reduction

  • Fu, J.Y. (Department of Building and Construction, City University of Hong Kong) ;
  • Li, Q.S. (Department of Building and Construction, City University of Hong Kong) ;
  • Xie, Z.N. (Department of Civil Engineering, Shantou University)
  • 투고 : 2005.01.17
  • 심사 : 2005.05.25
  • 발행 : 2005.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

Mean and extreme pressure distributions on a large cantilevered flat roof model are measured in a boundary layer wind tunnel. The largest peak suction values are observed from pressure taps beneath conical "delta-wing type" corner vortices that occur for oblique winds, then the characteristics and causes of the local peak suctions are discussed in detail. Power spectra of fluctuating wind pressures measured from some typical taps located at the roof edges under different wind directions are presented, and coherence functions of fluctuating pressures are also obtained. Based on these results, it is verified that the peak suctions are highly correlated with the conical vortices. Furthermore, according to the characteristics of wind loads on the roof, an aerodynamic solution to minimize the peak suctions by venting the leading edges and the corners of the roof is recommended. The experimental results show that the suggested strategy can effectively control the generation of the conical vortices and make a reduction of 50% in mean pressures and 25% in extreme local pressures at wind sensitive locations on the roof.

키워드

참고문헌

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피인용 문헌

  1. Wind effects on the world’s longest spatial lattice structure: Loading characteristics and numerical prediction vol.63, pp.10, 2007, https://doi.org/10.1016/j.jcsr.2006.12.001
  2. Stationary vortices attached to flat roofs vol.98, pp.1, 2010, https://doi.org/10.1016/j.jweia.2009.09.001
  3. Experimental Investigation of Wind Loads on Fish-Shaped Roof Structures vol.639-640, pp.1662-8985, 2013, https://doi.org/10.4028/www.scientific.net/AMR.639-640.434
  4. Experimental investigation of wind pressure characteristics and aerodynamic optimization of a large-span cantilevered roof vol.34, pp.None, 2005, https://doi.org/10.1016/j.istruc.2021.07.034