Wind and Structures

  • 제18권3호
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  • Pages.295-320
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  • 2014
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Power spectra of wind forces on a high-rise building with section varying along height

  • Huang, D.M. (School of Civil Engineering, Central South University) ;
  • Zhu, L.D. (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Chen, W. (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2012.07.12
  • 심사 : 2013.12.27
  • 발행 : 2014.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

The characteristics of amplitudes and power spectra of X axial, Y axial, and RZ axial (i.e., body axis) wind forces on a 492 m high-rise building with a section varying along height in typical wind directions are studied via a rigid model wind tunnel test of pressure measurement. Then the corresponding mathematical expressions of power spectra of X axial (across-wind), Y axial (along-wind) and torsional wind forces in $315^{\circ}$ wind directions are proposed. The investigation shows that the mathematical expressions of wind force spectra of the main structure in across-wind and torsional directions can be constructed by the superimposition of an modified wind spectrum function and a peak function caused by turbulent flow and vortex shedding, respectively. While that in along-wind direction can only be constructed by the former and is similar to wind spectrum. Moreover, the fitted parameters of the wind load spectra of each measurement level of altitude are summarized, and the unified parametric results are obtained. The comparisons of the first three order generalized force spectra show that the proposed mathematical expressions accord with the experimental results well.

키워드

참고문헌

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