Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Effects of Number of Sides on Aerodynamic Characteristics of Super-Tall Buildings

단면의 변의 수가 초고층 건물의 공력특성에 미치는 영향

  • Kim, Yong-Chul (Korea University, School of Civil, Environmental, and Architectural Engineering) ;
  • Bandi, Eswara Kumar (Tokyo Polytechnic University, Wind Engineering Research Center) ;
  • Tamura, Yukio (Tokyo Polytechnic University, Wind Engineering Research Center) ;
  • Yoshida, Akihito (Tokyo Polytechnic University, Wind Engineering Research Center) ;
  • Yoon, Sung-Won (Seoul National University of Science & Technology, School of Architecture)
  • Received : 2013.08.15
  • Accepted : 2013.09.04
  • Published : 2013.09.15
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Abstract

A series of wind tunnel tests were conducted on 7 super-tall buildings with various polygon cross-sections, including triangle, square, pentagon, hexagon, octagon, dodecagon, and circular. The primary purpose of the present study is to investigate the effect of increasing number of sides on aerodynamic characteristics for super-tall buildings. Wind tunnel tests were conducted under the turbulent boundary layers whose power-law exponent is 0.27. Fluctuating wind pressures from more than 200 pressure taps were recorded simultaneously, and time series of overturning moments were calculated considering tributary area of each pressure tap. The results show that the overturning moment coefficients and the spectral values decrease with increasing number of sides, and the largest mean and fluctuating overturning moments were found for the triangular super-tall building, and the largest spectral values were found for the square super-tall building. The analysis should be conducted more in detail, but currently it can be roughly said that there seems to be a little differences in the aerodynamic characteristics for the super-tall buildings whose number of sides is larger than 5 or 6.

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References

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