DOI QR코드

DOI QR Code

Wind Loading Combination considering Response Correlations between Acrosswind and Torsional Directions

풍직각방향과 비틀림방향의 응답상관을 고려한 풍하중 조합

  • 김원술 (동경공예대학교 풍공학연구센터) ;
  • 김용철 (동경공예대학교 건축학과)
  • Received : 2014.12.31
  • Accepted : 2015.03.18
  • Published : 2015.04.30

Abstract

The wind tunnel test was conducted to investigate characteristics of fluctuating wind forces acting on tall buildings for various side ratios (D/B=1.0, 1.1, 1.2, 1.3, 2.0 and 3.0) and different terrain roughnesses. Further, the wind load combination was examined by the correlation of the displacement response between acrosswind and torsional directions through Spectral Modal Analysis Method and Time History Analysis Method. As a result, there was no significant effect of the changing of terrain roughnesses on fluctuating moment coefficients for acrosswind and torsional directions, but they were varied with the changing of wind directions. Acrosswind overturning moment coefficients were highly correlated with the torsional moment coefficient with the increase in wind directions. The response and correlation obtained by Time History Analysis were good agreement with those of Spectral Modal Analysis. Also, the response correlation between acrosswind and torsional directions was highly affected by natural frequency ratios. Hence, the wind load combination for acrosswind and torsional directions shall be considered that when the natural frequencies between acrosswind and torsional directions are close to each other.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. 황성권, 하영철, 풍하중을 받는 고층건축물의 합리적인 수평하중 조합 방법에 관한 연구, 한국풍공학회 학술대회, 2010
  2. 김용철, 김상대, 윤성원, 비정형 초고층 건물의 합리적인 풍하중 산정, 대한건축학회논문집 구조계 30(4), 2014
  3. Tamura, Y., Kim, Y. C., Kikuchi, H., Hibi, K., Correlation and combination of wind force components and responses, Journal of Wind Engineering and Industrial Aerodynamics, 125, 2014
  4. Tallin, A., Elingwood, B., Wind induced lateral-torsional motion of building, Joural of Structural Engineering, 111, 1985
  5. 하영철, 건축구조기준(KBC 2013) 풍하중(안)의 주요 개정내용, 한국풍공학회지, 16(2), 2012
  6. Architectural Institute of Japan (AIJ, 2004), Chapter 6: Wind Loads, Recommendations for Loads on Buildings, 2004
  7. 김원술, 타무라 유키오, 요시다 아키히토, 인접건축물이 고층건축물의 외장재용 풍하중에 미치는 영향, 대한건축학회논문집 구조계 26(1), 2010
  8. 국토해양부 고시 건축구조설계기준(KBC 2009), 대한건축학회, 2010
  9. Agemori, Y., Choi, H., Kanda, J., Characteristics of fluctuating wind force on 3D cylinders, National Symposium of Wind Engineering, 1990 (In Japanese)
  10. 최심국, 길용식, 김동우, 하영철, 노풍도에 따른 고층건축물의 풍직각방향 변동풍력의 특성, 한국풍공학회지, 9(1), 2005
  11. Asami, Y., Combination method for wind loads on high-rise buildings, National Symposium of Wind Engineering, 2000 (In Japanese)