Wind and Structures

Techno-Press (테크노프레스)
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Correlation of wind load combinations including torsion on medium-rise buildings

  • Keast, D.C. (Arup Group) ;
  • Barbagallo, A. (School of Civil Engineering, The University of Sydney) ;
  • Wood, G.S. (Cermak Peterka Petersen Pty. Ltd.)
  • Received : 2011.05.16
  • Accepted : 2011.12.10
  • Published : 2012.09.25
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Abstract

Three common medium- rise building forms were physically tested to study their overall wind induced structural response. Emphasis was placed on the torsional response and its correlation with other peak responses. A higher correlation was found between the peak responses than between the general fluctuating parts of the signals. This suggests a common mechanism causing the peak event, and that this mechanism is potentially different to the mechanism causing the general load fluctuations. The measurements show that about 80% of the peak overall torsion occur simultaneously with the peak overall along wind drag for some generic building shapes. However, the peak torsional response occurs simultaneously with only 30%-40% of the peak overall drag for the rectangular model. These results emphasise the importance of load combinations for building design, which are often neglected in the design of medium sized rigid buildings for which the along-wind drag is dominant. Current design wind loading standards from around the world were evaluated against the results to establish their adequacy for building design incorporating wind-induced torsion effects. Although torsion is frequently neglected, for some structural systems it may become more important.

Keywords

References

  1. American Society of Civil Engineers (2010), ASCE Standard, Minimum Design Loads for Buildings and Other Structures. ASCE 7-10, ASCE, New York, USA.
  2. Architectural Institute of Japan (2004), AIJ recommendations for loads on buildings.
  3. Australian Wind Engineering Society (2001), AWES-QAM-1-2001, Wind Engineering Studies of Buildings.
  4. Boggs, D.W., Hosoya, N. and Cochran, L. (2000), "Sources of torsional wind loading on tall buildings-lessons from the wind tunnel", Proceedings of the 2000 Structures Congress & Exposition, Philadelphia, May.
  5. Cheung, J.C.K. and Melbourne, W.H. (2006), "Torsional moments of tall buildings with various planform shapes", Proceedings of the 12th Australasian Wind Engineering Society Workshop, Queenstown, February.
  6. Cheung, J.C.K. and Melbourne, W.H. (1992), "Torsional moments of tall buildings", J. Wind Eng. Ind. Aerod., 41-44, 1125-1126.
  7. International Standards Organisation (2009), Wind Actions on Structures ISO 4354.
  8. Isyumov, N. and Poole, M. (1983), "Wind induced torque on square and rectangular building shapes", J. Wind Eng. Ind. Aerod., 13(1-3), 183-196. https://doi.org/10.1016/0167-6105(83)90140-X
  9. Liang, S., Li, Q.S., Liu, S., Zhang, L. and Gu, M. (2004), "Torsional dynamic wind loads on rectangular tall buildings", Eng. Struct., 26(1), 129-137. https://doi.org/10.1016/j.engstruct.2003.09.004
  10. Lythe, G.R. and Surry, D. (1990), "Wind-induced torsional loads on tall buildings", J. Wind Eng. Ind. Aerod., 36(1), 225-234. https://doi.org/10.1016/0167-6105(90)90307-X
  11. Rofail, A.W. and Kwok, K.C.S. (1992), "A reliability study of wind tunnel results for cladding pressure", J. Wind Eng. Ind. Aerod., 44(1-3), 2413-2424. https://doi.org/10.1016/0167-6105(92)90033-7
  12. Standards Australia (2011), Structural Design Actions Part 2 Wind Actions, AS/NZS 1170.2-2011, Standards Australia.
  13. Tamura, Y., Kikuchi, H. and Hibi, K. (2000), "Wind load combinations and extreme pressure distributions on low-rise buildings", Wind Struct., 3(4), 279-289. https://doi.org/10.12989/was.2000.3.4.279
  14. Tamura, Y., Kikuchi, H. and Hibi, K. (2001), "Extreme wind pressure distributions on low-rise building models", J. Wind Eng. Ind. Aerod., 89(14-15), 1635-1646. https://doi.org/10.1016/S0167-6105(01)00153-2
  15. Tamura, Y., Kikuchi, H. and Hibi, K. (2003), "Quasi-static wind load combinations for low- and middle-rise buildings", J. Wind Eng. Ind. Aerod., 91(12-15), 1613-1625. https://doi.org/10.1016/j.jweia.2003.09.020
  16. Tamura, Y., Kikuchi, H. and Hibi, K. (2007), "Peak normal stresses and effects of wind direction on wind load combinations for medium-rise buildings", J. Wind Eng. Ind. Aerod., 96(6-7), 1043-1057.
  17. Tamura, Y., Kareem, A., Solari, G., Kwok, K.C.S., Holmes, J.D. and Melbourne, W.H. (2005), "Aspects of the dynamic wind-induced response of structures and codification", Wind Struct., 8(4) 251-268. https://doi.org/10.12989/was.2005.8.4.251
  18. Venanzi, I. (2006), "Torsional response of high-rise buildings exposed to turbulent wind", Proceedings of the 7th UK Conference on Wind Engineering, Glasgow, 4-6 September.
  19. Wu, J.R. and Li, Q.S. (2008), "Wind-induced lateral-torsional coupled responses of tall buildings", Wind Struct., 11(2), 153-178. https://doi.org/10.12989/was.2008.11.2.153
  20. Xie, Z.N. and Gu, M. (2005), "A correlation-based analysis on wind-induced interference effects between two tall buildings", Wind Struct., 8(3), 163-178. https://doi.org/10.12989/was.2005.8.3.163

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