Wind and Structures

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Influence of a community of buildings on tornadic wind fields

  • Li, Zhi (Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology) ;
  • Honerkamp, Ryan (Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology) ;
  • Yan, Guirong (Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology) ;
  • Feng, Ruoqiang (Structural Engineering Service Dept., Sumitomo Mitsui Construction co., ltd.)
  • Received : 2018.01.10
  • Accepted : 2019.09.17
  • Published : 2020.02.25
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Abstract

To determine tornadic wind loads, the wind pressure, forces and moments induced by tornadoes on civil structures have been studied. However, in most previous studies, only the individual building of interest was included in the wind field, which may be suitable to simulate the case where a tornado strikes rural areas. The statistical data has indicated that tornadoes induce more significant fatalities and property loss when they attack densely populated areas. To simulate this case, all buildings in the community of interest should be included in the wind field. However, this has been rarely studied. To bridge this research gap, this study will systematically investigate the influence of a community of buildings on tornadic wind fields by modeling all buildings in the community into the wind field (designated as "the Community case under tornadic winds"). For comparison, the case in which only a single building is included in the tornadic wind field (designated as "the Single-building case under tornadic winds") and the case where a community of buildings are included in the equivalent straight-line wind field (designated as "the Community case under straight-line winds") are also simulated. The results demonstrate that the presence of a number of buildings completely destroys the pattern of regular circular strips in the distribution of tangential velocity and pressure on horizontal planes. Above the roof height, the maximum tangential velocity is lower in the Community case under tornadic winds than that in the Single-building case under tornadic winds because of the higher surface friction in the Community case; below the roof height, greater tangential velocity and pressure are observed in the Community case under tornadic wind fields, and more unfavorable conditions are observed in the Community case under tornadic winds than under the equivalent straight-line winds.

Keywords

References

  1. Blocken, B., Stathopoulos, T. and van Beeck, J.P.A.J. (2016), "Pedestrian-level wind conditions around buildings: Review of wind-tunnel and CFD techniques and their accuracy for wind comfort assessment", Build. Environ., 100, 50-81. https://doi.org/10.1016/j.buildenv.2016.02.004.
  2. Chang, C.H. and Meroney, R.N. (2003), "The effect of surroundings with different separation distances on surface pressures on low-rise buildings", J. Wind Eng. Ind. Aerod., 91(8), 1039-1050. https://doi.org/10.1016/S0167-6105(03)00051-5.
  3. Dessens Jr, J. (1972), "Influence of ground roughness on tornadoes: A laboratory simulation", J. Appl. Meteorol., 11(1), 72-75. https://doi.org/10.1175/1520-0450(1972)011<0072:IOGROT>2.0.CO;2
  4. Diamond, C.J., and Wilkins, E.M. (1984), "Translation effects on simulated tornadoes", J. Atmos. Sci., 41(17), 2574-2580. https://doi.org/10.1175/1520-0469(1984)041<2574:TEOST>2.0.CO;2
  5. Elshaer, A., Aboshosha, H., Bitsuamlak, G., El Damatty, A. and Dagnew, A. (2016), "LES evaluation of wind-induced responses for an isolated and a surrounded tall building", Eng. Struct., 115, 179-195. https://doi.org/10.1016/j.engstruct.2016.02.026.
  6. Khanduri, A.C., Stathopoulos, T. and Bedard, C. (1998), "Wind-induced interference effects on buildings - a review of the state-of-the-art", Eng. Struct., 20(7), 617-630. https://doi.org/10.1016/S0141-0296(97)00066-7.
  7. Kosiba, K. and Wurman, J. (2010). "The three-dimensional axisymmetric wind field structure of the Spencer, South Dakota, 1998 Tornado", J. Atmos. Sci., 67, 3074-3083. https://doi.org/10.1175/2010JAS3416.1
  8. Kuai, L., Haan Jr, F.L., Gallus Jr, W.A. and Sarkar, P.P. (2008), "CFD simulations of the flow field of a laboratory-simulated tornado for parameter sensitivity studies and comparison with field measurements", Wind Struct., 11(2), 75-96. https://doi.org/10.12989/was.2008.11.2.075
  9. Lam, K.M., Leung, M.Y.H. and Zhao, J.G. (2008), "Interference effects on wind loading of a row of closely spaced tall buildings", J. Wind Eng. Ind. Aerod., 96(5), 562-583. https://doi.org/10.1016/j.jweia.2008.01.010.
  10. Lam, K.M., Zhao, J.G. and Leung, M.Y.H. (2011), "Wind-induced loading and dynamic responses of a row of tall buildings under strong interference", J. Wind Eng. Ind.Aerod., 99(5), 573-583. https://doi.org/10.1016/j.jweia.2011.02.006.
  11. Leslie, F.W. (1977), "Surface roughness effects on suction vortex formation: A laboratory simulation", J. Atmos. Sci., 34(7), 1022-1027. https://doi.org/10.1175/1520-0469(1977)034<1022:SREOSV>2.0.CO;2
  12. Liu, Z. and Ishihara, T. (2012), "Effects of the swirl ratio on turbulent flow fields of tornado-like vortices by using LES turbulent model", The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7), Shanghai, China, September.
  13. Liu, Z. and Ishihara, T. (2015). "Numerical study of turbulent flow fields and the similarity of tornado vortices using large-eddy simulations", J. Wind Eng. Ind.Aerod., 145, 42-60. https://doi.org/10.1016/j.jweia.2015.05.008.
  14. Monji, N. and Wang, Y.K. (1989), "A laboratory investigation of characteristics of tornado-like vortices over various rough surfaces", J. Meteo. Res., 3(4), 506-515.
  15. Natarajan, D. (2011), "Numerical simulation of tornado-like vortices", Ph.D. Dissertation, The University of Western Ontario, Ontario, Canada.
  16. Natarajan, D. and Hangan, H. (2009), "Numerical study on the effects of surface roughness on tornado-like flows", In 11th Americas Conference on Wind Engineering.
  17. Natarajan, D. and Hangan, H. (2012), "Large eddy simulations of translation and surface roughness effects on tornado-like vortices", J. Wind Eng. Ind.Aerod., 104, 577-584. https://doi.org/10.1016/j.jweia.2012.05.004.
  18. Nozawa, K. and Tamura, T. (2002), "Large eddy simulation of the flow around a low-rise building immersed in a rough-wall turbulent boundary layer", J. Wind Eng. Ind.Aerod., 90(10), 1151-1162. https://doi.org/10.1016/S0167-6105(02)00228-3.
  19. Pan, Y. and Xiao, Y. (2013). "CFD numerical simulation of tornado wind field and wind loads on structures ", Master's Thesis, Harbin Institute of Technology, Harbin, China.
  20. Wang, F., Tamura, Y. and Yoshida, A. (2014), "Interference effects of a neighboring building on wind loads on scaffolding", J. Wind Eng. Ind.Aerod., 125, 1-12. https://doi.org/10.1016/j.jweia.2013.11.009.
  21. Wilkins, E.M., Sasaki, Y. and Johnson, H.L. (1975), "Surface friction effects on thermal convection in a rotating fluid: A laboratory simulation", Mon. Weather Rev., 103(4), 305-317. https://doi.org/10.1175/1520-0493(1975)103<0305:SFEOTC>2.0.CO;2
  22. Xie, Z.N. and Gu, M. (2004), "Mean interference effects among tall buildings", Eng. Struct., 26(9), 1173-1183. https://doi.org/10.1016/j.engstruct.2004.03.007.
  23. Yousef, M.A.A., Selvam, P.R. and Prakash, J. (2018). "A comparison of the forces on dome and prism for straight and tornadic wind using CFD model", Wind Struct., 26(6), 369-382. https://doi.org/10.12989/was.2018.26.6.369.
  24. Zhang, W. and Sarkar, P.P. (2008), "Effects of ground roughness on tornado like vortex using PIV", In Proceedings of the AAWE Workshop, U.S.A. August.