Wind and Structures

  • 제26권6호
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  • Pages.369-382
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  • 2018
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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A comparison of the forces on dome and prism for straight and tornadic wind using CFD model

  • Yousef, Majdi A.A. (Department of Civil Engineering, University of Arkansas) ;
  • Selvam, Panneer R. (Department of Civil Engineering, University of Arkansas) ;
  • Prakash, Jai (Department of Mathematics, University of Botswana)
  • 투고 : 2016.12.04
  • 심사 : 2018.03.06
  • 발행 : 2018.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Tornadoes are vertical swirling air formed because of the existence of layers of air with contrasting features of temperature, wind flow, moisture, and density. Tornadoes induce completely different wind forces than a straight-line (SL) wind. A suitably designed building for an SL wind may fail when exposed to a tornado-wind of the same wind speed. It is necessary to design buildings that are more resistant to tornadoes. In tornado-damaged areas, dome buildings seem to have less damage. As a dome structure is naturally wind resistant, domes have been used in back yards, as single family homes, as in-law quarters, man caves, game rooms, storm shelters, etc. However, little attention has been paid to the tornadic wind interactions with dome buildings. In this work, the tornado forces on a dome are computed using Computational Fluid Dynamics (CFD) for tornadic and SL wind. Then, the interaction of a tornado with a dome and a prism building are compared and analyzed. This work describes the results of the tornado wind effect on dome and prism buildings. The conclusions drawn from this study are illustrated in visualizations. The tornado force coefficients on a dome building are larger than SL wind forces, about 120% more in x- and y-directions and 280% more in z-direction. The tornado maximum pressure coefficients are also higher than SL wind by 150%. The tornado force coefficients on the prism are larger than the forces on the dome, about 100% more in x- and y-directions, and about 180% more in z-direction. The tornado maximum pressure coefficients on prism also are greater those on dome by 150% more. Hence, a dome building has less tornadic load than a prism because of its aerodynamic shape.

키워드

과제정보

연구 과제 주관 기관 : University of Arkansas

참고문헌

  1. Ahmed, S.N. and Selvam, R.P. (2015), "Ridge effects on tornado path deviation", Int. J. Civil aStruct. Eng., 3 (1), 273-294.
  2. Alrasheedi, N.H. and Selvam, R.P. (2011), "Computing tornado forces on different building sizes", Proceedings of the International Conference on Wind Engineering (ICWE13), Amsterdam, Netherlands.
  3. Church, C., Burgess, D., Doswell, C. and Davies-Jones, R. (1993), "Tornado vortex theory, in: the tornado: its structure, dynamics, prediction, and hazards", Geophys. Mono., American Geophys. Union., 79, 19-39.
  4. de Sampio, P.A.B, Lyra, P.R.M., Morgan, K. and Weatherill, N.P. (1993), "Petro-Galerkin solutions of the incompressible Navier-Stokes equations in primitive variables with adaptive remeshing", Comput. Method. Appl. M., 106, 143-178 https://doi.org/10.1016/0045-7825(93)90189-5
  5. Filippone, A. and Afgan, I. (2008), "Orthogonal blade-vortex interaction on a helicopter tail rotor", AIAA J., 46 (6), 1476-1489. https://doi.org/10.2514/1.32690
  6. Gorecki, M.P. and Selvam, R.P. (2015), "Rankine combined vortex interaction with a rectangular prism", Int. J. Comput. Fluid. D., 29 (1), 120-132. https://doi.org/10.1080/10618562.2015.1010524
  7. Gorecki, M.P. and Selvam, R.P. (2014), "Visualization of tornadolike vortex interacting with wide tornado-break wall", J. Visualize., 18 (2), 393-406.
  8. Haan, F.L., Balaramudu, V.K. and Sarkar, P.P. (2010), "Tornado-induced wind loads on a low-rise building", J. Struct. Eng. - ASCE, 136(1), 106-116. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000093
  9. Hu, H., Yang, Z., Sarkar, P. and Haan, F. (2011), "Characterization of the wind loads and flow fields around a gable roof building model in tornado-like winds", Exp. Fluids, 51(3), 835-851. https://doi.org/10.1007/s00348-011-1102-6
  10. Ishihara, T., Oh, S. and Tokuyama, Y. (2011), "Numerical study on flow fields of tornado-like vortices using the LES turbulence model", J. Wind Eng. Ind. Aerod., 99(4), 239-248. https://doi.org/10.1016/j.jweia.2011.01.014
  11. Kosiba, K.A., Robinson, P., Chan, P.W. and Wurman, J. (2014), "Wind field of a non-mesocyclone anticyclonic tornado crossing the Hong Kong International Airport". Adv. Meterorol., 2014, 1-7.
  12. Liu, X. and Marshall, J.S. (2004), "Blade penetration into a vortex core with and without axial core flow", J. Fluid Mech., 519, 81-103. https://doi.org/10.1017/S0022112004001302
  13. Monolithic (2013), Testimonials/domers-respond-to-Moore-Oklahoma; Monolithic Dome Institute, Texas, USA, http://www.monolithic.org/testimonials/domers-respond-tomoore-oklahoma
  14. Monolithic (2013), Monolithic dome school; Monolithic Dome Institute, Texas, USA, http://www.monolithic.org/schools
  15. Murakami, S. and Mochida, A. (1995), "On turbulent vortexshedding flow past 2D square cylinder predicted by CFD", J. Wind Eng. Ind. Aerod., 54-55, 191-211. https://doi.org/10.1016/0167-6105(94)00043-D
  16. New Age Dome Construction (2017), Tornado Shelters/Domes in Disasters; New Age Dome Construction, Buncaville, USA, http://newagedomeconstruction.com/services/tornado-shelters/.
  17. NWS (2011), National Weather Service Weather Forecast Office; Tuscaloosa-Birmingham Tornado, USA, http://www.srh.noaa.gov/bmx/?n=event_04272011tuscbirm.
  18. NWS (2017), Tuscaloosa-Birmingham Tornado; National Weather Service, Birmingham, USA http://www.srh.noaa.gov/bmx/?n=event_04272011tuscbirm.
  19. Rajasekharan, S.G., Matsui, M. and Tamura, Y. (2013), "Characteristics of internal pressures and net local roof wind forces on a building exposed to a tornado-like vortex", J. Wind Eng. Ind. Aerod., 112, 52-57. https://doi.org/10.1016/j.jweia.2012.11.005
  20. Sabareesh, G.R., Matsui, M. and Tamura, Y., (2013), "Ground roughness effects on internal pressure characteristics for buildings exposed to tornado-like flow", J. Wind Eng. Ind. Aerod., 122, 113-117. https://doi.org/10.1016/j.jweia.2013.07.010
  21. Strasser, M.N. and Selvam, R.P. (2015), "The variation in the maximum loading of a circular cylinder impacted by a 2D vortex with time of impact", J. Fluid. Struct., 58, 66-78. https://doi.org/10.1016/j.jfluidstructs.2015.07.005
  22. Selvam, R.P. (1985), "Applications of the boundary element method for tornado forces on buildings", Ph.D. dissertation, Texas Tech University, Lubbock.
  23. Selvam, R.P. (1993), "Computer modeling of tornado forces on buildings", Proceedings of the 7th US National Conference on Wind Engineering, Gary C. Hart, Los Angeles, June.
  24. Selvam, R. P. (1997), "Finite element modelling of flow around a circular cylinder using LES", J. Wind Eng Ind. Aerod., 67-68, 129-139. https://doi.org/10.1016/S0167-6105(97)00068-8
  25. Selvam, R.P. (1998), "Computational procedures in grid based computational bridge aerodynamics", In Bridge Aerodynamics, (Eds., Larsen, A. and Esdahl), Balkema, Rotterdam.
  26. Selvam, R.P. and Gorecki, P. (2012), "Effect of tornado size on forces on thin 2D cylinder", 3rd American Association for Wind Engineering Workshop, Hyannis, Massachusetts, USA.
  27. Selvam, R.P. and Paterson, D.A., (1993), "Computation of Conductor Drag Coefficients", J. Wind Eng Ind. Aerod., 50, 1-8. https://doi.org/10.1016/0167-6105(93)90055-S
  28. Selvam, R.P. and Millett, P. (2003), "Computer modeling of tornado forces on buildings", Wind Struct., 6(1), 209-220. https://doi.org/10.12989/was.2003.6.3.209
  29. Selvam, R.P. and Millett, P. (2005), "Large eddy simulation of the tornado-structure interaction to determine structural loadings". Wind Struct., 8 (1), 49-60. https://doi.org/10.12989/was.2005.8.1.049
  30. Selvam, R.P., Roy, U.K., Jung, Y. and Mehta, K.C. (2002), "Investigation of tornado forces on a 2D cylinder using computer modeling", In Wind Engineering, by K. Kumar (Ed), Phoenix Publishing House, New Delhi, India.
  31. Sengupta, A., Haan, F.L., Sarkar, P.P. and Balaramudu, V. (2008), "Investigation of tornado transient loads on buildings in microburst and tornado wind", J. Wind Eng Ind. Aerod., 96(10-11), 2173-2187. https://doi.org/10.1016/j.jweia.2008.02.050
  32. Tamura, T. (1999), "Reliability on CFD estimation for windstructure interaction problems", J. Wind Eng. Ind. Aerod., 81(1), 117-143. https://doi.org/10.1016/S0167-6105(99)00012-4
  33. Tamura, T., Itoh, Y., Wada, A. and Kuwahara, K. (1995), "Numerical study of pressure fluctuations on a rectangular cylinder in aerodynamic oscillation", J. Wind Eng Ind. Aerod., 54, 239-250.
  34. Wen, Y. (1975), "Dynamic tornadic wind loads on tall buildings", J. Struct. Div., 101 (1), 169-185.
  35. Wurman, J., Kosiba, K. and Robinson, P. (2013), "In situ, Doppler radar, and video observations of the interior structure of a tornado and the wind-damage relationship", Bull. Am. Meteorol. Soc., 94(6), 835-846. https://doi.org/10.1175/BAMS-D-12-00114.1
  36. Wurman, J., Robinson, P., Alexander, C. and Richardson, Y. (2007), "Low-Level Winds In Tornadoes And Potential Catastrophic Tornado Impacts In Urban Areas", Bull. Am. Meteorol. Soc., 88(1), 31-46. https://doi.org/10.1175/BAMS-88-1-31
  37. Yang, Z., Sarkar P.P. and Hu, H. (2010), "Visualization of flow structures around gable-roofed building model in tornado-like winds", J. Visualize., 13, 285-288. https://doi.org/10.1007/s12650-010-0052-z
  38. Yousef, M.A. and Selvam, R.P. (2016), "Effect of equivalent height, surface area and Volume of the dome to prism on tornado forces using CFD", Proceedings of the 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), Boston, Massachusetts, June.
  39. Zhao, Y., Yan, G., Zu, J., Yuan, F., Kakkattukuzhy, M. and Isaac, K. (2016), "Comparison on wind effects of tornadic and straight-line wind fields on spherical dome structures", Proceedings of the 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII)", Boston, Massachusetts, June.