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Aero-elastic response of transmission line system subjected to downburst wind: Validation of numerical model using experimental data

  • Elawady, Amal (Department of Civil and Environmental Engineering, Florida International University) ;
  • Aboshosha, Haitham (Department of Civil Engineering, Ryerson University) ;
  • El Damatty, Ashraf (Department of Civil and Environmental Engineering, Western University)
  • Received : 2018.03.02
  • Accepted : 2018.06.27
  • Published : 2018.08.25

Abstract

At the University of Western Ontario (UWO), numerical tools represented in semi-closed form solution for the conductors and finite element modeling of the lattice tower were developed and utilized significantly to assess the behavior of transmission lines under downburst wind fields. Although these tools were validated against other finite element analyses, it is essential to validate the findings of those tools using experimental data. This paper reports the first aeroelastic test for a multi-span transmission line under simulated downburst. The test has been conducted at the three-dimensional wind testing facility, the WindEEE dome, located at the UWO. The experiment considers various downburst locations with respect to the transmission line system. Responses obtained from the experiment are analyzed in the current study to identify the critical downburst locations causing maximum internal forces in the structure (i.e., potential failure modes), which are compared with the failure modes obtained from the numerical tools. In addition, a quantitative comparison between the measured critical responses obtained from the experiment with critical responses obtained from the numerical tools is also conducted. The study shows a very good agreement between the critical configurations of the downburst obtained from the experiment compared to those predicted previously by different numerical studies. In addition, the structural responses obtained from the experiment and those obtained from the numerical tools are in a good agreement where a maximum difference of 16% is found for the mean responses and 25% for the peak responses.

Keywords

References

  1. Abd-Elaal, E., Mills, J.E. and Ma, X. (2013), "An analytical model for simulating steady state flows of downburst", J Wind Eng Ind Aerod., 115, 53-64. https://doi.org/10.1016/j.jweia.2013.01.005
  2. Aboshosha, H. and El Damatty, A.A. (2014), "Effective numerical technique to analyse transmission line conductors under high intensity winds", Wind Struct., 18(3), 235-252. https://doi.org/10.12989/was.2014.18.3.235
  3. Aboshosha, H. and El Damatty, A.A. (2015a), "Dynamic response of transmission line conductors under downburst and synoptic winds", Wind Struct., 21(2), 241-272. https://doi.org/10.12989/was.2015.21.2.241
  4. Aboshosha, H. and El Damatty, A. (2015b), "Engineering method for estimating the reactions of transmission line conductors under downburst winds", Eng. Struct., 99, 272-284. https://doi.org/10.1016/j.engstruct.2015.04.010
  5. Aboshosha., H., Bitsuamlak, G. and El Damatty, A. (2015a), "Turbulence characterization of downbursts using LES", J. Wind Eng. Ind. Aerod., 136, 44-61. https://doi.org/10.1016/j.jweia.2014.10.020
  6. American Society of Civil Engineers (ASCE) (2010), "Guidelines for electrical transmission line structural loading", ASCE manuals and reports on engineering practice, No. 74, New York, NY, USA.
  7. Australian Wind Alliance (2016), http://www.windalliance.org.au/
  8. Chay, M., Albermani, F. and Wilson, R. (2006), "Numerical and analytical simulation of downburst wind loads", Eng. Struct., 28(2), 240-254. https://doi.org/10.1016/j.engstruct.2005.07.007
  9. Chay, M. and Letchford, C. (2002), "Pressure distributions on a cube in a simulated thunderstorm downburst - part a: stationary downburst observations", J. Wind Eng. Ind. Aerod., 90, 711-732. https://doi.org/10.1016/S0167-6105(02)00158-7
  10. Choi, E. and Hidayat, F. (2002), "Dynamic response of structures to thunderstorm winds", Prog. Struct Eng. Mech., 4, 408-416. https://doi.org/10.1002/pse.132
  11. Darwish, M. and El Damatty, A. (2011), "Behavior of selfsupported transmission line towers under stationary downburst loading", Wind Struct., 14(5), 481-484. https://doi.org/10.12989/was.2011.14.5.481
  12. Didden, N. and Ho, C.M. (1985), "Unsteady separation in a boundary layer produced by an impinging jet", J. Fluid Mech., 160, 235-256. https://doi.org/10.1017/S0022112085003469
  13. Donaldson, C. and Snedeker, R. (1971), "A study of free jet impingement, Part 1. Mean properties of free and impinging jets", J. Fluid Mech., 45, 281-319. https://doi.org/10.1017/S0022112071000053
  14. Elawady, A., Aboshosha, H., El Damatty, A., Bitsumlak, G., Hangan, H. and Elatar, A. (2017), "Aeroelastic testing of Multispanned transmission line subjected to downbursts", J. Wind Eng. Ind. Aerod., 169, 194-216. doi.org/10.1016/j.jweia.2017.07.010
  15. Failure Investigation Report, HYDRO ONE NETWORKS INC (2006), "Failure of towers 610 and 611, circuit X503E - 500 kV guyed towers near the Township of Waubaushene", Ontario, August 2, 2006", Line Engineering.
  16. Fujita, T. (1985), "The downburst: microburst and macroburst", SMRP Research Paper 210, University of Chicago, USA.
  17. Fujita, T. (1990), "Downbursts: meteorological features and wind field characteristics", J. Wind Eng. Ind. Aerod., 36, 75-86. https://doi.org/10.1016/0167-6105(90)90294-M
  18. Gant, S. (2009), "Reliability issues of LES-related approaches in an industrial context", Flow. Turbul. Combust., 84, 325-335.
  19. Gerges, R. and El-Damatty, A. (2002), "Large displacement analysis of curved beams", Proceedings of the Canadian Society of Civil Engineering Conference, Montreal, Canada, ST 100.
  20. Hangan, H., Roberts, D., Xu, Z. and Kim, J. (2003), "Downburst simulation. Experimental and numerical challenges", Proceedings of the 11th International Conference on Wind Engineering, Lubbock, TX, USA.
  21. Hjelmfelt, M. (1988), "Structure and life cycle of microburst outflows observed in Colorado", J. Appl. Meteorol., 27, 900-927. https://doi.org/10.1175/1520-0450(1988)027<0900:SALCOM>2.0.CO;2
  22. Holmes, J. (2008), "Recent developments in the specification of wind loads on transmission lines", J. Wind Eng. Ind. Aerod., 8-18.
  23. Holmes, J., Hangan, H., Schroeder, J., Letchford, C. and Orwig, K. (2008), "A forensic study of the Lubbock-Reese downdraft of 2002", Wind Struct., 11(2), 137-152. https://doi.org/10.12989/was.2008.11.2.137
  24. Ivan, M. (1986), "A ring-vortex downburst model for flight simulations", J. Aircraft, 23, 232-236. https://doi.org/10.2514/3.45294
  25. Kanak, J., Benko, M., Simon, A. and Sokol, A. (2007), "Case study of the 9 May 2003 windstorm in southwestern Slovakia", Atmosp. Res., 83, 162-175. https://doi.org/10.1016/j.atmosres.2005.09.012
  26. Kim, J. and Hangan, H. (2007), "Numerical simulations of impinging jets with application to downbursts", J. Wind Eng. Ind. Aerod., 95(4), 279-298. https://doi.org/10.1016/j.jweia.2006.07.002
  27. Koziey, B. and Mirza, F. (1994), "Consistent curved beam element", Comput. Struct., 51(6), 643-654. https://doi.org/10.1016/S0045-7949(05)80003-3
  28. Kwon, D. and Kareem, A. (2009), "Gust-front factor: new framework for wind load effects on structures", J. Struct. Eng. -ASCE, 135(6), 717-732. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:6(717)
  29. Mara, T. and Hong H. (2013), "Effect of wind direction on the response and capacity surface of a transmission tower", Eng. Struct., 57, 493-501. https://doi.org/10.1016/j.engstruct.2013.10.004
  30. Mason, M., Wood, G. and Fletcher, D. (2010), "Numerical investigation of the influence of topography on simulated downburst wind fields", J. Wind Eng. Ind. Aerod., 98(1), 21-33. https://doi.org/10.1016/j.jweia.2009.08.011
  31. Mason, M., Wood, G. and Fletcher, D. (2009), "Numerical simulation of downburst winds", J. Wind Eng. Ind. Aerod., 97(11-12), 523-539. https://doi.org/10.1016/j.jweia.2009.07.010
  32. McCarthy, P. and Melsness, M. (1996), "Severe weather elements associated with September 5, 1996 hydro tower failures near Grosse".
  33. Oseguera, R. and Bowles, R. (1988), "A simple, analytics 3-dimensional downburst model based on boundary layer stagnation flow" NASATM- 100632. Hampton (VA): NASA Langley Research Center.
  34. Savory, E., Parke, G., Zeinoddini, M., Toy, N. and Disney, P. (2001), "Modelling of tornado and microburst-induced wind loading and failure of a lattice transmission tower", Eng. Struct., 23(4), 365-375. https://doi.org/10.1016/S0141-0296(00)00045-6
  35. Sengupta, A. and Sarkar, P. (2008), "Experimental measurement and numerical simulation of an impinging jet with application to thunderstorm microburst winds", J. Wind Eng. Ind. Aerod., 96, 345-365. https://doi.org/10.1016/j.jweia.2007.09.001
  36. Shehata, A. and El Damatty, A. (2008), "Failure analysis of a transmission tower during a microburst", Wind Struct., 11(3), 193-208. https://doi.org/10.12989/was.2008.11.3.193
  37. Shehata, A.Y. and El Damatty, A.A. (2007), "Behaviour of guyed transmission line structures under downburst wind loading", Wind Struct., 10(3), 249-268. https://doi.org/10.12989/was.2007.10.3.249
  38. Shehata, A.Y., El Damatty, A.A. and Savory, E. (2005), "Finite element modeling of transmission line under downburst wind loading", Finite Elem. Anal. Des.., 42(1), 71-89. https://doi.org/10.1016/j.finel.2005.05.005
  39. Solari, G, Burlando, M, De Gaetano, P. and Repetto, M.P. (2015), "Characteristics of thunderstorms relevant to the wind loading of structures", Wind Struct., 20(6), 763-791. https://doi.org/10.12989/was.2015.20.6.763
  40. Vermeire, B., Orf, L. and Savory, E. (2011a), "Improved modelling of downburst outflows for wind engineering applications using a cooling source approach", J. Wind Eng. Ind. Aerod., 99, 801-814. https://doi.org/10.1016/j.jweia.2011.03.003
  41. Wang, X., Lou, W., Li, H. and Chen, Y. (2009), "Wind-induced dynamic response of high-rise transmission tower under downburst wind load", J. Zhejiang Univ., 43(8), 1520-1525.
  42. Wood, G., Kwok, K., Motteram, N. and Fletcher, D. (2001), "Physical and numerical modelling of thunderstorm downbursts", J. Wind Eng. Ind. Aerod., 89, 535-552. https://doi.org/10.1016/S0167-6105(00)00090-8
  43. Yang, F.G. and Zhang, H.G. (2016), "Two case studies on structural analysis of transmission towers under downburst", 22(6), 685-701. https://doi.org/10.12989/was.2016.22.6.685
  44. Zhang, Y. (2006), "Status quo of wind hazard prevention for transmission lines and counter measures", East China Electric Power, 34(3), 28-31.

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