DOI QR코드

DOI QR Code

Effective technique to analyze transmission line conductors under high intensity winds

  • Aboshosha, Haitham (Department of Civil and Environmental Engineering, Western University) ;
  • El Damatty, Ashraf (Department of Civil and Environmental Engineering, Western University)
  • 투고 : 2013.07.10
  • 심사 : 2013.10.28
  • 발행 : 2014.03.25

초록

An effective numerical technique to calculate the reactions of a multi-spanned transmission line conductor system, under arbitrary loads varying along the spans, is developed. Such variable loads are generated by High Intensity Wind (HIW) events in the form of tornadoes and downburst. First, a semi-closed form solution is derived to obtain the displacements and the reactions at the ends of each conductor span. The solution accounts for the nonlinearity of the system and the flexibility of the insulators. Second, a numerical scheme to solve the derived closed-form solution is proposed. Two conductor systems are analyzed under loads resulting from HIW events for validation of the proposed technique. Non-linear Finite Element Analyses (FEA) are also conducted for the same two systems. The responses resulting from the technique are shown to be in a very good agreement with those resulting from the FEA, which confirms the technique accuracy. Meanwhile, the semi-closed form technique shows superior efficiency in terms of the required computational time. The saving in computational time has a great advantage in predicting the response of the conductors under HIW events, since this requires a large number of analyses to cover different potential locations and sizes of those localized events.

키워드

참고문헌

  1. Aboshosha, H. and El Damatty, A. (2013), "Downburst induced forces on the conductors of electric transmission lines and the corresponding vulnerability of tower failure", Proceedings of the Canadian Society of Civil Engineers CSCE 2013, Montreal, Quebec, Canada-GEN-164.
  2. Ahmadi-Kashani, K. and Bell, A.J. (1988), "The analysis of cables subject to uniformly distributed loads", Eng. Struct., 10(3), 174-184. https://doi.org/10.1016/0141-0296(88)90004-1
  3. Darwish M., El Damatty A. and Hangan, H. (2010), "Dynamic characteristics of transmission line conductors and behaviour under turbulent downburst loading", Wind Struct., 13(4), 327-346. https://doi.org/10.12989/was.2010.13.4.327
  4. El Damatty, A. and Hamada, A. (2012), "Behaviour of guyed transmission line structures under tornado wind loads - case studies", Proceedings of the ASCE -Structural Engineering Institute - Electrical Transmission and Substation Structures Conference, Columbus, Ohio, USA, November .
  5. El Damatty, A. and Aboshosha, H. (2012), "Capacity of electrical transmission towers under downburst loading", Proceedings of the 1st Australasia and South-East Asia Structural Engineering and Construction Conference, Perth, Australia.
  6. Fujita, T.T. (1990), "Downbursts: meteorological features and wind field characteristics", J. Wind Eng. Ind. Aerod., 36(1), 75-86. https://doi.org/10.1016/0167-6105(90)90294-M
  7. Hangan, H. and Kim, J. (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
  8. Hangan, H. and Kim, J. (2008), "Swirl ratio effects on tornado vortices in relation to the Fujita scale", Wind Struct., 11(4), 291-302. https://doi.org/10.12989/was.2008.11.4.291
  9. Hamada, A. and El Damatty, A.A. (2011), "Behaviour of guyed transmission line structures under tornado wind loading", Comput. Struct., 89(11-12), 986-1003. https://doi.org/10.1016/j.compstruc.2011.01.015
  10. Irvine, H.M. (1981), Cable structures, MIT Press, Cambridge.
  11. 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
  12. Li, C.Q. (2000), "A stochastic model of severe thunderstorms for transmission line design", Probabilist. Eng. Mech., 15, 359-364. https://doi.org/10.1016/S0266-8920(99)00037-5
  13. Manitoba Hydro Transmission and Civil Design Department (1999), "Bipole 1 & 2 HVDC transmission line wind storm failure on September 5, 1996 review of emergency response, restoration and design of these lines", Manitoba Hydro, 98-L1/1-37010-06000, 54.
  14. Savory, E., Parke, G.A.R., Zeinoddini, M., Toy, N. and Disney, P. (2001), "Modeling 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
  15. 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
  16. 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
  17. Shehata, A.Y. and El Damatty, A.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
  18. Wei, P., Bingnan, S. and Jinchun T. (1999), "A catenary element for the analysis of cable structures", Appl. Math. Mech. Eng., 20(5), 0253-4827
  19. Winkelman, P.F. (1959), "Sag-tension computations and field measurements of Bonneville power administration", AIEE Paper, 59-900
  20. Yu, P., Wong, P. and Kaempffer, F. (1995), "Tension of conductor under concentrated loads", J. Appl. Mech. - T. ASME, 62(3), 802-809. https://doi.org/10.1115/1.2897017

피인용 문헌

  1. Characteristics of Rainfall in Wind Field of a Downburst and Its Effects on Motion of High-Voltage Transmission Line vol.2017, 2017, https://doi.org/10.1155/2017/7350369
  2. Dynamic response of transmission line conductors under downburst and synoptic winds vol.21, pp.2, 2015, https://doi.org/10.12989/was.2015.21.2.241
  3. Engineering method for estimating the reactions of transmission line conductors under downburst winds vol.99, 2015, https://doi.org/10.1016/j.engstruct.2015.04.010
  4. Longitudinal force on transmission towers due to non-symmetric downburst conductor loads vol.127, 2016, https://doi.org/10.1016/j.engstruct.2016.08.030
  5. Critical load cases for lattice transmission line structures subjected to downbursts: Economic implications for design of transmission lines vol.159, 2018, https://doi.org/10.1016/j.engstruct.2017.12.043
  6. Finite element modelling of pre-stressed concrete poles under downbursts and tornadoes vol.153, 2017, https://doi.org/10.1016/j.engstruct.2017.10.047
  7. Analysis of buffeting response of hinged overhead transmission conductor to nonstationary winds vol.147, 2017, https://doi.org/10.1016/j.engstruct.2017.06.009
  8. Review on dynamic and quasi-static buffeting response of transmission lines under synoptic and non-synoptic winds vol.112, 2016, https://doi.org/10.1016/j.engstruct.2016.01.003
  9. Aero-elastic response of transmission line system subjected to downburst wind: Validation of numerical model using experimental data vol.27, pp.2, 2014, https://doi.org/10.12989/was.2018.27.2.071
  10. The Dynamic Effect of Downburst Winds on the Longitudinal Forces Applied to Transmission Towers vol.5, pp.None, 2014, https://doi.org/10.3389/fbuil.2019.00059
  11. Evaluation of Peak Transmission Line Conductor Reactions Under Downburst Winds Using Optimization and Simplified Approaches vol.5, pp.None, 2014, https://doi.org/10.3389/fbuil.2019.00088
  12. Behaviour and design of guyed pre-stressed concrete poles under downbursts vol.29, pp.5, 2014, https://doi.org/10.12989/was.2019.29.5.339
  13. Nonlinear Dynamic Analysis of Transmission Line Cables under Synoptic Wind Loads vol.25, pp.4, 2020, https://doi.org/10.1061/(asce)sc.1943-5576.0000514
  14. Progressive collapse analysis of a truss transmission tower-line system subjected to downburst loading vol.188, pp.None, 2022, https://doi.org/10.1016/j.jcsr.2021.107044