Wind and Structures

  • 제10권3호
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  • Pages.249-268
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  • 2007
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Behaviour of guyed transmission line structures under downburst wind loading

  • Shehata, A.Y. (Atomic Energy of Canada Limited Mississauga) ;
  • El Damatty, A.A. (Department of Civil and Environmental Engineering, The University of Western Ontario)
  • 투고 : 2006.09.16
  • 심사 : 2007.03.26
  • 발행 : 2007.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Past experience indicates that the majority of failures of electrical transmission tower structures occurred during high intensity wind events, such as downbursts. The wind load distribution associated with these localized events is different than the boundary layer wind profile that is typically used in the design of structures. To the best of the authors' knowledge, this study represents the first comprehensive investigation that assesses the effect of varying the downburst parameters on the structural performance of a transmission line structure. The study focuses on a guyed tower structure and is conducted numerically using, as a case study, one of the towers that failed in Manitoba, Canada, during a downburst event in 1996. The study provides an insight about the spatial and time variation of the downburst wind field. It also assesses the variation of the tower members' internal forces with the downburst parameters. Finally, the structural behaviour of the tower under critical downburst configurations is described and is compared to that resulting from the boundary layer normal wind load conditions.

키워드

참고문헌

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피인용 문헌

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  24. Dynamic characteristics of transmission line conductors and behaviour under turbulent downburst loading vol.13, pp.4, 2010, https://doi.org/10.12989/was.2010.13.4.327
  25. Assessment of vertical wind loads on lattice framework with application to thunderstorm winds vol.13, pp.5, 2007, https://doi.org/10.12989/was.2010.13.5.413
  26. Finite element modelling of transmission line structures under tornado wind loading vol.13, pp.5, 2007, https://doi.org/10.12989/was.2010.13.5.451
  27. Behavior of self supported transmission line towers under stationary downburst loading vol.14, pp.5, 2007, https://doi.org/10.12989/was.2011.14.5.481
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  29. The Dynamic Effect of Downburst Winds on the Longitudinal Forces Applied to Transmission Towers vol.5, pp.None, 2007, https://doi.org/10.3389/fbuil.2019.00059
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  33. Reliability-Based Assessment and Cost Analysis of Power Distribution Systems at Risk of Tornado Hazard vol.6, pp.2, 2007, https://doi.org/10.1061/ajrua6.0001055
  34. Towards performance-based design under thunderstorm winds: a new method for wind speed evaluation using historical records and Monte Carlo simulations vol.31, pp.2, 2020, https://doi.org/10.12989/was.2020.31.2.085
  35. Aerodynamic coefficients and pressure distribution on two circular cylinders with free end immersed in experimentally produced downburst-like outflows vol.24, pp.3, 2007, https://doi.org/10.1177/1369433220958763
  36. Parametric study of the quasi-static response of wind turbines in downburst conditions using a numerical model vol.250, pp.None, 2007, https://doi.org/10.1016/j.engstruct.2021.113440