Wind and Structures

  • 제10권4호
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  • Pages.347-366
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  • 2007
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Estimating peak wind load effects in guyed masts

  • Sparling, B.F. (Department of Civil Engineering, University of Saskatchewan) ;
  • Wegner, L.D. (Department of Civil Engineering, University of Saskatchewan)
  • 투고 : 2005.08.01
  • 심사 : 2007.07.10
  • 발행 : 2007.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Guyed masts subjected to turbulent winds exhibit complex vibrations featuring many vibration modes, each of which contributes to various structural responses in differing degrees. This dynamic behaviour is further complicated by nonlinear guy cable properties. While previous studies have indicated that conventional frequency domain methods can reliably reproduce load effects within the mast, the system linearization required to perform such an analysis makes it difficult to relate these results directly to corresponding guy forces. As a result, the estimation of peak load effects arising jointly from the structural action of the mast and guys, such as leg loads produced as a result of guy reactions and mast bending moments, is uncertain. A numerical study was therefore undertaken to study peak load effects in a 295 m tall guyed mast acted on by simulated turbulent wind. Responses calculated explicitly from nonlinear time domain finite element analyses were compared with approximate methods in the frequency domain for estimating peak values of selected responses, including guy tension, mast axial loads and mast leg loads. It was found that these peak dynamic load effects could be accurately estimated from frequency domain analysis results by employing simple, slightly conservative assumptions regarding the correlation of related effects.

키워드

참고문헌

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피인용 문헌

  1. Structural assessment of a guyed mast through measurement of natural frequencies vol.59, 2014, https://doi.org/10.1016/j.engstruct.2013.09.049
  2. Fuzzy pattern recognition technique for crack propagation on earplate connection of guyed mast under wind load vol.24, pp.11, 2017, https://doi.org/10.1002/stc.2010
  3. 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
  4. 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
  5. Wind-Induced Response Analysis of Guyed Mast Earplate Considering Welding Residual Stresses vol.143-144, pp.1662-8985, 2010, https://doi.org/10.4028/www.scientific.net/AMR.143-144.95
  6. Assessment of Degrees of Cumulative Fatigue Crack Initiation Damage at Guyed Mast Earplate Joint vol.467-469, pp.1662-9795, 2011, https://doi.org/10.4028/www.scientific.net/KEM.467-469.776
  7. The Impact to the Guyed Mast Welding Earplant Joint's Wind-Induced Cumulative Fatigue Damage by Different Eliminate Proportion of Welding Residual Stress vol.482, pp.1662-7482, 2013, https://doi.org/10.4028/www.scientific.net/AMM.482.85