Wind and Structures

  • 제1권2호
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  • Pages.183-199
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  • 1998
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Field measurements of wind-induced transmission tower foundation loads

  • Savory, E. (Department of Civil Engineering, University of Surrey) ;
  • Parke, G.A.R. (Department of Civil Engineering, University of Surrey) ;
  • Disney, P. (Department of Civil Engineering, University of Surrey) ;
  • Toy, N. (Department of Civil Engineering, University of Surrey) ;
  • Zeinoddini, M. (Department of Civil Engineering, University of Surrey)
  • 발행 : 1998.06.25
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초록

This paper discusses some of the findings arising from long-term monitoring of the wind effects on a transmission tower located on an exposed site in South-West England. Site wind speeds have been measured, together with the foundation loads at the base of each of the four legs. The results show good correlation between the wind speeds and leg strains (loads) for a given wind direction, as expected, for wind speeds in excess of 10 m/s. Comparisons between the measured strains and those determined from the UK Code of Practice for lattice towers (BS8100), for the same wind speed and direction, show that the Code over-estimates most of the measured foundation loads by a moderate amount of about 14% at the higher wind speeds. This tends to confirm the validity of the Code for assessing design foundation loads. A finite element analysis model has been used to examine the dynamic behaviour of the tower and conductor system. This shows that, in the absence of the conductor, the tower alone has similar natural frequencies of approximately 2.2 Hz in the both the first (transversal) and second (longitudinal) modes, whilst for the complete system and conductor oscillations dominate, giving similar frequencies of approximately 0.1 Hz for both the first and second modes.

키워드

참고문헌

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피인용 문헌

  1. Wind-induced transmission tower foundation loads: A field study-design code comparison vol.96, pp.6-7, 2008, https://doi.org/10.1016/j.jweia.2007.06.033
  2. Dynamic Responses and Vibration Control of the Transmission Tower-Line System: A State-of-the-Art Review vol.2014, 2014, https://doi.org/10.1155/2014/538457
  3. Wind-induced vibration of UHV transmission tower line system: Wind tunnel test on aero-elastic model vol.171, 2017, https://doi.org/10.1016/j.jweia.2017.10.011
  4. Modelling of tornado and microburst-induced wind loading and failure of a lattice transmission tower vol.23, pp.4, 2001, https://doi.org/10.1016/S0141-0296(00)00045-6
  5. Wind Risk Assessment of Electric Power Lines due to Hurricane Hazard vol.21, pp.2, 2020, https://doi.org/10.1061/(asce)nh.1527-6996.0000363
  6. Stability behavior of the transmission line system under incremental dynamic wind load vol.31, pp.6, 1998, https://doi.org/10.12989/was.2020.31.6.509