Structural Engineering and Mechanics

  • 제6권7호
  • /
  • Pages.773-784
  • /
  • 1998
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Risk assessment of transmission line structures under severe thunderstorms

  • Li, C.Q. (Department of Civil Engineering, Monash University)
  • 발행 : 1998.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

To assess the collapse risk of transmission line structures subject to natural hazards, it is important to identify what hazard may cause the structural collapse. In Australia and many other countries, a large proportion of failures of transmission line structures are caused by severe thunderstorms. Because the wind loads generated by thunderstorms are not only random but time-variant as well, a time-dependent structural reliability approach for the risk assessment of transmission line structures is essential. However, a lack of appropriate stochastic models for thunderstorm winds usually makes this kind of analysis impossible. The intention of the paper is to propose a stochastic model that could realistically and accurately simulate wind loading due to severe thunderstorms. With the proposed thunderstorm model, the collapse risk of transmission line structures under severe thunderstorms is assessed numerically based on the computed failure probability of the structure.

키워드

참고문헌

  1. Australian Bureau of Meteorology (1992), "Severe wind in New South Wales", Internal Report, pp 64.
  2. Cornell, C.A. (1969), "Bounds on the reliability of structural systems", J. Struct. Div., ASCE, 93(ST1), 171-200.
  3. Fujita, T.T. (1985), The Downburst, Report of Projects NIMROD and JAWS, University of Chicago.
  4. Haldar, A.K. (1986), "Structural reliability analysis of a transmission tower using probabilistic finite element method", Proc. First Int. Symposium on Transmission Lines, 11-13 July, Toronto, 41-50.
  5. Golden, J.H. and Snow, J.T. (1991), "Mitigation against extreme windstorms", Review of Geophysics, 29(4), 477-504. https://doi.org/10.1029/91RG01814
  6. Gomes, L. and Vickery, B.J. (1976), "On thunderstorm wind gusts in Australia", Civil Engrg. Trans., CE16(1), 33-39.
  7. Hawes, H. and Dempsey, D. (1993), "Review of recent Australian transmission line failures due to high intensity winds", Report to Task Force of High Intensity Winds on Transmission Lines, Buenos Aires, April, 19-23.
  8. Holmes, J.D. (1993), "A review of the design of transmission line structures for wind loads", CSIRO Research Report No. 93-75(M), Australia.
  9. Li, C.Q. and Melchers, R.E. (1992), "Reliability analysis of creep and shrinkage effects", J. Struct. Engrg., ASCE, 118(9), 2323-2337. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:9(2323)
  10. Li, C.Q. and Melchers, R.E. (1994), "Computation of time-dependent structural system reliability, Proc. Aust. Struct. Engrg. Conf., 21-23 Sept., Sydney, 1113-1118.
  11. Li, C.Q. and Holmes, J.D. (1994), "Probabilistic model of severe thunderstorms for tansmission line", Proc. 4th AWES Workshop on Wind Engrg, 6-7 Oct., Sydney, 63-66.
  12. Melchers, R.E. (1987), Structural Reliability Analysis and Prediction, John Wiley and Sons, Chichester, U.K..
  13. Milford, R.V. and Goliger, A.M. (1995), "Tornado risk model for transmission line design", 9th International Conference on Wind Engineering, New Delhi, 9-13 January.
  14. Simiu, E. and Scanlan, R.H. (1978), Wind Effects on Structures: An Introduction to Wind Engineering, John Wiley and Sons, New York.
  15. Standards Association of Australia (SAA) (1989), AS 1170.2: Loading Code, Part 2: Wind Loads, North Sydney, Australia.

피인용 문헌

  1. 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