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Typhoon damage analysis of transmission towers in mountainous regions of Kyushu, Japan

  • 투고 : 2003.11.24
  • 심사 : 2004.06.24
  • 발행 : 2004.10.25

초록

In the 1990s, four strong typhoons hit the Kyushu area of Japan and inflicted severe damage on power transmission facilities, houses, and so on. Maximum gust speeds exceeding 60 m/s were recorded in central Kyushu. Although the wind speeds were very high, the gust factors were over 2.0. No meteorological stations are located in mountainous areas, creating a deficiency of meteorological station data in the area where the towers were damaged. Since 1995 the authors have operated a network for wind measurement, NeWMeK, that measures wind speed and direction, covering these mountainous areas, segmenting the Kyushu area into high density arrays. Maximum gusts exceeding 70 m/s were measured at several NeWMeK sites when Typhoon Bart (1999) approached. The gust factors varied widely in southerly winds. The mean wind speeds increased due to effects of the local terrain, thus further increasing gust speeds.

키워드

참고문헌

  1. JEC-127-1979 (1979), Design Standards on Structures for Transmissions, Standard of the Japanese Electrotechnical Committee.
  2. Maeda, J., Tomonobu, N., Miyazaki, F. and Fukumoto, Y. (1994), "Wind observation analysis using a network of wind measurement arrays of high density in the Kyushu area", Proceedings of the 13th National Symposium on Wind Engineering, Tokyo, Japan, 49-54, Dec.
  3. Maeda, J., Tomonobu, N. and Miyazaki, F. (1995), "Wide area network system of wind measurement utilizing power transmission line systems", Proceedings of the First International Symposium on Cable Dynamics, Liege, Belgium, 537-544.
  4. Maeda, J. (1996), "Gusty wind observation utilizing a measurement array of high density", Abstract of Third International Colloquium on Bluff Body Aerodynamics & Applications, Blacksburg, Virginia, USA, C-IV-1-4.
  5. Maeda, J., Tomokiyo, E., Noguchi, H. and Ishida, N. (2000), "Wind characteristics of typhoon bart based on some observations", Proceedings of 16th National Symposium on Wind Engineering, Tokyo, Japan, 95-100.
  6. Nakamura, H., Tanaka, N., Nakazono, M., Matsuyama, A. and Tomonobu, N. (2000), "Studies on the local wind resistance design of transmission tower-conductor systems (2nd Report, A Simple Criterion of Special Topography and an Estimation Method of Design Wind Velocity Based on Numerical Simulation)", J. Wind Eng., 82, 49-60.

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
  2. METHOD OF IDENTIFYING AFFECTOR ON RESIDENTIAL DAMAGE DUE TO STRONG WIND vol.74, pp.642, 2004, https://doi.org/10.3130/aijs.74.1423
  3. Stability behavior of the transmission line system under incremental dynamic wind load vol.31, pp.6, 2004, https://doi.org/10.12989/was.2020.31.6.509