Failure of Double Circuit Transmission Line Tower Due to Lightning
Publication: Journal of Performance of Constructed Facilities
Volume 19, Issue 2
Abstract
A case of failure of bracings and the associated leg member of a double circuit, transmission line tower was reported from one of the State Electricity Boards of India. The bracings sustained extensive damage and there was visible bending in the leg member. All these members sustained blotches. Except for severe lightning, the weather was normal. Investigations into the causes of failure of the tower brought out that the tower members failed due to temperature induced forces, the temperature rise being due to lightning currents flowing through the members. An analysis of temperature stresses in failed members, their buckling strength, etc. done as a part of the investigation is detailed in this paper.
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Acknowledgments
The writers are grateful to C. P. Hariharan and Preethi, members on the faculty of National Institute of Technology, Calicut, Kerala State, India for their review and comments. The writers are grateful to P. Sajitha, K. M. Vijisha, and K. Sajini, Apprentice Trainees, Govt. of India Scheme, NIT (National Institute of Technology) Calicut for their support in preparation of the manuscript.
References
Bureau of Indian Standards (1992). “Use of structural steel in overhead transmission line towers—Code of practice—Part 1: Material loads and permissible stresses—Section 2: Permissible stresses.” IS: 802-Part 1: Sec 2, New Delhi, India.
Gopalan, T. V. (1979). “Stressing of transmission tower peak by lightning.” J. Energy Div. (Am. Soc. Civ. Eng.), 105(1), 103–115.
Khandagale, R. S. (2001). “Bending of tower members due to lightning.” Proc., Workshop, Lightning Protection to Assets, Facilities and Structures, REC Calicut, India, 27–28.
Uman, M. A. (1988). “Natural and artificially-initiated lightning and lightning test standards.” Proc. IEEE, 76(12), 1548–1565.
Udin, H., Funk, E. R., and Wulff, J. (1954). Welding for engineers, Chapman & Hall, London, 118–127.
Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 19 • Issue 2 • May 2005
Pages: 132 - 137
Copyright
© 2005 ASCE.
History
Received: Aug 22, 2002
Accepted: Apr 9, 2003
Published online: May 1, 2005
Published in print: May 2005
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