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Review of Failed Transmission Line Towers during Full Scale Testing


Affiliations
1 Mechanical Engineering Division, Central Power Research Institute (CPRI), Bangalore – 560080, Karnataka, India
     

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Towers are the most important component of the overhead power transmission line system. When failure occurs, direct and indirect losses are very high; hence accurate prediction of tower failure becomes very important for the reliability and safety of the transmission system. One cannot accurately predict the behavior of tower after practical loading conditions, so testing of tower for various loading conditions before installing in field becomes very important. The present paper discusses the structural behavior of towers during full scale testing carried out at Central Power Research Institute, Bangalore, India. Although, the towers were safe for various loading conditions based on the design/analysis, during full scale testing, different types of premature failures were observed. Necessary modifications in towers have been carried out and these towers were retested successfully. The details of remedial measures/strengthening of members carried out during testing are brought out in this paper.

Keywords

Broken Wire Condition, Normal Condition, Redundant Members, Transmission Line Towers.
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  • Albermani F, Kitipornchai S, et al. Failure analysis of transmission towers. Engineering Failure Analysis. 2009; 16:1922-8. https://doi.org/10.1016/j.engfailanal.2008.10.001

  • Punse GS. Analysis and design of transmission tower. International Journal of Modern Engineering Research. 2014; 4:116-38.

  • Rao NP, Knight GMS, et al. Investigation of transmission line tower failures. Engineering Failure Analysis. 2010; 17:1127-41. https://doi.org/10.1016/j.engfailanal.2010.01.008

  • Rao NP, Knight GMS, et al. Studies on failure of transmission line towers in testing. Engineering Structures, 2012; 35:55-70. https://doi.org/10.1016/j.engstruct.2011.10.017

  • IS: 802 (Part III)-1978, Use of Structural Steel in Over Head Transmission Line Towers-Code of Practice, Part III Testing, Bureau of Indian Standards, New Delhi, India.

  • Transmission Line Manual. Central Board of Irrigation and Power, India.

  • Test Report T-1/2014-15 to T-60/2014-15, Tower Testing Station, Central Power Research Institute, Bangalore.


Abstract Views: 291

PDF Views: 1




  • Review of Failed Transmission Line Towers during Full Scale Testing

Abstract Views: 291  |  PDF Views: 1

Authors

M. Selvaraj
Mechanical Engineering Division, Central Power Research Institute (CPRI), Bangalore – 560080, Karnataka, India
Veerendra Kumar Shukla
Mechanical Engineering Division, Central Power Research Institute (CPRI), Bangalore – 560080, Karnataka, India

Abstract


Towers are the most important component of the overhead power transmission line system. When failure occurs, direct and indirect losses are very high; hence accurate prediction of tower failure becomes very important for the reliability and safety of the transmission system. One cannot accurately predict the behavior of tower after practical loading conditions, so testing of tower for various loading conditions before installing in field becomes very important. The present paper discusses the structural behavior of towers during full scale testing carried out at Central Power Research Institute, Bangalore, India. Although, the towers were safe for various loading conditions based on the design/analysis, during full scale testing, different types of premature failures were observed. Necessary modifications in towers have been carried out and these towers were retested successfully. The details of remedial measures/strengthening of members carried out during testing are brought out in this paper.

Keywords


Broken Wire Condition, Normal Condition, Redundant Members, Transmission Line Towers.

References





DOI: https://doi.org/10.33686/pwj.v15i2.150402