Electrical Transmission and Substation Structures 2022
Hurricane Fragility Analysis of Electrical Transmission Towers
Publication: Electrical Transmission and Substation Structures 2022: Innovating for Critical Global Infrastructure
ABSTRACT
Hurricanes are one of the main causes for blackouts and related infrastructure damage in the United States. Electrical transmission towers, which are key parts of the electrical transmission networks, are vulnerable to high wind speeds during storms. This research introduces a framework to develop fragility curves that describe collapse probabilities of transmission towers under hurricanes. The intensity measure of fragility curves is the storm-maximum gust wind speed, and incremental dynamic analysis (IDA) is used to capture the collapse phenomenon. The fragility curve is expressed as the cumulative distribution function of the intensity measure at the onset of collapse, which is assumed to follow a lognormal distribution. The record-to-record randomness of different hurricanes is considered by running IDA analysis for a suite of hurricane wind speed and direction time histories, which are selected from 10,000-year synthetic hurricanes. The two parameters of the lognormal distribution are estimated using the method of moments.
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ACKNOWLEDGEMENTS
The authors wish to thank Dr. Weichiang Pang for providing the synthetic hurricane catalog, and the DesignSafe project and the National Science Foundation for providing high-performance computing allocations. The authors also wish to thank Dr. Hao Sun and Mr. Robert Bailey Bond for their assistance in selection of the hurricane wind records. The material is based upon work supported by National Science Foundation under Grant No. CRISP-1638234 and Northeastern University. This support is gratefully acknowledged. Any opinions, findings, and conclusions expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or other sponsors.
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Published In
Electrical Transmission and Substation Structures 2022: Innovating for Critical Global Infrastructure
Pages: 348 - 357
Editor: Tim Cashman
ISBN (Online): 978-0-7844-8446-3
Copyright
© 2022 American Society of Civil Engineers.
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Published online: Sep 20, 2022
Published in print: Sep 20, 2022
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