Fragility Analysis of Transmission Towers with a Strong Wind Based on First-Passage Failure Criterion

ZHAO Zihan; XIAO Kai; XIAO Yiqing; LI Chao; ZHANG Wentong

doi:10.13204/j.gyjzG20121012

Volume 53 Issue 4

Apr. 2023

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ZHAO Zihan, XIAO Kai, XIAO Yiqing, LI Chao, ZHANG Wentong. Fragility Analysis of Transmission Towers with a Strong Wind Based on First-Passage Failure Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 15-21. doi: 10.13204/j.gyjzG20121012

Citation:

ZHAO Zihan, XIAO Kai, XIAO Yiqing, LI Chao, ZHANG Wentong. Fragility Analysis of Transmission Towers with a Strong Wind Based on First-Passage Failure Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 15-21. doi: 10.13204/j.gyjzG20121012

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Fragility Analysis of Transmission Towers with a Strong Wind Based on First-Passage Failure Criterion

doi: 10.13204/j.gyjzG20121012

1. Department of Civil Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;
2. Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China;
3. Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China

Received Date: 2020-12-10
Available Online: 2023-07-01

Abstract

Abstract

The capacity curves of lattice transmission towers under wind loading were first calculated based on current design codes. According to the stress characteristics of structural components, three performance indexes under the first-passage failure criterion were discussed by using the displacement angle of the tower top as an indicator. Then, these indexes were validated by implementing the statistical analysis based on the Latin Hypercube Sampling (LHS) of equivalent static calculation. Thirdly, the fragility curves under unfavorable wind directions were calculated with the uncertain characteristics of the vertex displacement angle. These results were validated with an overhead transmission line-tower system by using the first-passage failure theory. Wind speeds corresponding to the HCLPF (High Confidence, Low Probability of Failure) results showed that the results under different methods were very close to each other, but the LHS approach had higher calculation efficiency.
- transmission tower,
- capacity curve,
- fragility curve,
- HCLPF,
- first-passage failure

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References(20)

References

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