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• W4308479220 startingPage "105233" @default.
• W4308479220 abstract "Wind fragility is essential to performance-based wind engineering, risk, and resilience assessment for transmission towers. However, it has not been sufficiently studied due to the key issues in performance evaluation and uncertainty treatment for transmission towers. The performance of high-rise structures can be severely weakened by geometric imperfections, but these impacts have not been well addressed for transmission towers. Besides, the current uncertainty treatment only considers the tower itself although the transmission tower is part of an interconnected tower-line system that has complex interactions with wind environment. Therefore, this paper provides a systemic solution for geometric imperfections of transmission towers, where the users can clearly observe the effect of geometric imperfections on the capacity and failure positions of transmission towers. On this basis, a wind fragility framework that incorporates the uncertainties of each line component, wind environment, and aerodynamic parameters is proposed for transmission towers. Finally, sensitivity analysis was conducted to identify the significant uncertainty parameters for tower capacity and demand by sensitivity diagram. It is found that in addition to the uncertainties of the tower itself, the uncertainties of wind profile exponent, outer diameter and aerodynamic parameter of conductors have significant effects on the fragility of transmission towers. • A systemic solution for geometric imperfections of transmission towers is proposed. • Wind fragility of the tower incorporates the uncertainties of each line component. • Structure-related, wind environment, and aerodynamic uncertainties are considered. • Significant uncertainty parameters are identified through sensitivity analysis." @default.
• W4308479220 created "2022-11-12" @default.
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• W4308479220 date "2022-12-01" @default.
• W4308479220 modified "2023-10-16" @default.
• W4308479220 title "Wind fragility assessment and sensitivity analysis for a transmission tower-line system" @default.
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• W4308479220 doi "https://doi.org/10.1016/j.jweia.2022.105233" @default.
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