Probabilistic analysis of wind-induced failures of transmission tower-line systems

Feng, Y; Stewart, MG

Probabilistic analysis of wind-induced failures of transmission tower-line systems

Feng, Y Stewart, MG

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Publisher:: TAYLOR & FRANCIS LTD
Publication Type:: Journal Article
Citation:: Structure and Infrastructure Engineering, 2025, 21, (11-12), pp. 2101-2114
Issue Date:: 2025-01-01

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Field	Value	Language
dc.contributor.author	Feng, Y
dc.contributor.author	Stewart, MG
dc.date.accessioned	2026-01-30T00:39:12Z
dc.date.available	2026-01-30T00:39:12Z
dc.date.issued	2025-01-01
dc.identifier.citation	Structure and Infrastructure Engineering, 2025, 21, (11-12), pp. 2101-2114
dc.identifier.issn	1573-2479
dc.identifier.issn	1744-8980
dc.identifier.uri	http://hdl.handle.net/10453/192585
dc.description.abstract	Wind loading on a transmission tower structure is affected by the wind field, structural parameters, and the geo-spatial arrangement of the transmission line. This research develops a probabilistic wind-induced performance evaluation framework for transmission tower-line systems by incorporating the effects of wind speed and direction, along with the transmission line orientation. Based on a practical transmission tower-line system in Australia, the system level failure probability of an angled tower-line system, as well as an all-straight tower-line system are calculated by considering various spatial/non-spatially distributed structural and wind field parameters. To boost the computational efficiency by 70%, an adaptive virtual modeling surrogate model as well as a novel polynomial kernel is developed to approximate the system limit state functions when incorporating all sources of structural uncertainties. A sensitivity analysis is implemented to identify critical aerodynamic parameters toward accurate fragility assessment. Comparison studies between all-straight tower-line and angled tower-line system have been conducted to discuss the effects of spatial variabilities, correlation lengths, and wind attack angles toward system fragility. It was found that angled tower-line systems are up to 140% more vulnerable than an all-straight tower-line, and considering spatial variability of tower material properties increased vulnerabilities by 10-20%.
dc.language	English
dc.publisher	TAYLOR & FRANCIS LTD
dc.relation.ispartof	Structure and Infrastructure Engineering
dc.relation.isbasedon	10.1080/15732479.2025.2554724
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.title	Probabilistic analysis of wind-induced failures of transmission tower-line systems
dc.type	Journal Article
utslib.citation.volume	21
utslib.for	0905 Civil Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated	2026-01-30T00:39:11Z
pubs.issue	11-12
pubs.publication-status	Published
pubs.volume	21
utslib.citation.issue	11-12

Abstract:

Wind loading on a transmission tower structure is affected by the wind field, structural parameters, and the geo-spatial arrangement of the transmission line. This research develops a probabilistic wind-induced performance evaluation framework for transmission tower-line systems by incorporating the effects of wind speed and direction, along with the transmission line orientation. Based on a practical transmission tower-line system in Australia, the system level failure probability of an angled tower-line system, as well as an all-straight tower-line system are calculated by considering various spatial/non-spatially distributed structural and wind field parameters. To boost the computational efficiency by 70%, an adaptive virtual modeling surrogate model as well as a novel polynomial kernel is developed to approximate the system limit state functions when incorporating all sources of structural uncertainties. A sensitivity analysis is implemented to identify critical aerodynamic parameters toward accurate fragility assessment. Comparison studies between all-straight tower-line and angled tower-line system have been conducted to discuss the effects of spatial variabilities, correlation lengths, and wind attack angles toward system fragility. It was found that angled tower-line systems are up to 140% more vulnerable than an all-straight tower-line, and considering spatial variability of tower material properties increased vulnerabilities by 10-20%.

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http://hdl.handle.net/10453/192585