Uncertainty Analysis of the Dynamic Responses of a Transmission Tower-Line System Subjected to Cable Rupture
Publication: Journal of Aerospace Engineering
Volume 34, Issue 1
Abstract
Because transmission tower-line systems are always exposed to the natural environment, such structures are vulnerable to various meteorological conditions, and the rupture of a transmission line is a particularly serious potential accident. Although many studies have been conducted on the dynamic responses of transmission towers subjected to cable rupture, few have considered the uncertainties that exist in the structures of transmission towers. To investigate the effects of the uncertainties in material properties and geometric parameters on the dynamic responses caused by cable rupture, a finite-element (FE) model is established in Abaqus; then deterministic, sensitivity, and probability analyses are conducted in succession. This study reveals that the yield strength and geometric size of diagonal members have significant effects on the responses of a transmission tower subjected to conductor rupture. In addition, based on the probability analysis, the results of the deterministic analysis are reliable, and structures under a conductor rupture load have a substantial probability of being partially damaged, which means that current design codes must be improved.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request. The specific items are listed as follows:
1.
Data, including the displacement history at each measuring point, time history of the rotation angle at each measuring point, and the result of sampling;
2.
FE model of a tower-line system; and
3.
Codes, including the technical code for the design of tower and pole structures of overhead transmission lines, the standard for the design of high-rise structures, and a unified standard for the reliability design of building structures.
Acknowledgments
This research was financially supported by the National Natural Science Foundation of China (Awards Nos. 51778347 and 51578325) and the Young Scholars Program of Shandong University (Award No. 2017WLJH33).
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Published In
Journal of Aerospace Engineering
Volume 34 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 29, 2020
Accepted: Jun 12, 2020
Published online: Sep 18, 2020
Published in print: Jan 1, 2021
Discussion open until: Feb 18, 2021
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