PSI - Issue 64

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 137–144

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Performance Assessment of Overhead Conductors Subjected to Combined Thermal and Wind Loads Jayathilake S. a *, Rajeev P. a , Gad E. a a Swinburne University of Technology, Hawthorn, 3122, Australia. Abstract The overhead power conductors carry electricity power from distribution feeders to consumers, providing a necessary service. Aluminium Conductor Steel Reinforced (ACSR) and All Aluminium Conductors (AAC) are widely utilised in the Australian power distribution network. ACSR offers increased strength and conductivity by combining both steel and aluminium strands while AAC offers proper conductivity and lightweight powerlines. Due to factors like current flow, extremely elevated ambient temperatures, direct sunlight exposure, and short circuit currents, these conductors can be subjected to elevated temperature levels. Operating at higher temperatures can alter the mechanical characteristics of the conductor materials. Consequently, the mechanical strength of conductors diminishes when powerlines consistently operate under these conditions. Conductors are set up in various environmental conditions, resulting in different wind load impacts. While the temperature rise can be somewhat offset by these wind variations in terms of cable strength, wind action still introduces additional tensile stress in the conductor. Hence, this research aims to determine the combined effects of thermal and wind factors in the performance of ACSR and AAC cables. The laboratory experimental testing was performed to determine the decrease in the tensile strength of conductors under steady-state elevated temperature scenarios. The Australian standard prediction for wind and thermal conditions is considered for the calculation of the required strength in the conductors. Finally, the long-term safety performance of both ACSR and AAC cables was evaluated by considering the combined effect of temperature and wind effects. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Performance Assessment of Overhead Conductors Subjected to Combined Thermal and Wind Loads Jayathilake S. a *, Rajeev P. a , Gad E. a a Swinburne University of Technology, Hawthorn, 3122, Australia. Abstract The overhead power conductors carry electricity power from distribution feeders to consumers, providing a necessary service. Aluminium Conductor Steel Reinforced (ACSR) and All Aluminium Conductors (AAC) are widely utilised in the Australian power distribution network. ACSR offers increased strength and conductivity by combining both steel and aluminium strands while AAC offers proper conductivity and lightweight powerlines. Due to factors like current flow, extremely elevated ambient temperatures, direct sunlight exposure, and short circuit currents, these conductors can be subjected to elevated temperature levels. Operating at higher temperatures can alter the mechanical characteristics of the conductor materials. Consequently, the mechanical strength of conductors diminishes when powerlines consistently operate under these conditions. Conductors are set up in various environmental conditions, resulting in different wind load impacts. While the temperature rise can be somewhat offset by these wind variations in terms of cable strength, wind action still introduces additional tensile stress in the conductor. Hence, this research aims to determine the combined effects of thermal and wind factors in the performance of ACSR and AAC cables. The laboratory experimental testing was performed to determine the decrease in the tensile strength of conductors under steady-state elevated temperature scenarios. The Australian standard prediction for wind and thermal conditions is considered for the calculation of the required strength in the conductors. Finally, the long-term safety performance of both ACSR and AAC cables was evaluated by considering the combined effect of temperature and wind effects. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

Keywords: ACSR; ACC; Power network; Strength; Australian standard; Deterioration process Keywords: ACSR; ACC; Power network; Strength; Australian standard; Deterioration process

* Corresponding author. Tel.: +61-432 747 247 E-mail address: sjayathilake@swin.edu.au * Corresponding author. Tel.: +61-432 747 247 E-mail address: sjayathilake@swin.edu.au

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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