PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 64 (2024) 531–538

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Cable tension estimation of cable-stayed bridge using vision-based modal identification Cevdet Enes Cukaci a, *, Serdar Soyoz a a Department of Civil Engineering, Bogazici University, Istanbul, 34342, Turkey Abstract In this study, it is aimed to estimate the cable tensions of the Komurhan Cable-Stayed Bridge using vision-based modal identification and to verify the vision-based modal identification by comparing cable tensions with the existing monitoring system. First, cable tensions were determined by a lift-off testing and estimated using the vibration response under seismic events recorded by existing acceleration sensors on the bridge. In these methods, only 8 of 42 cables are continuously monitored with the existing monitoring system. Then, all cable tensions were estimated by vision-based modal identification using video recordings. These cable tensions gave consistent results compared to the 8 cables in the existing monitoring system. Thus, vision based modal identification has been verified. With this method, multiple cable tensions can be simultaneously estimated from a single video recording without requiring access to the structure. © 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: Cable-stayed bridge; Image processing; Vibration method; Vision-based identification. 1. Introduction In recent years, the number of structures where cables are used as the main load-bearing elements has been increasing worldwide with the advancements in analysis technologies, material properties, and construction methods. Cable-stayed and suspension bridges, which are cable-supported structure types, are important in crossing large spans with efficient structural design and excellent aesthetic. The bridge deck is carried by the stay cables and this SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Cable tension estimation of cable-stayed bridge using vision-based modal identification Cevdet Enes Cukaci a, *, Serdar Soyoz a a Department of Civil Engineering, Bogazici University, Istanbul, 34342, Turkey Abstract In this study, it is aimed to estimate the cable tensions of the Komurhan Cable-Stayed Bridge using vision-based modal identification and to verify the vision-based modal identification by comparing cable tensions with the existing monitoring system. First, cable tensions were determined by a lift-off testing and estimated using the vibration response under seismic events recorded by existing acceleration sensors on the bridge. In these methods, only 8 of 42 cables are continuously monitored with the existing monitoring system. Then, all cable tensions were estimated by vision-based modal identification using video recordings. These cable tensions gave consistent results compared to the 8 cables in the existing monitoring system. Thus, vision based modal identification has been verified. With this method, multiple cable tensions can be simultaneously estimated from a single video recording without requiring access to the structure. © 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: Cable-stayed bridge; Image processing; Vibration method; Vision-based identification. 1. Introduction In recent years, the number of structures where cables are used as the main load-bearing elements has been increasing worldwide with the advancements in analysis technologies, material properties, and construction methods. Cable-stayed and suspension bridges, which are cable-supported structure types, are important in crossing large spans with efficient structural design and excellent aesthetic. The bridge deck is carried by the stay cables and this © 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

* Cevdet Enes Cukaci. Tel.: +90-212-359-6428; +90-212-287-2457. E-mail address: cevdet.cukaci@bogazici.edu.tr * Cevdet Enes Cukaci. Tel.: +90-212-359-6428; +90-212-287-2457. E-mail address: cevdet.cukaci@bogazici.edu.tr

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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