PSI - Issue 62

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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

ScienceDirect

Procedia Structural Integrity 62 (2024) 848–855

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Vision-based dynamic monitoring of a post-tensioned concrete bridge under vehicular traffic Fabio Micozzi, Michele Morici, Alessandro Zona* , Andrea Dall’Asta School of Architecture and Design, University of Camerino, Viale della Rimembranza 3, Ascoli Piceno 63100, Italy Abstract Computer vision for the purpose of structural dynamic monitoring of bridges has received much interest in recent years given the possibility of measuring displacement time-histories in absence of stationary points, using hardware that has accessible costs and is easy to operate. The review of the state-of-the-art shows that vision-based monitoring can potentially provide results equivalent to those obtained with the use of well-established contact sensors such as displacement transducers and accelerometers. Applications to real full-scale steel bridges and footbridges showed the possibilities of this technology in real-world conditions as well as difficulties and challenges posed by the surrounding environment. However, despite the many contributions published in the technical literature, very few applications involved post-tensioned concrete bridges, a very common solutions in the Italian road network and in many other countries. Characterized by a stiffer response as compared to steel bridges and footbridges, post tensioned concrete bridges with their lower displacement magnitude and higher natural frequency might represent a more demanding testbed for vision-based monitoring. Accordingly, this study focused on the performance analysis of a vision-based structural monitoring system when applied to medium-span post-tensioned simply supported concrete bridges. The experimental outcomes show very interesting potentialities together with some critical aspects relevant to the vibrations induced in the tripod supporting the video camera that require attention to ensure the accuracy of the measurements. © 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 Scientific Board Members II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Vision-based dynamic monitoring of a post-tensioned concrete bridge under vehicular traffic Fabio Micozzi, Michele Morici, Alessandro Zona* , Andrea Dall’Asta School of Architecture and Design, University of Camerino, Viale della Rimembranza 3, Ascoli Piceno 63100, Italy Abstract Computer vision for the purpose of structural dynamic monitoring of bridges has received much interest in recent years given the possibility of measuring displacement time-histories in absence of stationary points, using hardware that has accessible costs and is easy to operate. The review of the state-of-the-art shows that vision-based monitoring can potentially provide results equivalent to those obtained with the use of well-established contact sensors such as displacement transducers and accelerometers. Applications to real full-scale steel bridges and footbridges showed the possibilities of this technology in real-world conditions as well as difficulties and challenges posed by the surrounding environment. However, despite the many contributions published in the technical literature, very few applications involved post-tensioned concrete bridges, a very common solutions in the Italian road network and in many other countries. Characterized by a stiffer response as compared to steel bridges and footbridges, post tensioned concrete bridges with their lower displacement magnitude and higher natural frequency might represent a more demanding testbed for vision-based monitoring. Accordingly, this study focused on the performance analysis of a vision-based structural monitoring system when applied to medium-span post-tensioned simply supported concrete bridges. The experimental outcomes show very interesting potentialities together with some critical aspects relevant to the vibrations induced in the tripod supporting the video camera that require attention to ensure the accuracy of the measurements. © 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 Scientific Board Members © 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 Scientific Board Members

Keywords: Structural Monitoring; Experimental Testing; Computer Vision; Image Processing; Contactless Sensors. Keywords: Structural Monitoring; Experimental Testing; Computer Vision; Image Processing; Contactless Sensors.

* Corresponding author. Tel.: +39 0737 40 4287. E-mail address: alessandro.zona@unicam.it * Corresponding author. Tel.: +39 0737 40 4287. E-mail address: alessandro.zona@unicam.it

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 Scientific Board Member s 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 Scientific Board Member s

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