Abstract
The Éric Tabarly bridge in Nantes is a 210 m long cable-stayed road bridge crossing the Loire River, that was inaugurated in 2011. It is composed of a 27 m wide steel deck divided into two spans by a 57 m high steel pylon, being the main span 143 m long. In the context of the European Research Project DESDEMONA (DEtection of Steel DEfects by Enhanced MONitoring and Automated procedure for self-inspection and maintenance), the bridge has been equipped with a dynamic monitoring system, constituted of 16 uniaxial accelerometers installed both on the deck and on the Pylon, with accelerations being recorded with a sampling rate of 100 Hz. This paper describes the dynamic monitoring system installed in the bridge and the results achieved during the first months of operation, including the characterization of vibration levels (maximum and effective values) as well as the automatic identification of the bridge modal properties. Finally, the effects of operational and environmental conditions on modal properties are studied.
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Acknowledgments
This work was financially supported by: 1) Base Funding - UIDB/04708/2020 and Programmatic Funding - UIDP/04708/2020 of the CONSTRUCT - Instituto de I&D em Estruturas e Construções - funded by national funds through the FCT/MCTES (PIDDAC); 2) Research Project DESDEMONA - DEtection of Steel DEfects by Enhanced MONitoring and Automated procedure for self-inspection and maintenance, funded by the Research Fund for Coal and Steel (European Commission).
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Pereira, S., Magalhães, F., Caetano, E., Cunha, Á., Toullier, T., Dumoulin, J. (2023). Dynamic Monitoring of a Cable-Stayed Bridge: Monitoring System and First Results. In: Rizzo, P., Milazzo, A. (eds) European Workshop on Structural Health Monitoring. EWSHM 2022. Lecture Notes in Civil Engineering, vol 254. Springer, Cham. https://doi.org/10.1007/978-3-031-07258-1_4
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DOI: https://doi.org/10.1007/978-3-031-07258-1_4
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