Abstract
It is generally accepted that climate change is leading to increased frequency of extreme weather events worldwide, and this is placing heavier demands on an already aging infrastructure-network. Bridges are particularly vulnerable infrastructure assets that are prone to damage or failure from climate-related actions. In particular, bridges over waterways can be adversely affected by flooding, specifically the washing away of foundation soils, a mechanism known as scour erosion. Scour is the leading cause of failure for bridges with foundations in water as it can rapidly compromise foundation stiffness often resulting in unacceptable movements or even collapse. There is growing interest among asset managers in applying health monitoring approaches to assess the real-time performance of bridges under damaging actions, including scour. Sensor-based approaches involve the acquisition of data such as dynamic measurements, which can be used to infer the existence of scour or other damage without the laborious requirements of undertaking visual inspections. In this paper, a framework is proposed to assess the benefit obtained from health monitoring systems as compared to the scenario where no monitoring system is employed on a bridge, to ascertain how useful these systems are at assisting decision-making. Decisions typically relate to the implementation of traffic restrictions or even partial or complete bridge closure in the event of damage being detected, which has associated consequences for a network. A case study is presented to demonstrate the approach postulated in this paper.
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Acknowledgements
This study was partially funded by the Italian Civil Protection Department within the project DPC-RELUIS 2019-RS4 ‘Monitoring and satellite data’. The second author would like to thank the Faculty of Engineering, University of Nottingham for funding to enable this collaboration.
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Giordano, P.F., Prendergast, L.J. & Limongelli, M.P. A framework for assessing the value of information for health monitoring of scoured bridges. J Civil Struct Health Monit 10, 485–496 (2020). https://doi.org/10.1007/s13349-020-00398-0
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DOI: https://doi.org/10.1007/s13349-020-00398-0