Abstract
Public transportation agencies need reliable monitoring technologies to provide advance warnings of performance loss and potential pending failure of their valuable assets, probability of which may increase due to climate change and extreme weather events. To address this concern, a partnership was formed to validate an innovative monitoring approach that can measure bridge displacements remotely from radar satellite imagery by comparing its measurements to theoretical predictions. A previous validation study on a new bridge made of concrete deck on steel girders found a good match between satellite-measured thermal displacements and those from theoretical predictions. With the aim of validating the approach on various types of bridges, this publication presents the findings of additional validation studies on two historical bridges, each with a deck supported by a steel truss superstructure. Two sets of satellite imagery with different look angles were used to decompose the oblique measurements into vertical and longitudinal displacements for direct comparison with theoretical predictions. The results confirmed the validity of the approach and indicated which bridge features can be best accurately monitored by radar satellites.
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Acknowledgments
The authors would like to acknowledge the financial contributions from Transport Canada (with special thanks to Daniel Hébert and Howard Posluns) and Infrastructure Canada through NRC’s Initiative entitled Climate-Resilient Buildings and Core Public Infrastructure. The technical assistance from the owners/operators of the monitored bridges is greatly appreciated, including Emanuel Chênevert from Jacques Cartier and Champlain Bridges Inc., and Hoat Le from Canadian National Railway. This contribution was critically reviewed by David Huntley (Geological Survey of Canada).
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Cusson, D., Ozkan, I., Greene Gondi, F., Eppler, J. (2021). Remote Monitoring of Highway Bridges with RADARSAT-2 Satellite: Validation Case Study on Jacques Cartier and Victoria Bridges in Montreal, Canada. In: Singhroy, V. (eds) Advances in Remote Sensing for Infrastructure Monitoring. Springer Remote Sensing/Photogrammetry. Springer, Cham. https://doi.org/10.1007/978-3-030-59109-0_7
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DOI: https://doi.org/10.1007/978-3-030-59109-0_7
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