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Damage Detection at a Reinforced Concrete Specimen with Coda Wave Interferometry
Article

Correlation of Load-Bearing Behavior of Reinforced Concrete Members and Velocity Changes of Coda Waves

1
Institute of Concrete Structures, Faculty of Civil and Environmental Engineering, Ruhr University Bochum, Universitätstraße 150, 44801 Bochum, Germany
2
Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Christoph Gehlen and Christian Große
Materials 2022, 15(3), 738; https://doi.org/10.3390/ma15030738
Received: 22 December 2021 / Revised: 10 January 2022 / Accepted: 17 January 2022 / Published: 19 January 2022
(This article belongs to the Special Issue Concrete and Concrete Structures Monitored by Ultrasound)
The integral collection of information such as strains, cracks, or temperatures by ultrasound offers the best prerequisites to monitor structures during their lifetime. In this paper, a novel approach is proposed which uses the collected information in the coda of ultrasonic signals to infer the condition of a structure. This approach is derived from component tests on a reinforced concrete beam subjected to four-point bending in the lab at Ruhr University Bochum. In addition to ultrasonic measurements, strain of the reinforcement is measured with fiber optic sensors. Approached by the methods of moment-curvature relations, the steel strains serve as a reference for velocity changes of the coda waves. In particular, a correlation between the relative velocity change and the average steel strain in the reinforcement is derived that covers 90% of the total bearing capacity. The purely empirical model yields a linear function with a high level of accuracy (R2=0.99, RMSE90μstrain). View Full-Text
Keywords: ultrasound; coda wave interferometry; structural health monitoring; strain; stress; reinforced concrete; moment-curvature relationship; tests; cracking; fiber optic sensors ultrasound; coda wave interferometry; structural health monitoring; strain; stress; reinforced concrete; moment-curvature relationship; tests; cracking; fiber optic sensors
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MDPI and ACS Style

Clauß, F.; Epple, N.; Ahrens, M.A.; Niederleithinger, E.; Mark, P. Correlation of Load-Bearing Behavior of Reinforced Concrete Members and Velocity Changes of Coda Waves. Materials 2022, 15, 738. https://doi.org/10.3390/ma15030738

AMA Style

Clauß F, Epple N, Ahrens MA, Niederleithinger E, Mark P. Correlation of Load-Bearing Behavior of Reinforced Concrete Members and Velocity Changes of Coda Waves. Materials. 2022; 15(3):738. https://doi.org/10.3390/ma15030738

Chicago/Turabian Style

Clauß, Felix, Niklas Epple, Mark A. Ahrens, Ernst Niederleithinger, and Peter Mark. 2022. "Correlation of Load-Bearing Behavior of Reinforced Concrete Members and Velocity Changes of Coda Waves" Materials 15, no. 3: 738. https://doi.org/10.3390/ma15030738

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