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Abstract
Early detection of damage is necessary for the safe and reliable use of civil engineering structures made of concrete. Recently, the identification of micro-cracks in concrete has become an area of growing interest, especially using wave-based techniques. In this paper, a non-destructive testing approach for the characterization of the fracture process was presented. Experimental tests were made on concrete beams subjected to mechanical degradation in a 3-point bending test. The ultrasonic waves were registered on a specimen surface by piezoelectric transducers located at several points. Then, the signals were processed taking advantage of the wave scattering due to micro-cracks disturbances. For early-stage damage detection, coda wave interferometry was used. The novelty of the work concerns the application of the complex decorrelation matrix and the moving reference trace approach for better distinguishment of sensors located at different parts of a crack zone. To enhance coda wave-based damage identification results, optical imaging of crack development was performed by digital image correlation measurement. Obtained results showed that the coda wave interferometry technique can be successfully used as a quantitative measure of changes in the structure of concrete. The results also indicated that the course of decorrelation coefficient curves enabled the identification of three stages during degradation and it depended on the location of acquisition points regarding the crack zone.
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/bpasts.2023.144118
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Bulletin of the Polish Academy of Sciences-Technical Sciences
no. 71,
pages 1 - 7,
ISSN: 0239-7528 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Knak M., Wojtczak E., Rucka M.: Coda wave interferometry in monitoring the fracture process of concrete beams under bending test// Bulletin of the Polish Academy of Sciences-Technical Sciences -Vol. 71,iss. 3 (2023), s.1-7
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/bpasts.2023.144118
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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