TY - GEN
T1 - Damage detection in concrete with coda wave interferometry using a 60 kHz ultrasonic signal
AU - Grabke, Stefan
AU - Bletzinger, Kai Uwe
AU - Wüchner, Roland
AU - Clauß, Felix
AU - Ahrens, Mark Alexander
AU - Mark, Peter
N1 - Publisher Copyright:
© 2022 IABSE Symposium Prague, 2022: Challenges for Existing and Oncoming Structures - Report. All rights reserved.
PY - 2022
Y1 - 2022
N2 - Coda wave interferometry is an ultrasound-based possible candidate for structural health monitoring of concrete structures. It is based on a correlation evaluation of two ultrasonic signals. A perturbation, e.g., cracks in the medium are causing changes in the signal. The correlation development over the signal's length is very characteristic for the position of the crack relative to source and receiver. This development can be modeled and allows to state an inverse problem whose solution localizes a new perturbation, e.g., crack in the medium. An application at a four-point bending test of a reinforced concrete specimen with a span of 3.5 m and 25 ultrasonic transducers with a used central frequency of 60 kHz shows promising results for damage detection. The coda technology can successfully distinguish multiple developing cracks and results are compared to fiber optic sensor measurements. Some problems like cracks that develop into the installation position of the ultrasonic transducers are also found and solutions are proposed.
AB - Coda wave interferometry is an ultrasound-based possible candidate for structural health monitoring of concrete structures. It is based on a correlation evaluation of two ultrasonic signals. A perturbation, e.g., cracks in the medium are causing changes in the signal. The correlation development over the signal's length is very characteristic for the position of the crack relative to source and receiver. This development can be modeled and allows to state an inverse problem whose solution localizes a new perturbation, e.g., crack in the medium. An application at a four-point bending test of a reinforced concrete specimen with a span of 3.5 m and 25 ultrasonic transducers with a used central frequency of 60 kHz shows promising results for damage detection. The coda technology can successfully distinguish multiple developing cracks and results are compared to fiber optic sensor measurements. Some problems like cracks that develop into the installation position of the ultrasonic transducers are also found and solutions are proposed.
KW - coda wave interferometry
KW - cracks in concrete
KW - damage detection
KW - diffuse ultrasound
KW - structural health monitoring
UR - http://www.scopus.com/inward/record.url?scp=85133545975&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85133545975
T3 - IABSE Symposium Prague, 2022: Challenges for Existing and Oncoming Structures - Report
SP - 453
EP - 457
BT - IABSE Symposium Prague, 2022
PB - International Association for Bridge and Structural Engineering (IABSE)
T2 - IABSE Symposium Prague 2022: Challenges for Existing and Oncoming Structures
Y2 - 25 May 2022 through 27 May 2022
ER -