A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Depth determination of surface-breaking cracks in concrete slabs using a self-compensating ultrasonic technique
The depth of surface breaking cracks in concrete slabs has been determined by measuring the transmission of surface waves using a roller device with a square configuration of four roller transducers that are used in conjunction with a self-compensating technique. For a two dimensional configuration of a crack normal to the surface of the specimen, the averaged absolute values of the transmission coefficients have been measured for cracks of known depths. From these results, a curve showing (T) versus crack depth has been obtained. This curve can be used as a master curve to determine the depth auf surface breaking cracks in concrete bridge deck and similar structures by comparing transmission coefficients measured in the field with the curve obtained from the specimens. In principle the technique can be utilized in an automatic scan modality to determine the location and the depth of crack in such structures as concrete bridge decks independent of the parameters defining the coupling of the transducer to a concrete surface and independent of surface wave attenuation.
Depth determination of surface-breaking cracks in concrete slabs using a self-compensating ultrasonic technique
The depth of surface breaking cracks in concrete slabs has been determined by measuring the transmission of surface waves using a roller device with a square configuration of four roller transducers that are used in conjunction with a self-compensating technique. For a two dimensional configuration of a crack normal to the surface of the specimen, the averaged absolute values of the transmission coefficients have been measured for cracks of known depths. From these results, a curve showing (T) versus crack depth has been obtained. This curve can be used as a master curve to determine the depth auf surface breaking cracks in concrete bridge deck and similar structures by comparing transmission coefficients measured in the field with the curve obtained from the specimens. In principle the technique can be utilized in an automatic scan modality to determine the location and the depth of crack in such structures as concrete bridge decks independent of the parameters defining the coupling of the transducer to a concrete surface and independent of surface wave attenuation.
Depth determination of surface-breaking cracks in concrete slabs using a self-compensating ultrasonic technique
Tiefenbestimmung von Oberflächenfehlern in Betonplatten mit Hilfe einer selbstkompensierenden Ultraschalltechnik
Cheng, A. (author) / Achenbach, J.D. (author)
1996
8 Seiten, 9 Bilder, 5 Quellen
Conference paper
English
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