Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Estimation of surface-crack depth in concrete by scanning SIBIE procedure
For maintenance of concrete structures, the depth of a surface crack is an important factor to be estimated in inspection. As the nondestructive testing (NDT), the impact-echo method has been extensively applied to the concrete structures. Wave motions resulting from a shortduration mechanical impact are recorded, and peak frequencies of their spectra are identified. However, frequency spectra cannot always be interpreted successfully as many peaks are often observed. Thus, an imaging procedure is developed, which is named as SIBIE (Stack Imaging of spectral amplitudes Based on Impact Echo). The procedure provides twodimensional (2-D) image of a specimen cross-section. In the present paper, SIBIE procedure is applied to estimating a surface-crack depth of actual cracks generated by a bending test. An accelerometer was employed for the detection. Because the cracks were created in a zigzag manner, a scanning procedure was applied in addition to the conventional one-point detection. It is demonstrated that curved extension of the surface crack is reasonably estimated by a scanning procedure. Thus, it is confirmed that the SIBIE analysis is a promising technique for the crack-depth evaluation in concrete.
Estimation of surface-crack depth in concrete by scanning SIBIE procedure
For maintenance of concrete structures, the depth of a surface crack is an important factor to be estimated in inspection. As the nondestructive testing (NDT), the impact-echo method has been extensively applied to the concrete structures. Wave motions resulting from a shortduration mechanical impact are recorded, and peak frequencies of their spectra are identified. However, frequency spectra cannot always be interpreted successfully as many peaks are often observed. Thus, an imaging procedure is developed, which is named as SIBIE (Stack Imaging of spectral amplitudes Based on Impact Echo). The procedure provides twodimensional (2-D) image of a specimen cross-section. In the present paper, SIBIE procedure is applied to estimating a surface-crack depth of actual cracks generated by a bending test. An accelerometer was employed for the detection. Because the cracks were created in a zigzag manner, a scanning procedure was applied in addition to the conventional one-point detection. It is demonstrated that curved extension of the surface crack is reasonably estimated by a scanning procedure. Thus, it is confirmed that the SIBIE analysis is a promising technique for the crack-depth evaluation in concrete.
Estimation of surface-crack depth in concrete by scanning SIBIE procedure
Abschätzung der Tiefe von Oberflächenrissen in Beton mittels SIBIE-Abtastungsprozedur
Tokai, Masanobu (Autor:in) / Ohkubo, Taro (Autor:in) / Ohtsu, Masayasu (Autor:in)
2009
7 Seiten, 9 Bilder, 4 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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