A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Monitoring of concrete components structure condition using a nonlinear ultrasonic spectroscopy
Nonlinear ultrasonic spectroscopy methods appear to rank among highly promising methods to identify the structure defects in a wide range of materials. These methods are employing the fact that a crack-induced nonlinearity makes an extremely sensitive material impairment indicator. The paper deals with nonlinear interaction between elastic wave and structural defects in concrete materials. First, the short summary and comparison of various methods of nonlinear ultrasound spectroscopy is shown. Method with one pure harmonic exciting signal which uses the analysis of response frequency spectrum generated from a continuous wave transmission through the sample structure was chosen. In the first stage of the experiment, we have examined whether or not the inhomogeneous concrete material gives rise to parasitic components being able to generate non-linear phenomena in the signal transmission. In the second stage were measured the specimens with structure damaged by the pressing machine and a correlation between the response frequency spectrum and the specimen structure deterioration was looked for. The results showed that the effect of a concrete material inhomogeneity was very low in the case of nonlinear ultrasonic spectroscopy, its nonlinear effect being substantially lower than in cases of common defects. In the second stage was also verified that the transfer functions of degraded specimen correlated fairly with the material structure defects.
Monitoring of concrete components structure condition using a nonlinear ultrasonic spectroscopy
Nonlinear ultrasonic spectroscopy methods appear to rank among highly promising methods to identify the structure defects in a wide range of materials. These methods are employing the fact that a crack-induced nonlinearity makes an extremely sensitive material impairment indicator. The paper deals with nonlinear interaction between elastic wave and structural defects in concrete materials. First, the short summary and comparison of various methods of nonlinear ultrasound spectroscopy is shown. Method with one pure harmonic exciting signal which uses the analysis of response frequency spectrum generated from a continuous wave transmission through the sample structure was chosen. In the first stage of the experiment, we have examined whether or not the inhomogeneous concrete material gives rise to parasitic components being able to generate non-linear phenomena in the signal transmission. In the second stage were measured the specimens with structure damaged by the pressing machine and a correlation between the response frequency spectrum and the specimen structure deterioration was looked for. The results showed that the effect of a concrete material inhomogeneity was very low in the case of nonlinear ultrasonic spectroscopy, its nonlinear effect being substantially lower than in cases of common defects. In the second stage was also verified that the transfer functions of degraded specimen correlated fairly with the material structure defects.
Monitoring of concrete components structure condition using a nonlinear ultrasonic spectroscopy
Zustandsüberwachung von Betonbauteilen mittels nichtlinearer Ultraschallspektrometrie
Korenska, Marta (author) / Matysik, Michal (author) / Plskova, Iveta (author) / Manychova, Monika (author)
2008
6 Seiten, 8 Bilder, 1 Tabelle, 5 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
Concrete Carbonation Monitoring by Nonlinear Ultrasonic Spectroscopy
| British Library Conference Proceedings | 2016
| British Library Conference Proceedings | 1994
| British Library Online Contents | 2017
| British Library Online Contents | 2017