Study on Detection Limit of Buried Defects in Concrete Structures by Using Infrared Thermography

Study on Detection Limit of Buried Defects in Concrete Structures by Using Infrared Thermography

Bibliografiset tiedot
Parent link:Key Engineering Materials
Vol. 270-273.— 2004.— [P. 1549-1555]
Päätekijä: Kamoi A. Arao
Muut tekijät: Okamoto Y. Yosizo, Vavilov V. P. Vladimir Platonovich
Yhteenveto:Title screen
In Japan it happens that concrete parts suddenly collapse to create obstacles to the traffic in tunnels, on highways and bridges. Thus, the safety issue has become a serious social problem. Therefore, the detection of hidden defects in concrete building constructions in order to prevent an accidental damage is the important application area for nondestructive testing (NDT) techniques. Until now, the inspection is typically performed by using a hammer that is subjective and takes too much time. Infrared thermography is a promising NDT technique that might help in the fast detection of invisible (hidden) defects. Transient, or active, thermal NDT requires external thermal stimulation of the objects under test by warming up or cooling down the object surface. However, low-power and long heating is significantly affected by environmental conditions. Recent Japanese research in this area has been rather qualitative, i.e. without putting the accent on evaluating parameters of hidden defects. In this study, the experimental results are modeled and processed by using the thermal NDT software package developed at the Tomsk Institute of Introscopy. This has allowed not only optimizing test parameters but also obtaining reasonable estimates of defect parameters for air-filled voids and inclusions in concrete. It is shown that MRTD values measured by ourselves for the first time are of a little help while evaluating detection limit
Режим доступа: по договору с организацией-держателем ресурса
Kieli:englanti
Julkaistu: 2004
Aiheet:
электронный ресурс
труды учёных ТПУ
nondestructive testing
неразрушающий контроль
термография
thermography
Linkit:http://www.scientific.net/KEM.270-273.1549
Aineistotyyppi: Elektroninen Kirjan osa
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=637149

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