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GPR an IR thermography for near-surface defect detection in building structures

  • Ground penetrating radar (GPR) and infrared (IR) thermography techniques have been used in many civil engineering applications for the structural visualization and defect detection. However, validation tests of the methods performance for the defection of defects in the nearsurface region with respect to the defects different material and depth below the surface are lacking. To overcome this, we performed GPR and IR thermography tests where the different material properties, shape and depth of defects were studied on concrete and the evaluation of seismic related damage propagation was assessed on stone masonry walls. The results showed that IR thermography, though being greatly affected by the presence of water in the specimen, outperformed GPR in the detection of defects very close to the surface. However, already at the depth of 3 cm and further up till almost 7.5 cm, the performance of GPR resembles the one of IR thermography for the detection of polystyrene (air) voids. On theGround penetrating radar (GPR) and infrared (IR) thermography techniques have been used in many civil engineering applications for the structural visualization and defect detection. However, validation tests of the methods performance for the defection of defects in the nearsurface region with respect to the defects different material and depth below the surface are lacking. To overcome this, we performed GPR and IR thermography tests where the different material properties, shape and depth of defects were studied on concrete and the evaluation of seismic related damage propagation was assessed on stone masonry walls. The results showed that IR thermography, though being greatly affected by the presence of water in the specimen, outperformed GPR in the detection of defects very close to the surface. However, already at the depth of 3 cm and further up till almost 7.5 cm, the performance of GPR resembles the one of IR thermography for the detection of polystyrene (air) voids. On the plastered masonry walls, IR thermography could detect an air gap resulting from plaster delamination as small as 2 mm. Moreover, structural cracking resulting from the induced lateral load could be detected at an early stage.zeige mehrzeige weniger

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Metadaten
Autor*innen:P. Cotic, Z. Jaglicic, V. Bosiljkov, Ernst NiederleithingerORCiD
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):12th International conference of the Slovenian society for non-destructive testing - Application of contemporary non-destructive testing in engineering
Jahr der Erstveröffentlichung:2013
Erste Seite:1
Letzte Seite:8
Freie Schlagwörter:Concrete; Defects; Ground; Masonry; Near-surface defects; Non-destructive testing validation; Radar; Thermography
Veranstaltung:12th International conference of the Slovenian society for non-destructive testing - Application of contemporary non-destructive testing in engineering
Veranstaltungsort:Ljubljana, Slovenia
Beginndatum der Veranstaltung:04.09.2013
Enddatum der Veranstaltung:06.09.2013
URL:http://www.ndt.net/article/ndt-slovenia2013/papers/225.pdf
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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