Identification of inhomogeneous concrete ...
Type de document :
Communication dans un congrès avec actes
Titre :
Identification of inhomogeneous concrete cover by non-contact ultrasonic method
Auteur(s) :
Piwakowski, Bogdan [Auteur]
Centrale Lille
Liu, Qiang [Auteur]
Centrale Lille
Balayssac, Jean-Paul [Auteur]
Laboratoire Matériaux et Durabilité des constructions [LMDC]
Villain, Géraldine [Auteur]
Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux [IFSTTAR]
Garnier, Vincent [Auteur]
Ondes et Imagerie [O&I]
Kaczamrek, Mariusz [Auteur]
Kazimierz Wielki University [UKW]
Drelich, Radoslaw [Auteur]
Kazimierz Wielki University [UKW]
Centrale Lille
Liu, Qiang [Auteur]
Centrale Lille
Balayssac, Jean-Paul [Auteur]
Laboratoire Matériaux et Durabilité des constructions [LMDC]
Villain, Géraldine [Auteur]
Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux [IFSTTAR]
Garnier, Vincent [Auteur]
Ondes et Imagerie [O&I]
Kaczamrek, Mariusz [Auteur]
Kazimierz Wielki University [UKW]
Drelich, Radoslaw [Auteur]
Kazimierz Wielki University [UKW]
Éditeur(s) ou directeur(s) scientifique(s) :
Le Cam
Vincent and Mevel
Laurent and Schoefs
Franck
Vincent and Mevel
Laurent and Schoefs
Franck
Titre de la manifestation scientifique :
EWSHM - 7th European Workshop on Structural Health Monitoring
Organisateur(s) de la manifestation scientifique :
IFFSTTAR, Inria, Université de Nantes
Ville :
Nantes
Pays :
France
Date de début de la manifestation scientifique :
2014-07-08
Date de publication :
2014
Mot(s)-clé(s) en anglais :
Civil engineering SHM applications
Ultrasonic for (seismic
acoustic) methods
Guided waves
Ultrasonic for (seismic
acoustic) methods
Guided waves
Discipline(s) HAL :
Physique [physics]/Mécanique [physics]
Sciences de l'ingénieur [physics]/Mécanique [physics.med-ph]
Mathématiques [math]/Statistiques [math.ST]
Statistiques [stat]/Théorie [stat.TH]
Sciences de l'ingénieur [physics]/Mécanique [physics.med-ph]
Mathématiques [math]/Statistiques [math.ST]
Statistiques [stat]/Théorie [stat.TH]
Résumé en anglais : [en]
Concrete cover degradation is induced by aggressive agents in ambiance, chemicals, moisture, or temperature variations. Due to this degradation concrete becomes inhomogeneous and usually a thin surface layer appears with ...
Lire la suite >Concrete cover degradation is induced by aggressive agents in ambiance, chemicals, moisture, or temperature variations. Due to this degradation concrete becomes inhomogeneous and usually a thin surface layer appears with porosity and elastic modulus different than the properties of deeper sound concrete. Therefore the on-site nondestructive evaluation of concrete cover is important to monitor the integrity of concrete structures and prevent their irreversible damage. In this paper the methodology applied by the classical technique used for ground structure recovery called Multichannel Analysis of Surface Waves (MASW) is used as the NDT tool to characterize the thickness and elastic modulus of concrete cover. The procedure consists in generation and reception of surface waves within the required frequency band, using the non-contact transducers which scan evaluated profiles. Then the phase velocity dispersion characteristic V(f) is extracted, and concrete cover is characterized using as the proposed velocity gradient. The dispersion characteristics are exploited by the inversion software in order to obtain the variation of shear wave velocity as a function of depth.Lire moins >
Lire la suite >Concrete cover degradation is induced by aggressive agents in ambiance, chemicals, moisture, or temperature variations. Due to this degradation concrete becomes inhomogeneous and usually a thin surface layer appears with porosity and elastic modulus different than the properties of deeper sound concrete. Therefore the on-site nondestructive evaluation of concrete cover is important to monitor the integrity of concrete structures and prevent their irreversible damage. In this paper the methodology applied by the classical technique used for ground structure recovery called Multichannel Analysis of Surface Waves (MASW) is used as the NDT tool to characterize the thickness and elastic modulus of concrete cover. The procedure consists in generation and reception of surface waves within the required frequency band, using the non-contact transducers which scan evaluated profiles. Then the phase velocity dispersion characteristic V(f) is extracted, and concrete cover is characterized using as the proposed velocity gradient. The dispersion characteristics are exploited by the inversion software in order to obtain the variation of shear wave velocity as a function of depth.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Source :
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