Identification of inhomogeneous concrete ...
Document type :
Communication dans un congrès avec actes
Title :
Identification of inhomogeneous concrete cover by non-contact ultrasonic method
Author(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]
Scientific editor(s) :
Le Cam
Vincent and Mevel
Laurent and Schoefs
Franck
Vincent and Mevel
Laurent and Schoefs
Franck
Conference title :
EWSHM - 7th European Workshop on Structural Health Monitoring
Conference organizers(s) :
IFFSTTAR, Inria, Université de Nantes
City :
Nantes
Country :
France
Start date of the conference :
2014-07-08
Publication date :
2014
English keyword(s) :
Civil engineering SHM applications
Ultrasonic for (seismic
acoustic) methods
Guided waves
Ultrasonic for (seismic
acoustic) methods
Guided waves
HAL domain(s) :
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]
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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