ORBi: Van der Wielen Audrey - GPR Limits for Thin Layers in Concrete Detection: Numerical and Experimental Evaluation

Reference : GPR Limits for Thin Layers in Concrete Detection: Numerical and Experimental Evaluation


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/86487

Title :	GPR Limits for Thin Layers in Concrete Detection: Numerical and Experimental Evaluation
Language :	English
Author, co-author :	Van der Wielen, Audrey [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil >]
	Courard, Luc [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil >]
	Nguyen, Frédéric [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Publication date :	Mar-2011
Main document title :	Progress In Electromagnetics Research Symposium Proceedings, Marrakesh, Morocco, March 20-23, 2011
Publisher :	The Electromagnetics Academy
Pages :	1804-1807
On invitation :	No
Audience :	International
ISBN :	978-1-934142-16-5
City :	Cambridge
Country :	MA
Event name :	29th Progress In Electromagnetics Research Symposium
Event date :	du 20 mars 2011 au 23 mars 2011
Event organizer :	PIERS
Event place (city) :	Marrakech
Event country :	Maroc
Keywords :	[en] GPR ; Thin bed ; FDTD simulation
Abstract :	[en] The Ground Penetrating Radar (GPR) is a nondestructive technique increasingly used in civil structures inspection. In those structures, thin layers, presenting a relatively small thickness compared to their area, are common and induce a complex multiple reflection scheme of the GPR waves on the two interfaces limiting the layer. The theoretical relationships predicting the reflected amplitude are based on multiple simplifying assumptions that are not matched by most commercial GPR impulse machines. In the first part of this study, we confronted the theoretical curves with numerical finite difference simulations performed with GprMax2D, with both a continuous sine wave and a realistic pulse derived from measurements. In the second part, we performed experiments on two concrete slabs, separated with an air space of variable thickness. The measured amplitude appeared to be different from the predictions, probably due to surface noise.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/86487
Other URL :	http://piers.org/piersproceedings/piers2011MarrakeshProc.php

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