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Determination of nonlinear elastic constants and stress monitoring in concrete by coda waves analysis / Cédric Payan in European journal of environmental and civil engineering, Vol. 15 N° 4 (Avril 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 4 (Avril 2011) . - pp. 519-531 Titre : Determination of nonlinear elastic constants and stress monitoring in concrete by coda waves analysis Type de document : texte imprimé Auteurs : Cédric Payan, Auteur ; Vincent Garnier, Auteur ; Joseph Moysan, Auteur Année de publication : 2011 Article en page(s) : pp. 519-531 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Stress  monitoring  Nonlinear  parameter  Coda  waves  Multiple  scattering Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : For non destructive stress evaluation in prestressed concrete, we describe in this paper a promising ultrasonic method. In “ordinary” isotropic homogeneous materials such as steel, ultrasonic determination of third order elastic constants provides means for stress evaluation since half a century. In case of concrete, example of a class of materials that exhibit strong multiple scattering as well as significant elastic nonlinear response, accurate velocity monitoring is challenging. In this paper, we purpose a novel method originally from geophysics. So called “coda wave interferometry” (CWI), this technique is transposed to concrete. We show that intense scattering can be applied to robustly determine velocity changes and so, nonlinear elastic constants. In addition, we show how this method could be transposed in case of in situ measurements in concrete structures and outline future possible applications. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16042 [article] Determination of nonlinear elastic constants and stress monitoring in concrete by coda waves analysis [texte imprimé] / Cédric Payan, Auteur ; Vincent Garnier, Auteur ; Joseph Moysan, Auteur . - 2011 . - pp. 519-531. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 4 (Avril 2011) . - pp. 519-531 Mots-clés : Stress  monitoring  Nonlinear  parameter  Coda  waves  Multiple  scattering Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : For non destructive stress evaluation in prestressed concrete, we describe in this paper a promising ultrasonic method. In “ordinary” isotropic homogeneous materials such as steel, ultrasonic determination of third order elastic constants provides means for stress evaluation since half a century. In case of concrete, example of a class of materials that exhibit strong multiple scattering as well as significant elastic nonlinear response, accurate velocity monitoring is challenging. In this paper, we purpose a novel method originally from geophysics. So called “coda wave interferometry” (CWI), this technique is transposed to concrete. We show that intense scattering can be applied to robustly determine velocity changes and so, nonlinear elastic constants. In addition, we show how this method could be transposed in case of in situ measurements in concrete structures and outline future possible applications. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16042