Documents disponibles écrits par cet auteur

Estimation of soil permeability using an acoustic technique / Chung R. Song in Journal of geotechnical and geoenvironmental engineering, Vol. 134 n°12 (Décembre 2008) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°12 (Décembre 2008) . - pp. 1829–1832 Titre : Estimation of soil permeability using an acoustic technique Type de document : texte imprimé Auteurs : Chung R. Song, Auteur ; Jinwon Kim, Auteur ; A. H.-D. Cheng, Auteur Année de publication : 2009 Article en page(s) : pp. 1829–1832 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Estimation  Acoustic  techniques  Soil  permeability  Saturated  soils Résumé : A new method of estimating the permeability of soils using an acoustic technique is proposed in this technical note. Biot’s coupled theory of mixtures from the mid-1950s, which addresses the relationship between the permeability of saturated soils and the characteristic frequency of elastic waves, is used. The characteristic frequency is determined from the attenuation versus frequency curves obtained by acoustic sweep tests. This study presents the experimental technique for measuring the characteristic frequency of soils and calculation procedure for estimating the permeability of sandy soils. This technical note holds discussion for silty or clayey soils. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A12%281 [...] [article] Estimation of soil permeability using an acoustic technique [texte imprimé] / Chung R. Song, Auteur ; Jinwon Kim, Auteur ; A. H.-D. Cheng, Auteur . - 2009 . - pp. 1829–1832. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°12 (Décembre 2008) . - pp. 1829–1832 Mots-clés : Estimation  Acoustic  techniques  Soil  permeability  Saturated  soils Résumé : A new method of estimating the permeability of soils using an acoustic technique is proposed in this technical note. Biot’s coupled theory of mixtures from the mid-1950s, which addresses the relationship between the permeability of saturated soils and the characteristic frequency of elastic waves, is used. The characteristic frequency is determined from the attenuation versus frequency curves obtained by acoustic sweep tests. This study presents the experimental technique for measuring the characteristic frequency of soils and calculation procedure for estimating the permeability of sandy soils. This technical note holds discussion for silty or clayey soils. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A12%281 [...]

Nanoparticle reinforced polymer for blast protection of unreinforced masonry wall / M. Irshidat in Journal of structural engineering, Vol. 137 N° 10 (Octobre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1193-1204 Titre : Nanoparticle reinforced polymer for blast protection of unreinforced masonry wall : laboratory blast load simulation and design models Type de document : texte imprimé Auteurs : M. Irshidat, Auteur ; A. Al-Ostaz, Auteur ; A. H.-D. Cheng, Auteur Année de publication : 2012 Article en page(s) : pp. 1193-1204 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Masonry  walls  Blast  loading  Nano  enhancement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper investigates the performance of a new generation of nanoparticle-reinforced polymeric materials as an alternative to fiber-reinforced polymer for the protection of masonry structures against blast loads. The nanoparticles used in this study include exfoliated graphene nano platelets (XGnP) and polyhedral oligomeric silsesquioxane (POSS). The polymer is polyurea. A one-quarter scale physical model of unreinforced masonry walls, spray coated with the nanoparticle-reinforced polymers, are subjected to blast load in the Engineer Research and Development Center Blast Load Simulator facility. POSS-reinforced polyurea is observed to significantly enhance the performance of masonry walls sustaining blast loads, whereas XGnP reinforcement has only marginal improvement. To build a numerical simulation and engineering design capability, computer models using ANSYS AUTODYN and simplified analytical models are constructed. These models fairly accurately predict the observed laboratory tests. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1193_s1?isAuthorized=no [article] Nanoparticle reinforced polymer for blast protection of unreinforced masonry wall : laboratory blast load simulation and design models [texte imprimé] / M. Irshidat, Auteur ; A. Al-Ostaz, Auteur ; A. H.-D. Cheng, Auteur . - 2012 . - pp. 1193-1204. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1193-1204 Mots-clés : Masonry  walls  Blast  loading  Nano  enhancement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper investigates the performance of a new generation of nanoparticle-reinforced polymeric materials as an alternative to fiber-reinforced polymer for the protection of masonry structures against blast loads. The nanoparticles used in this study include exfoliated graphene nano platelets (XGnP) and polyhedral oligomeric silsesquioxane (POSS). The polymer is polyurea. A one-quarter scale physical model of unreinforced masonry walls, spray coated with the nanoparticle-reinforced polymers, are subjected to blast load in the Engineer Research and Development Center Blast Load Simulator facility. POSS-reinforced polyurea is observed to significantly enhance the performance of masonry walls sustaining blast loads, whereas XGnP reinforcement has only marginal improvement. To build a numerical simulation and engineering design capability, computer models using ANSYS AUTODYN and simplified analytical models are constructed. These models fairly accurately predict the observed laboratory tests. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1193_s1?isAuthorized=no