Documents disponibles écrits par cet auteur

Applicability of conventional p-y relations to the analysis of piles in laterally spreading soil / Christopher R. McGann in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 6 (Juin 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 6 (Juin 2011) . - pp. 557-567 Titre : Applicability of conventional p-y relations to the analysis of piles in laterally spreading soil Type de document : texte imprimé Auteurs : Christopher R. McGann, Auteur ; Pedro Arduino, Auteur ; Peter Mackenzie-Helnwein, Auteur Année de publication : 2011 Article en page(s) : pp. 557-567 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Lateral  spreading  Soil-pile  interaction  3D  FEA  p-y  curves  Laterally  loaded  piles Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents a kinematic analysis of a single pile embedded in a laterally spreading layered soil profile and discusses the relevancy of conventional analysis models to this load case. The research encompasses the creation of three-dimensional (3D) finite-element (FE) models using the OpenSees FE analysis platform. These models consider a single pile embedded in a layered soil continuum. Three reinforced concrete pile designs are considered. The piles are modeled using beam-column elements and fiber-section models. The soil continuum is modeled using brick elements and a Drucker-Prager constitutive model. The soil-pile interface is modeled using beam-solid contact elements. The FE models are used to evaluate the response of the soil-pile system to lateral spreading and two alternative lateral load cases. Through the computation of force density-displacement (p-y) curves representative of the soil response, the FE analysis (FEA) results are used to evaluate the adequacy of conventional p-y curve relationships in modeling lateral spreading. It is determined that traditional p-y curves are unsuitable for use in analyses where large pile deformations occur at depth. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i6/p557_s1?isAuthorized=no [article] Applicability of conventional p-y relations to the analysis of piles in laterally spreading soil [texte imprimé] / Christopher R. McGann, Auteur ; Pedro Arduino, Auteur ; Peter Mackenzie-Helnwein, Auteur . - 2011 . - pp. 557-567. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 6 (Juin 2011) . - pp. 557-567 Mots-clés : Lateral  spreading  Soil-pile  interaction  3D  FEA  p-y  curves  Laterally  loaded  piles Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents a kinematic analysis of a single pile embedded in a laterally spreading layered soil profile and discusses the relevancy of conventional analysis models to this load case. The research encompasses the creation of three-dimensional (3D) finite-element (FE) models using the OpenSees FE analysis platform. These models consider a single pile embedded in a layered soil continuum. Three reinforced concrete pile designs are considered. The piles are modeled using beam-column elements and fiber-section models. The soil continuum is modeled using brick elements and a Drucker-Prager constitutive model. The soil-pile interface is modeled using beam-solid contact elements. The FE models are used to evaluate the response of the soil-pile system to lateral spreading and two alternative lateral load cases. Through the computation of force density-displacement (p-y) curves representative of the soil response, the FE analysis (FEA) results are used to evaluate the adequacy of conventional p-y curve relationships in modeling lateral spreading. It is determined that traditional p-y curves are unsuitable for use in analyses where large pile deformations occur at depth. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i6/p557_s1?isAuthorized=no

Simplified procedure to account for a weaker soil layer in lateral load analysis of single piles / Christopher R. McGann in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 9 (Septembre 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 9 (Septembre 2012) . - pp. 1129–1137. Titre : Simplified procedure to account for a weaker soil layer in lateral load analysis of single piles Type de document : texte imprimé Auteurs : Christopher R. McGann, Auteur ; Pedro Arduino, Auteur Année de publication : 2012 Article en page(s) : pp. 1129–1137. Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Lateral  spreading  Soil-pile  interaction  3D  FEA  p-y  curves,  Laterally  loaded  piles  Layered  soil  profiles Résumé : This paper presents a procedure to account for the presence of a weaker layer of soil in a beam on nonlinear Winkler foundation analysis of a laterally loaded pile or drilled shaft. Three-dimensional (3D) finite-element (FE) models, considering a single pile embedded in a soil continuum, are used to compute representative p-y curves for various combinations of soil profile and pile diameter. Comparisons between the p-y curves resulting from homogenous and layered soil profiles, in which a weak soil layer is located between two stronger layers, provide the means to identify reductions in the ultimate lateral resistance and initial stiffness of the p-y curves representing the stronger soil owing to the presence of the weak layer. These reductions are characterized in terms of an exponential decay model. Dimensionless parameters are proposed as a means of implementing appropriate reductions for an arbitrary soil profile and pile diameter. Validation of the reduction procedure is conducted through a comparative study, in which the effects of liquefaction-induced lateral spreading on a pile are analyzed using pseudostatic nonlinear Winkler foundation and 3D FE approaches. Use of the reduction procedure is demonstrated with p-y curves defined by existing methods. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000684 [article] Simplified procedure to account for a weaker soil layer in lateral load analysis of single piles [texte imprimé] / Christopher R. McGann, Auteur ; Pedro Arduino, Auteur . - 2012 . - pp. 1129–1137. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 9 (Septembre 2012) . - pp. 1129–1137. Mots-clés : Lateral  spreading  Soil-pile  interaction  3D  FEA  p-y  curves,  Laterally  loaded  piles  Layered  soil  profiles Résumé : This paper presents a procedure to account for the presence of a weaker layer of soil in a beam on nonlinear Winkler foundation analysis of a laterally loaded pile or drilled shaft. Three-dimensional (3D) finite-element (FE) models, considering a single pile embedded in a soil continuum, are used to compute representative p-y curves for various combinations of soil profile and pile diameter. Comparisons between the p-y curves resulting from homogenous and layered soil profiles, in which a weak soil layer is located between two stronger layers, provide the means to identify reductions in the ultimate lateral resistance and initial stiffness of the p-y curves representing the stronger soil owing to the presence of the weak layer. These reductions are characterized in terms of an exponential decay model. Dimensionless parameters are proposed as a means of implementing appropriate reductions for an arbitrary soil profile and pile diameter. Validation of the reduction procedure is conducted through a comparative study, in which the effects of liquefaction-induced lateral spreading on a pile are analyzed using pseudostatic nonlinear Winkler foundation and 3D FE approaches. Use of the reduction procedure is demonstrated with p-y curves defined by existing methods. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000684