| Titre : | Simplified procedure to account for a weaker soil layer in lateral load analysis of single piles (2012) |
| Auteurs : | Christopher R. McGann, Auteur ; Pedro Arduino, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of geotechnical and geoenvironmental engineering (Vol. 138 N° 9, Septembre 2012) |
| Article en page(s) : | pp. 1129–1137. |
| Note générale : | Géotechnique |
| Langues : | Anglais |
| Tags : | 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 |
