|
Titre :
|
Effect of relative density and stress level on the bearing capacity of footings on sand (2011)
|
|
Auteurs :
|
D. Loukidis, Auteur ;
R. Salgado, Auteur
|
|
Type de document :
|
Article : texte imprimé
|
|
Dans :
|
Géotechnique (Vol. 61 N° 2, Fevrier 2011)
|
|
Article en page(s) :
|
pp. 107–119
|
|
Note générale :
|
Génie Civil
|
|
Langues :
|
Anglais
|
|
Index. décimale :
|
624 (Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes)
|
|
Tags :
|
Sands Bearing capacity Anisotropy Numerical modelling Plasticity Footings/foundations
|
|
Résumé :
|
The design of shallow foundations relies on bearing capacity values calculated using empirical procedures that are based in part on solutions obtained using the method of characteristics, which assumes a soil that is perfectly plastic following an associated flow rule. In this paper the problem of strip and circular footings resting on the surface of a sand layer is analysed using the finite-element method. Analyses are performed using a two-surface plasticity constitutive model that realistically captures the aspects of the mechanical response of sands that are relevant to the bearing capacity problem. In particular, the model accounts for non-associated flow, strain-softening, and both stress-induced and inherent anisotropy. Based on the results of the analyses, the paper examines the validity of the bearing capacity factors N γ and shape factors s γ used in practice. A relationship for determining appropriate values of friction angle for use in bearing capacity calculations is also proposed.
|
|
DEWEY :
|
624.15
|
|
ISSN :
|
0016-8505
|
|
En ligne :
|
http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.p.150.3771
|
