NUMERICAL STUDY OF DEPTH FACTORS FOR UNDRAINED LIMIT LOAD OF STRIP FOOTINGS

  • H. YAHIA-CHERIF Department of Civil and Hydraulic Engineering, University of Biskra
  • A. MABROUKI Department of Civil and Hydraulic Engineering, University of Biskra
  • M. MELLAS Department of Civil and Hydraulic Engineering, University of Biskra
  • D. BENMEDDOUR Department of Civil and Hydraulic Engineering, University of Biskra

Résumé

Current studies of bearing capacity for shallow foundations tend to rely on the hypothesis of an isolated footing lying on the
ground surface. In practice a footing never lies on the ground surface; it is mostly embedded at a depth D below the ground
surface. This paper focuses on a numerical study using the finite-difference code Fast Lagrangian Analysis of Continua
(FLAC),to evaluate the bearing capacity of embedded strip footings. The effect of the embedment is estimated though a depth
factor, defined as a ratio of the bearing capacity of a strip footing at a depth Dto that of a strip footing at the ground surface.
The results presented in this paper show that the size and shape of the shear zone and displacement field defining the undrained
capacity of shallow foundations under centred vertical loading are dependent on embedment ratio

Références

[1] Terzaghi, K. Theoretical soil mechanics. New York:
Wiley; 1943.
[2] Meyerhof, G. G. The ultimate bearing capacity of
foundations. Géotechnique 1951; 1 (2):301–332.
[3] Sokolovskii, V.V. Statics of soil media (translated
from the 1942 Russian edition). London:
Butterworths; 1960.
[4] Hansen J. B. A revised and extended formula for
bearing capacity. Danish Geotech Inst Bull 1970; 28:
5–11.
[5] Michalowski, R.L. An estimate of the influence of soil
weight on bearing capacity using limit analysis. Soils
and Foundations 37(4): 57–64.
[6] Salgado, R., Lyamin, A. V., Sloan, S. W. & Yu, H. S.
Two- and three-dimensional bearing capacity of
foundations in clay. Géotechnique 2004; 54 (5): 297–
306.
[7] Gourvenec, S.M & Mana, D. S. K. Undrained vertical
bearing capacity factors for shallow foundations.
GéotechniqueLetters 2011; 1: 101–108.
[8] Frydman, S. & Burd, H.J. Numerical studies of
bearing capacity factor N
γ
. J. Geotech Geoenviron Eng
ASCE 1997 123(1):20–29.
[9] Loukidis, D., & Salgado, R. Bearing capacity of strip
and circular footings in sand using finite elements.
Computers and Geotechnics 2009; 36(5):871–879.
[10] Mabrouki, A., Benmeddour, D., Frank, R., & Mellas,
M. Numerical study of the bearing capacity for two
interfering strip footings on sands. Computers and
Geotechnics 2010; 37(4):431–439.
[11] Zhang, Y., Bienen, B., Cassidy, M. J., & Gourvenec,
S. Undrained bearing capacity of deeply buried flat
circular footings under general loading. J. Geotech
Geoenviron Eng 2012; 138(3):385–397.
[12] [Skempton, A. W. The bearing capacity of clays. Proc.
BuildingResearch Cong. London 1951; 1:180–189.
[13] Meyerhof, G. G. Some recent research on the bearing
capacity of foundations. Can Geotech J 1963; 1 (1):
16–26.
[14] [14] Edwards, D. H., Zdravkovic, L. & Potts, D. M.
Depth factors for undrained bearing capacity.
Géotechnique 2005; 55(10):755–758.
[15] Gourvenec, S. Effect of embedment on the undrained
capacity of shallow foundations under general loading.
Géotechnique 2008; 58(3):177–185.
[16] Prandtl L. Über die Härte plastischer Körper.
Narchrichten von der Königlichen Gesellschaft der
Wissenschaften, Göttingen, Math.-phys. Klasse; 1920.
p. 74–85.
[17] Salgado, R. The engineering of foundations. McGrawHill; 2008
Comment citer
YAHIA-CHERIF, H. et al. NUMERICAL STUDY OF DEPTH FACTORS FOR UNDRAINED LIMIT LOAD OF STRIP FOOTINGS. Courrier du Savoir, [S.l.], v. 17, mai 2014. ISSN 1112-3338. Disponible à l'adresse : >http://revues.univ-biskra.dz/index.php/cds/article/view/371>. Date de consultation : 05 jui. 2020
Rubrique
Articles