Bearing Capacity of Embedded Strip Footings on Cohesionless Soil Under Vertical and Horizontal Loads

In the last decades a few attention was given to the evaluation of the bearing capacity of embedded footing under inclined loads on a frictional soil. 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 footing on a frictional soil. The soil is modeled by an elasto-plastic model with a Mohr–Coulomb yield criterion and associative flow rule; the effect of non-associativity of the soil on the bearing capacity is also investigated. 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 D to that of a strip footing at the ground surface. The inclination effect is estimated by inclination factors, defined as the ratio of the limit vertical load for a footing under inclined loading to that of the vertically loaded footing. Both swipe and probe analyses were carried out to identify the vertical force–horizontal force (V–H) failure envelope. The results have been compared with those available in the literature.

[1]  Hans L. Erickson,et al.  Bearing Capacity of Circular Footings , 2002 .

[2]  Mark Randolph,et al.  THE EFFECT OF EMBEDMENT DEPTH ON THE UNDRAINED RESPONSE OF SKIRTED FOUNDATIONS TO COMBINED LOADING , 1999 .

[3]  Aleksandar S. Vesic,et al.  Analysis of Ultimate Loads of Shallow Foundations , 1973 .

[4]  Rodrigo Salgado,et al.  Two- and three-dimensional bearing capacity of footings in sand , 2007 .

[5]  L. Prandtl,et al.  Über die Härte plastischer Körper , 1920 .

[6]  A. S. Kumbhojkar,et al.  Numerical Evaluation of Terzaghi's Nγ , 1993 .

[7]  Wai-Fah Chen.  Limit Analysis and Soil Plasticity , 1975 .

[8]  Harvey J. Burd,et al.  Numerical studies of bearing-capacity factor Nγ , 1997 .

[9]  A.P.S. Selvadurai,et al.  Influence of Nonassociativity on the Bearing Capacity of a Strip Footing , 2001 .

[10]  Guido Gottardi,et al.  Plastic response of circular footings on sand under general planar loading , 1999 .

[11]  George Geoffrey Meyerhof,et al.  Some recent research on the bearing capacity of foundations , 1963 .

[12]  Mark Randolph,et al.  Combined loading of skirted foundations , 1998 .

[13]  Guido Gottardi,et al.  ON THE BEARING CAPACITY OF SURFACE FOOTINGS ON SAND UNDER GENERAL PLANAR LOADS , 1993 .

[14]  Scott W. Sloan,et al.  Numerical limit analysis solutions for the bearing capacity factor Nγ , 2005 .

[15]  Rodrigo Salgado,et al.  Bearing capacity of strip footings on purely frictional soil under eccentric and inclined loads , 2008 .

[16]  S. Gourvenec.  Effect of embedment on the undrained capacity of shallow foundations under general loading , 2008 .

[17]  Djamel Benmeddour,et al.  Numerical study of the bearing capacity for two interfering strip footings on sands , 2010 .

[18]  Guy T. Houlsby,et al.  Vertical bearing capacity factors for conical footings on sand , 2002 .

[19]  Abdul-Hamid Soubra,et al.  Upper-Bound Solutions for Bearing Capacity of Foundations , 1999 .

[20]  Finian Seng Chin Tan.  Centrifuge and theoretical modelling of conical footings on sand , 1990 .

[21]  K. Terzaghi.  Theoretical Soil Mechanics , 1943 .

[22]  Wai-Fah Chen,et al.  Bearing Capacity of Shallow Foundations , 1991 .

[23]  Malcolm D. Bolton,et al.  Vertical bearing capacity factors for circular and strip footings on Mohr–Coulomb soil , 1993 .

[24]  Guido Gottardi,et al.  THE DISPLACEMENT OF A MODEL RIGID SURFACE FOOTING ON DENSE SAND UNDER GENERAL PLANAR LOADING , 1995 .

[25]  Kazuo Tani,et al.  BEARING CAPACITY OF CIRCULAR FOUNDATIONS ON SOFT CLAY OF STRENGTH INCREASING WITH DEPTH , 1995 .

[26]  J. B. Hansen,et al.  A general formula for bearing capacity , 1961 .

[27]  Susan Gourvenec,et al.  Effect of strength non-homogeneity on the shape of failure envelopes for combined loading of strip and circular foundations on clay , 2003 .

[28]  J. Brinch Hansen.  AKADEMIET FOR DE TEKNISKE VIDENSKABER , 2008 .

[29]  G. G. Meyerhof.  The Ultimate Bearing Capacity of Foudations , 1951 .

[30]  Rodrigo Salgado,et al.  Bearing capacity of strip and circular footings in sand using finite elements , 2009 .

[31]  Radoslaw L. Michalowski,et al.  AN ESTIMATE OF THE INFLUENCE OF SOIL WEIGHT ON BEARING CAPACITY USING LIMIT ANALYSIS , 1997 .