Bearing capacity factor N-c under phi=0 condition for piles in clays

Khatri, Vishwas N and Kumar, Jyant (2009) Bearing capacity factor N-c under phi=0 condition for piles in clays. In: International journal for numerical and analytical methods in geomechanics, 33 (9). pp. 1203-1225.

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Abstract

Bearing capacity factor N-c for axially loaded piles in clays whose cohesion increases linearly with depth has been estimated numerically under undrained (phi=0) condition. The Study follows the lower bound limit analysis in conjunction With finite elements and linear programming. A new formulation is proposed for solving an axisymmetric geotechnical stability problem. The variation of N-c with embedment ratio is obtained for several rates of the increase of soil cohesion with depth; a special case is also examined when the pile base was placed on the stiff clay stratum overlaid by a soft clay layer. It was noticed that the magnitude of N-c reaches almost a constant value for embedment ratio greater than unity. The roughness of the pile base and shaft affects marginally the magnitudes of N-c. The results obtained from the present study are found to compare quite well with the different numerical solutions reported in the literature.

Item Type:	Journal Article
Publication:	International journal for numerical and analytical methods in geomechanics
Publisher:	John wiley
Additional Information:	Copyright for this article belongs John wiley.
Keywords:	axisymmetry; bearing capacity; limit analysis;optimization; pile foundation;plasticity
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	15 Jul 2009 10:28
Last Modified:	19 Sep 2010 05:37
URI:	http://eprints.iisc.ac.in/id/eprint/21474

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