The variation of N-gamma with footing roughness using the method of characteristics

Kumar, Jyant (2009) The variation of N-gamma with footing roughness using the method of characteristics. In: International Journal for Numerical and Analytical Methods in Geomechanics, 33 (2). pp. 275-284.

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Abstract

By using the method of characteristics, the effect of footing-soil interface friction angle (delta) on the bearing capacity factor N-gamma was computed for a strip footing. The analysis was performed by employing a curved trapped wedge under the footing base; this wedge joins the footing base at a distance B-t from the footing edge. For a given footing width (B), the value of B-t increases continuously with a decrease in delta. For delta = 0, no trapped wedge exists below the footing base, that is, B-t/B = 0.5. On the contrary, with delta = phi, the point of emergence of the trapped wedge approaches toward the footing edge with an increase in phi. The magnitude of N-gamma increases substantially with an increase in delta/phi. The maximum depth of the plastic zone becomes higher for greater values of delta/phi. The results from the present analysis were found to compare well with those reported in the literature.

Item Type:	Journal Article
Publication:	International Journal for Numerical and Analytical Methods in Geomechanics
Publisher:	John Wiley & Sons
Additional Information:	Copyright of this article belongs to John Wiley & Sons.
Keywords:	bearing capacity;failure;foundations;numerical modeling and analysis;plasticity.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	24 Mar 2009 09:38
Last Modified:	19 Sep 2010 05:27
URI:	http://eprints.iisc.ac.in/id/eprint/19196

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