# Bearing capacity factor $N_{\gamma}$ for ring footings using the method of characteristics

Kumar, Jyant and Ghosh, Priyanka (2005) Bearing capacity factor $N_{\gamma}$ for ring footings using the method of characteristics. In: Canadian Geotechnical Journal, 42 (5). pp. 1474-1484.

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## Abstract

The bearing capacity factor $N_{\gamma}$ was determined for both smooth and rough ring footings using the method of stress characteristics. The analysis was based on the assumption that for a rough footing the friction angle (\delta) between the footing base and underlying cohesionless material increases gradually from zero along the axis of symmetry to \phi along the outer edge of the footing. The value of $N_{\gamma}$ was found to decrease significantly with an increase in $r_{i}/r_{o}$, where $r_{i}$ and $r_{o}$ are the inner and outer radii of the ring,respectively. For larger values of \phi, the magnitude of $N_{\gamma}$ for a rough footing was seen to be significantly higher than that for a smooth footing. The obtained results were compared with those available in the literature.

Item Type: Journal Article Copyright for this article belongs to NATL Research Council Canada. bearing capacity;failure;foundations;method of characteristics;plasticity Division of Mechanical Sciences > Civil Engineering 24 Nov 2005 27 Aug 2008 11:34 http://eprints.iisc.ernet.in/id/eprint/4127