Ultimate bearing capacity of strip and circular foundations using power type yield criterion using the method of stress characteristics

Ganesh, R and Kumar, J (2021) Ultimate bearing capacity of strip and circular foundations using power type yield criterion using the method of stress characteristics. In: Computers and Geotechnics, 133 .

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Abstract

For determining the bearing capacity of foundations, the existing investigations have been mainly performed by using a linear yield criterion in shear stress (τ)-normal stress (σn) domain, for instance, the Mohr-Coulomb (MC) and Tresca yield criteria. However, the yield criteria for most granular soils are generally nonlinear with continuously increasing friction angle at decreasing stress level. In the present research, the method of stress characteristics has been employed to compute the ultimate bearing capacity of circular and strip foundations considering a power type (PT) nonlinear yield criterion which depends on three material parameters rather than two in the MC yield criterion. Rigorous solutions have been generated for both rough and smooth footing bases and the results have been expressed in terms of the variation of the bearing capacity factor Nσ with the changes in different material parameters and the overburden pressure. The slip line patterns and the variation of the vertical normal pressure below the footing base have also been examined. Further, the effectiveness of the PT nonlinear yield criterion in determining the bearing capacity of foundations has been discussed. The solutions obtained have been found to compare well with different computational and experimental results reported in literature.

Item Type:	Journal Article
Publication:	Computers and Geotechnics
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Bearing capacity; Foundations; Shear stress, Bearing capacity factor; Circular foundations; Linear yield criterion; Material parameter; Overburden pressures; Rigorous solution; Stress characteristics; Ultimate bearing capacity, Yield stress, bearing capacity; Coulomb criterion; footing; Mohr theory; nonlinearity; overburden; plasticity; stress analysis
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	16 Feb 2023 10:17
Last Modified:	16 Feb 2023 10:17
URI:	https://eprints.iisc.ac.in/id/eprint/80517

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