Bearing capacity of embedded foundations using quasi-kinematic limit analysis

Mohapatra, Debasis and Kumar, Jyant (2020) Bearing capacity of embedded foundations using quasi-kinematic limit analysis. In: COMPUTERS AND GEOTECHNICS, 117 .

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Abstract

Bearing capacity of rectangular foundations, with varying aspect ratios (1 <= L/B <= 5) and embedded at shallow to medium depths (D/B <= 5), has been evaluated by using the three-dimensional cell-based smoothed finite elements quasi-kinematic limit analysis. The results have also been obtained for circular and strip foundations by performing exclusively the axisymmetric and plane strain analyses. The associated optimization problem has been solved by employing the semidefinite programming (SDP). Shape factors (s(c), s(q) and s(gamma)) and depth factors (d(c), d(q) and d(gamma)) are given as a function of soil internal friction angle (phi). The shape factors have been expressed as a function of L/B, on the other hand, the depth factors have been given as a function of D/B and L/B. A thorough comparison of the results has been made with the different solutions available in literature. The variations of (i) power dissipation function, (ii) maximum plastic shear strain rates, and (iii) the nodal velocities patterns, have also been examined to interpret the failure mechanism.

Item Type:	Journal Article
Publication:	COMPUTERS AND GEOTECHNICS
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright of this article belongs to ELSEVIER SCI LTD
Keywords:	Limit analysis; Failure; Foundations; Plasticity; Semidefinite programming
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	03 Dec 2019 09:31
Last Modified:	03 Dec 2019 09:31
URI:	http://eprints.iisc.ac.in/id/eprint/63995

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