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Coupled Bearing Capacity Factor for Strip Foundations on Cohesive-Frictional Soil Slopes under Static and Seismic Conditions

Ganesh, R and Sahoo, JP (2020) Coupled Bearing Capacity Factor for Strip Foundations on Cohesive-Frictional Soil Slopes under Static and Seismic Conditions. In: International Journal of Geomechanics, 20 (11).

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Official URL: https://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0001...


This paper investigates the bearing capacity of strip foundations resting on a cohesive-frictional soil sloping ground under both static and seismic conditions by applying the kinematic theorem of limit analysis. With the consideration of a composite collapse mechanism involving a generalized continually deforming shear zone, analytical expressions are established by incorporating the coupled influence of the soil resistance contributed by the cohesion, angle of internal friction, and self-weight of the soil mass. The loading conditions owing to inertia forces of supporting structures and the changes in the body forces of the supporting soil medium occurred during an earthquake are included in the analysis based on a pseudostatic approach. Rigorous upper-bound solutions are presented in the nondimensional form as charts and tables for the practical range of parameters that are normally encountered in the field. Additionally, by extending the concept of slope stability, a closed-form expression is proposed for computing the limiting values of horizontal seismic acceleration coefficients beyond which the sloping ground becomes unstable. The importance of the consideration of coupling effects of the soil resistance toward evaluating the static and seismic bearing capacity of foundations on the sloping ground over conventional approaches is discussed.

Item Type: Journal Article
Publication: International Journal of Geomechanics
Publisher: American Society of Civil Engineers (ASCE)
Additional Information: The copyright of this article belongs to American Society of Civil Engineers (ASCE)
Keywords: Bearing capacity; Computation theory; Friction; Seismology; Slope stability, Analytical expressions; Angle of internal friction; Bearing capacity factor; Closed-form expression; Conventional approach; Horizontal seismic acceleration; Seismic bearing capacity; Upper bound solution, Soils
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 15 Oct 2020 07:11
Last Modified: 15 Oct 2020 07:11
URI: http://eprints.iisc.ac.in/id/eprint/66668

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