Bearing Capacity of Circular Footings on Reinforced Soils

Chakraborty, Debarghya and Kumar, Jyant (2015) Bearing Capacity of Circular Footings on Reinforced Soils. In: INTERNATIONAL JOURNAL OF GEOMECHANICS, 15 (1).

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Abstract

A method is presented for determining the ultimate bearing capacity of a circular footing reinforced with a horizontal circular sheet of reinforcement placed over granular and cohesive-frictional soils. It was assumed that the reinforcement sheet could bear axial tension but not the bending moment. The analysis was performed based on the lower-bound theorem of the limit analysis in combination with finite elements and linear optimization. The present research is an extension of recent work with strip foundations reinforced with different layers of reinforcement. To incorporate the effect of the reinforcement, the efficiency factors eta(gamma) and eta(c), which need to be multiplied by the bearing capacity factors N-gamma and N-c, were established. Results were obtained for different values of the soil internal friction angle (phi). The optimal positions of the reinforcements, which would lead to a maximum improvement in the bearing capacity, were also determined. The variations of the axial tensile force in the reinforcement sheet at different radial distances from the center were also studied. The results of the analysis were compared with those available from literature. (C) 2014 American Society of Civil Engineers.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF GEOMECHANICS
Publisher:	ASCE-AMER SOC CIVIL ENGINEERS
Additional Information:	Copy right for this article belongs to the ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
Keywords:	Circular foundation; Bearing capacity; Failure; Limit analysis; Plasticity; Reinforced soil
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	28 Feb 2015 07:10
Last Modified:	28 Feb 2015 07:10
URI:	http://eprints.iisc.ac.in/id/eprint/50935

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