REDUCING COMPUTATIONAL EFFORT IN SOLVING GEOMECHANICS PROBLEMS WITH UPPER BOUND FINITE ELEMENTS LIMIT ANALYSIS AND LINEAR OPTIMIZATION

Sahoo, Jagdish Prasad and Kumar, Jyant (2014) REDUCING COMPUTATIONAL EFFORT IN SOLVING GEOMECHANICS PROBLEMS WITH UPPER BOUND FINITE ELEMENTS LIMIT ANALYSIS AND LINEAR OPTIMIZATION. In: INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS, 11 (2, SI).

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Abstract

This paper presents a simple technique for reducing the computational effort while solving any geotechnical stability problem by using the upper bound finite element limit analysis and linear optimization. In the proposed method, the problem domain is discretized into a number of different regions in which a particular order (number of sides) of the polygon is chosen to linearize the Mohr-Coulomb yield criterion. A greater order of the polygon needs to be selected only in that region wherein the rate of the plastic strains becomes higher. The computational effort required to solve the problem with this implementation reduces considerably. By using the proposed method, the bearing capacity has been computed for smooth and rough strip footings and the results are found to be quite satisfactory.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
Publisher:	WORLD SCIENTIFIC PUBL CO PTE LTD
Additional Information:	Copyright for this article belongs to the WORLD SCIENTIFIC PUBL CO PTE LTD, SINGAPORE
Keywords:	Bearing capacity; failure load; finite elements; foundations; limit analysis
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	22 May 2014 06:25
Last Modified:	22 May 2014 11:27
URI:	http://eprints.iisc.ac.in/id/eprint/48985

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