Comparison of failure criteria for jointed rock masses

Latha, Madhavi G and Sitharam, TG (2004) Comparison of failure criteria for jointed rock masses. In: International Journal of Rock Mechanics and Mining Sciences, 41 (Supple). pp. 509-514.

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Abstract

This paper compares two different failure strength criteria for rock; the popular non-linear Hoek and Brown failure criterion and a simple non-linear failure criterion recently proposed by Ramamurthy. Equivalent continuum analyses of jointed rock masses have been carried out using program FLAC with each selected failure criterion. The constitutive behaviour of the rock mass is represented by Mohr-Coulomb model in both cases, which is modified by applying the respective failure criterion using special subroutines. Numerical analysis of triaxial tests on intact and jointed rocks has been carried out first and results have been validated against data from experiments. Further, a case study of an underground power cavern has been analysed using both of these failure criteria and the displacements obtained from the analyses were compared with the field measurements. This study brought out the relative merits and demerits of the two failure criteria when applied to the field problems and confirmed that the simple failure criterion proposed by Ramamurthy could be applied with confidence for the analysis of jointed rock masses.

Item Type:	Journal Article
Publication:	International Journal of Rock Mechanics and Mining Sciences
Publisher:	Elsevier
Additional Information:	This article copyright belongs to Elsevier
Keywords:	Equivalent continuum; failure criterion; joint factor; numerical analysis; rock mass; simulation
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	25 Jun 2007
Last Modified:	19 Sep 2010 04:38
URI:	http://eprints.iisc.ac.in/id/eprint/11230

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