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Elasto-plastic analysis of jointed rocks using discrete continuum and equivalent continuum approaches

Latha, Gali Madhavi and Garaga, Arunakumari (2012) Elasto-plastic analysis of jointed rocks using discrete continuum and equivalent continuum approaches. In: INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 53 . pp. 56-63.

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Official URL: http://dx.doi.org/10.1016/j.ijrmms.2012.03.013

Abstract

Results from elasto-plastic numerical simulations of jointed rocks using both the equivalent continuum and discrete continuum approaches are presented, and are compared with experimental measurements. Initially triaxial compression tests on different types of rocks with wide variation in the uniaxial compressive strength are simulated using both the approaches and the results are compared. The applicability and relative merits and limitations of both the approaches for the simulation of jointed rocks are discussed. It is observed that both the approaches are reasonably good in predicting the real response. However, the equivalent continuum approach has predicted somewhat higher stiffness values at low strains. Considering the modelling effort involved in case of discrete continuum approach, for problems with complex geometry, it is suggested that a proper equivalent continuum model can be used, without compromising much on the accuracy of the results. Then the numerical analysis of a tunnel in Japan is taken up using the continuum approach. The deformations predicted are compared well against the field measurements and the predictions from discontinuum analysis. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier Ltd
Keywords: Jointed rock mass;Numerical simulations;Elasto-plastic analysis;Discrete continuum model;Equivalent-continuum model
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 16 Jul 2012 10:17
Last Modified: 16 Jul 2012 10:19
URI: http://eprints.iisc.ernet.in/id/eprint/44821

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