Strength evaluation of discontinuous rock mass by multi-scale limit load analysis

J. Jung, J. Kato, K. Terada, T. Kyoya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A method of multi-scale limit load analysis to predict strength of discontinuous rock mass is proposed. The rock mass is regarded as a body that involves microstructures comprised of rock material and cracks and its mechanical behavior is treated rigorously in two sets of governing equations in macro- and microscopic scales. The macroscopic problem describes the averaged mechanical behavior of the whole body, while solutions of the microscopic problem gives a nonlinear relation between the averaged macroscopic stress and strain, which is strongly affected by the complicated microstructure. In other words, the microscopic problem plays a role of nonlinear constitutive law. In this study, a frictional contact model of a single crack is used in the microstructure. Then a method utilizing the localization process for evaluating the strength characteristics of the macro-body is presented. Several numerical examples are shown to validate the proposed method and to demonstrate its potential usefulness in the field of rock mechanics and rock engineering.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
Pages663-666
Number of pages4
Publication statusPublished - 2012 Feb 13
Event12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011 - Beijing, China
Duration: 2011 Oct 182011 Oct 21

Publication series

NameHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics

Other

Other12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011
CountryChina
CityBeijing
Period11/10/1811/10/21

Keywords

  • Numerical modeling
  • Rock mass

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology

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