Evaluation of strength characteristics of fissured rock mass by a multi-scale limit load analysis

Jahe Jung, Junji Kato, Kenjiro Terada, Takashi Kyoya

Research output: Contribution to conferencePaperpeer-review

Abstract

The failure strength of rock mass is dominated by mechanical characteristics of rock and geometrical characteristics of joints in the rock mass. Thus, the mechanical characteristics required in a design process for rock mass structures would be the strength of the entire rock mass including joints rather than that of rock material itself although it is in reality impossible to investigate the strength of entire rock mass in site. For this reason we propose a method to evaluate the strength of jointed rock mass considering planes of weakness in terms of a numerical analysis in this study. The proposed method is a multi-scale limit load analysis consisting of two sets of governing equations in macro- and microscopic scales based on a mathematical homogenization method. In macro-microscopic scales, the primal-dual interior point method, which is one of the limit load analyses, is used to obtain the failure load factor of the materials. In addition, the verification of the proposed method is demonstrated by comparison with experiments.

Original languageEnglish
Pages840-846
Number of pages7
Publication statusPublished - 2012 Jan 1
Event7th Asian Rock Mechanics Symposium, ARMS 2012 - Seoul, Korea, Republic of
Duration: 2012 Oct 152012 Oct 19

Other

Other7th Asian Rock Mechanics Symposium, ARMS 2012
CountryKorea, Republic of
CitySeoul
Period12/10/1512/10/19

Keywords

  • Discontinuous rock mass
  • Failure strength
  • Multi-scale analysis
  • Primal-dual rigid plastic FEM

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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