Strength of non-persistent rock joints

The present experimental study was conducted to investigate strength-anisotropy and failure modes of closed, persistent and non-persistent rock joints under biaxial loading. Previous investigations concerning the behavior of rock masses were conducted by simulating the rock mass as an assemblage of unit blocks. This arrangement is susceptible to rotation, imperfect contacts, and surface mismatch of the individual elements. In this study a procedure was developed to form closed, persistent and non-persistent joints in the sample, during casting, to represent the in-situ behavior of a rock mass containing joints of a single set. For joints capable of sliding, failure in rock masses with non-persistent joints can either be along the joints or stepping (sliding along joint segment and tension failure between the joint rows). The Mohr-Coulomb shear criterion is suitable for predicting failure along the joints; but failure by stepping needs another approach, which takes into account the failure in tension. The Mohr-Coulomb criterion in conjunction with the proposed expression gives satisfactory agreement with the test results.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Jamil, S. Muhammad

Contributors dc:contributor

• Cording, Edward J.

• Engineering, Civil

Statement dc:rights

• Copyright 1992 Jamil, S. Muhammad

Language dc:language

eng

Identifier

AAI9305566
(UMI)AAI9305566

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/21283