Micromechanical basis for shear strength of rock discontinuities

Serrano Gonzalez, Alcibiades and Olalla Marañón, Claudio and Galindo Aires, Rubén Ángel (2014). Micromechanical basis for shear strength of rock discontinuities. "International Journal of Rock Mechanics and Mining Sciences", v. 70 ; pp. 33-46. ISSN 1365-1609. https://doi.org/10.1016/j.ijrmms.2014.02.021.

Description

Title: Micromechanical basis for shear strength of rock discontinuities
Author/s:
  • Serrano Gonzalez, Alcibiades
  • Olalla Marañón, Claudio
  • Galindo Aires, Rubén Ángel
Item Type: Article
Título de Revista/Publicación: International Journal of Rock Mechanics and Mining Sciences
Date: September 2014
ISSN: 1365-1609
Volume: 70
Subjects:
Freetext Keywords: Rock joint; Roughness; Shear strength; Theoretical model; Dilatancy
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería y Morfología del Terreno
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The theoretical basis for evaluating shear strength in rock joints is presented and used to derive an equation that governs the relationship between tangential and normal stress on the joint during situations of slippage between the joint faces. The dependent variables include geometric dilatancy, the instantaneous friction angle, and a parameter that considers joint surface roughness. The effect roughness is studied, and the aforementioned formula is used to analyse joints under different conditions. A mathematical expression is deduced that explains Barton's value for the joint roughness coefficient (JRC) according to the roughness geometry. In particular, when the Hoek and Brown failure criterion is used for a rock in the contact with the surface roughness plane, it is possible to determine the shear strength of the joint as a function of the relationship between the uniaxial compressive strength of the wall with the normal stress acting on the wall. Finally, theoretical results obtained for the geometry of a three-dimensional joint are compared with those of the Barton's formulation

More information

Item ID: 36071
DC Identifier: http://oa.upm.es/36071/
OAI Identifier: oai:oa.upm.es:36071
DOI: 10.1016/j.ijrmms.2014.02.021
Official URL: http://www.sciencedirect.com/science/article/pii/S1365160914001002#
Deposited by: Memoria Investigacion
Deposited on: 06 Jul 2015 17:13
Last Modified: 06 Jul 2015 17:13
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