2020-05-25T13:31:41Z
http://oa.upm.es/cgi/oai2
oai:oa.upm.es:36071
2015-07-06T17:13:24Z
7374617475733D707562
7375626A656374733D636F6E737472756363696F6E
7375626A656374733D6D6563616E696361
747970653D61727469636C65
Micromechanical basis for shear strength of rock discontinuities
Serrano Gonzalez, Alcibiades
Olalla Marañón, Claudio
Galindo Aires, Rubén Ángel
Civil Engineering and Construction
Mechanics
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
E.T.S.I. Caminos, Canales y Puertos (UPM)
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
2014-09
info:eu-repo/semantics/article
Article
International Journal of Rock Mechanics and Mining Sciences, ISSN 1365-1609, 2014-09, Vol. 70
PeerReviewed
application/pdf
eng
http://www.sciencedirect.com/science/article/pii/S1365160914001002#
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijrmms.2014.02.021
http://oa.upm.es/36071/