Failure design of jointed rock structures by means of a homogenization approach Export

@article{citeulike:1389736, abstract = {Conceived as a potential alternative to the methods usually employed for evaluating the stability of jointed rock masses, the homogenization approach developed in this paper stems from the intuitive idea that, from a macroscopic point of view, a rock mass intersected by a regular network of joint surfaces may be perceived as a homogeneous continuum. The failure criterion of such an equivalent medium is theoretically determined from the knowledge of the failure conditions of the individual constituents, namely the intact rock matrix and joint interfaces. Owing to the existence of privileged material directions associated with the joint orientation distribution, this criterion turns out to be of the anisotropic frictional type, as shown by the closed-form expression obtained in the particular case of two mutually orthogonal joint sets. This criterion is then applied to the investigation of two illustrative engineering problems: the calculation of the load-bearing capacity of a shallow foundation on a jointed rock half-space and the stability analysis of an excavation. Both problems are handled by means of the kinematic method of yield design, making use of the previously determined macroscopic failure condition. The upper bound estimates thus derived appear to be significantly better than those obtained from a direct analysis in which the intact rock matrix and joints are considered separately. In spite of some limitations regarding its range of applicability, which are underlined throughout the paper, the homogenization approach may constitute an appropriate general framework for the design of densely jointed rock structures. {\copyright} 1998 John Wiley \& Sons, Ltd.}, address = {Laboratoire de M\'{e}canique des Solides (URA 317 CNRS), ENPC-CERCSO, 6 et 8 avenue Blaise Pascal, Cit\'{e} Descartes Champs-sur-Marne, 77455 Marne-la-Vall\'{e}e Cedex 2, France; Bouygues-TP, Challenger, 1 av. E. Freyssinet, 78 061 St-Quentin-en-Yvelines, France}, author = {Maghous, Samir and de Buhan, Patrick and Bekaert, Arnaud}, citeulike-article-id = {1389736}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/(SICI)1099-1484(199807)3:3%3C207::AID-CFM46%3E3.0.CO;2-X}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/61003292/ABSTRACT}, doi = {10.1002/(SICI)1099-1484(199807)3:3%3C207::AID-CFM46%3E3.0.CO;2-X}, journal = {Mechanics of Cohesive-frictional Materials}, keywords = {jointed-rocks}, number = {3}, pages = {207--228}, posted-at = {2007-06-14 10:54:31}, priority = {2}, title = {Failure design of jointed rock structures by means of a homogenization approach}, url = {http://dx.doi.org/10.1002/(SICI)1099-1484(199807)3:3%3C207::AID-CFM46%3E3.0.CO;2-X}, volume = {3}, year = {1998} }

TY - JOUR ID - citeulike:1389736 L3 - citeulike-article-id:1389736 N2 - Conceived as a potential alternative to the methods usually employed for evaluating the stability of jointed rock masses, the homogenization approach developed in this paper stems from the intuitive idea that, from a macroscopic point of view, a rock mass intersected by a regular network of joint surfaces may be perceived as a homogeneous continuum. The failure criterion of such an equivalent medium is theoretically determined from the knowledge of the failure conditions of the individual constituents, namely the intact rock matrix and joint interfaces. Owing to the existence of privileged material directions associated with the joint orientation distribution, this criterion turns out to be of the anisotropic frictional type, as shown by the closed-form expression obtained in the particular case of two mutually orthogonal joint sets. This criterion is then applied to the investigation of two illustrative engineering problems: the calculation of the load-bearing capacity of a shallow foundation on a jointed rock half-space and the stability analysis of an excavation. Both problems are handled by means of the kinematic method of yield design, making use of the previously determined macroscopic failure condition. The upper bound estimates thus derived appear to be significantly better than those obtained from a direct analysis in which the intact rock matrix and joints are considered separately. In spite of some limitations regarding its range of applicability, which are underlined throughout the paper, the homogenization approach may constitute an appropriate general framework for the design of densely jointed rock structures. © 1998 John Wiley & Sons, Ltd. IS - 3 JF - Mechanics of Cohesive-frictional Materials AD - Laboratoire de Mécanique des Solides (URA 317 CNRS), ENPC-CERCSO, 6 et 8 avenue Blaise Pascal, Cité Descartes Champs-sur-Marne, 77455 Marne-la-Vallée Cedex 2, France; Bouygues-TP, Challenger, 1 av. E. Freyssinet, 78 061 St-Quentin-en-Yvelines, France EP - 228 TI - Failure design of jointed rock structures by means of a homogenization approach VL - 3 SP - 207 KW - jointed-rocks AU - Maghous, Samir AU - de Buhan, Patrick AU - Bekaert, Arnaud PY - 1998/// UR - http://dx.doi.org/10.1002/(SICI)1099-1484(199807)3:3%3C207::AID-CFM46%3E3.0.CO;2-X ER -