Research Article
May 1968
A Model for the Mechanics of Jointed Rock
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VIEW THE REPLYAuthors: Richard E. Goodman, M.ASCE, Robert L. Taylor, AM.ASCE, and Tor L. BrekkeAuthor Affiliations
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 94, Issue 3
Abstract
The representation of discontinuities in analysis of blocky rock is discussed. A linkage type element is developed for addition of rock joint stiffness to the structural stiffness matrix describing the behavior of a system of rock blocks and joints. Several basic problems of jointed rock are studied. These examples demonstrate the marked influence joints may have on the stress distribution, displacements, and failure pattern of an underground opening or other structures in jointed rock. A new classification of joints is introduced, based on the application of the joint element to finite element analysis of structures in jointed rock. Normal stiffness, tangential stiffness, and shear strength are used as parameters in the classification system. The methods discussed in this paper allow a jointed rock mass to be treated as a system of blocks and links. Just as analysis of a reinforced concrete building requires detailed knowledge of the behavior of concrete alone and steel alone, the joint stiffness approach calls for and uses detailed description of the behavior of rock blocks and rock joints independently.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 94 • Issue 3 • May 1968
Pages: 637 - 659
Copyright
© 1968 American Society of Civil Engineers.
History
Published in print: May 1968
Published online: Feb 12, 2021
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Richard E. Goodman, M.ASCE
Asst. Prof. of Geol. Engrg., Univ. of California, Berkeley, Calif.
Robert L. Taylor, AM.ASCE
Asst. Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
Tor L. Brekke
Hogskolelektor, Geol. Engrg., Technical Univ. of Norway, Trondheim, Norway
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