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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 22
Edited by: M. Papadrakakis and B.H.V. Topping
Paper IV.4

Numerical Analysis of Discontinuities in Geomechanics

M.H.F. Melao Barros and M. Eugenia Rocha

Department of Civil Engineering, Faculty of Sciences and Technology, Coimbra, Portugal

Full Bibliographic Reference for this paper
M.H.F. Melao Barros, M. Eugenia Rocha, "Numerical Analysis of Discontinuities in Geomechanics", in M. Papadrakakis, B.H.V. Topping, (Editors), "Advances in Finite Element Techniques", Civil-Comp Press, Edinburgh, UK, pp 145-149, 1994. doi:10.4203/ccp.22.4.4
A contact element allowing the analysis by the Finite Element Method of problems such as the planes of weakness in a rock mass, in construction joints of concrete dams, or in the interface between soil and structures, is presented. The model includes nonlinear behaviour of the joint, with a plasticity law to simulate dilatancy, joint closure or failure by tensile stresses and shear resistance due to friction between the rough surfaces of the joint. The method is implemented into a finite element code and can be applied in practical examples such as the determination of contact normal and tangential stresses between the two faces of a fault, the stability of a rockfill gravity dam with joints between the core and the rockfill slopes.

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