The localization of strains is considered here with reference to the numerical analysis of the stability of a shallow tunnel. A finite element approach is adopted to this purpose that takes into account both "structural" and "constitutive" aspects of the phenomenon. The first aspect is introduced through a criterion for detecting the onset of localization, the second one by a procedure which governs the subsequent progressive loss of the mechanical resistance with increasing shear deformation. The numerical model is applied to the simulation of a series of plane strain laboratory tests on the small scale model of a shallow tunnel. By comparing ex- perimental and numerical results some conclusions are drawn on the effectiveness of the proposed approach.

Numerical analysis of laboratory tests on a model tunnel

STERPI, DONATELLA VALERIA;
1997-01-01

Abstract

The localization of strains is considered here with reference to the numerical analysis of the stability of a shallow tunnel. A finite element approach is adopted to this purpose that takes into account both "structural" and "constitutive" aspects of the phenomenon. The first aspect is introduced through a criterion for detecting the onset of localization, the second one by a procedure which governs the subsequent progressive loss of the mechanical resistance with increasing shear deformation. The numerical model is applied to the simulation of a series of plane strain laboratory tests on the small scale model of a shallow tunnel. By comparing ex- perimental and numerical results some conclusions are drawn on the effectiveness of the proposed approach.
1997
Deformation and progressive failure in geomechanics
0-08-042838-X
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/501452
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