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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
