LABORATORY MODELING OF DEFORMATION OF SAMPLES WITH DISCONTINUITY UNDER DIRECT SHEAR IN CONSTANT NORMAL STIFFNESS CONDITIONS
O. M. Usol’tseva, P. A. Tsoi, V. N. Semenov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Прочность, сдвиг, напряжение, деформация, нарушение сплошности, Strength, shear, stress, strain, discontinuity
Abstract
This study presents tests of samples with discontinuity made of artificial geomaterial (concrete-sand mixture) having triangular profile of surface roughness under shear loading with the boundary “constant normal stiffness” condition, with three values of normal compressive load: 0.5, 0.9, and 1.2 MPa. The patterns of deformation were determined at each stage of loading diagrams: linear, nonlinear, peak load and residual strength. The empirical dependences of the ultimate shear stress on normal stress were constructed for different values of roughness.
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