Geoscience Reference
In-Depth Information
2.3 Direct Shear Test
Gray and Ohashi (1983) considered a reinforcement embedded perpendicularly
or at an inclination to the shear zone in a direct shear box (Fig. 8). At distortion,
tensile force is mobilized in the reinforcement, which can be discomposed into
components normal and tangential to the shear plane. The normal component
increases the confining stress on the failure plane, thereby mobilizing additional
shear resistance in the sand whereas the tangential component directly resists
shear. The reinforcement bending stiffness is not considered.
The increase in strength due to reinforcement installed perpendicularly and
at an inclination is expressed in Eqs. (26) and (in a more compact form) (27),
Figure 8
Fiber reinforcement model in direct shear. (From Gray and Ohashi, 1983.)
Search WWH ::
Custom Search