切り欠きを有する緩い砂供試体の変形・強度特性について

抄録

The object of this study is to investigate the notch and the deformation rate effects on theload-displacement relation experimentally and numerically.Especially the comparatively highpermeable loose sand is adopted.Triaxial tests are carried out with perfect and imperfectspecimens to examine the shear modulus, the peak and the residual strength, and their relationswith the deformation rate and its mode.The finite element analysis of soil-water coupledproblem is also performed to consider the notch effect of geometrical boundary condition inthe frame work of the finite deformation theory.The numerical results are confirmed with theexperimental facts as follows.The notch makes the peak strength reduced and promotes themore wealthy compressibility in the pre-peak deformation process.At the post-peak state, theload reduces depending upon the specimen's shape that is governed by the deformation rate.