Soil dynamic response has been little investigated under fast loading conditions. Split Hopkinson Pressure Bar method leads to the determination of dynamic behaviour of various materials. A special experimental device called three-dimensional S.H.P.B provides dynamic response of soil specimens in both axial and radial directions (oedometric tests). Comparisons with other loading paths (mean and deviatoric stresses) give usefull elements on granular soil behaviour under high strain rates. The results are also analysed at grain-size scale (grain-size distribution, fracture energy). Experimental results show that 3D-Split Hopkinson Pressure Bar is a promising tool for laboratory dynamic testing on soils.

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