ABSTRACT
The dynamic behaviour of a soil depends of its inherent properties, namely stiffness, density, stress state, anisotropy, structure, among others. In this research, a detailed three-dimensional numerical model was implemented in the finite differences program FLAC3D, in order to simulate the dynamic behaviour of a soil in true triaxial conditions. A series of true triaxial tests with shear wave measurements was modelled, which required the implementation of bender elements in the model. The influence of the cubical geometry and boundary conditions (reflective and absorbent) was investigated, by means of parametric and sensitivity studies, considering the linear elastic constitutive model. After these studies, a comparison was established, based on the extensive laboratory data provided by Ferreira (2009) on reconstituted specimens of residual soil from Porto granite. In the present paper, only test results on dry (w ↻ 0%) specimens will be used and discussed for the purpose of comparison.
