UNIFIED APPROACH TO THE MODELLING OF LIQUEFACTION AND CYCLIC MOBILITY OF SANDS.

The problem of liquefaction of sand under either monotonic or cyclic loading is tackled from the point of view of Continuum Mechanics. It is shown that a suitable constitutive model may explain, in a phenomenological sense, the generation of pore pressure in an undrained test either when the load is monotonically increased to failure or when sand is cyclically sheared at constant stress or strain amplitudes.