Static liquefaction of very loose sands: Discussion

Discussions 973 The Discusser was very happy to read this paper with very interesting experimental data on the static liquefaction of sands and to have the opportunity to apply the general equations already provided by the principle of natural proportionality to mathematically describe such “anomalous behaviour”. The principle of natural proportionality (Juarez-Badillo 1985) states that natural phenomena are simple and ordered. Other not very obvious characteristics are harmony and symmetry. The general equations relative to stress–strain–time– temperature relationships in geomaterials are limited, so far, to two of the above categories, that is, if stress–strain relations are considered we should keep time and temperature constant. The equations that will be described are for the normal times that are used in the laboratory tests. The strains entering in the equations are the natural strains: the natural longitudinal strain (Hencky) and the natural shear strain (Juarez-Badillo 1974) which is proportional to the deviatoric natural shear strain. These variables entering into the equations are called proper variables. General equations for time effects on soils have already been presented (Juarez-Badillo 1993).