ABSTRACT
In the analysis of quasi-static collapse of geotechnical structures the static external load is often the single controlling parameter. In case of static liquefaction this load is usually governed by the material weight and a gradually changing geometry. Immediately after reaching the limit resistance the rate of deformation of the failure mechanism becomes dependent on the power supply by both the external load and the change of the potential energy and the mechanical energy dissipation by material friction as simulated by the elasto-visco-plastic model.
In the paper the change of potential energy is shown to govern the type of post-failure behaviour. In the case of collapse of a slope due to static liquefaction the energy transfer in the failing bulk material from potential to kinetic energy is shown to be the major factor leading to a sudden and fast post-failure flow in which the mechanical energy dissipation due to material friction becomes of secondary importance.
