THE KINEMATIC AND INERTIAL SOIL-PILE INTERACTIONS: CENTRIFUGE MODELLING
Résumé
Piles supporting superstructures undergo with the soil two interactions during an earthquake: the kinematic interaction and the inertial interaction. The kinematic soil-pile interaction is the pile loading by the soil displacement produced by the seismic waves propagating. Inertial superstructure-pile-soil interaction results from forces due to the superstructure actuation by the kinematic interaction. These two interactions are superimposed in seismic events and there independent study is therefore difficult, due to the nonlinearity of the soil behaviour. This communication presents an initial set of seismic and impact modelling on soil-pile-superstructure performed in the LCPC's geotechnical centrifuge. It is showed that this modelling approach can contribute to analyse separately the kinematic and the inertial interaction that are non-separate in a simple seism experiment, through seismic tests and impact tests carried out on pile and pile-structure systems embedded in dry sand deposits.
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