Rate effects on the uplift capacity of skirted foundations on clay

Abstract

Centrifuge tests have been carried out to investigate the uplift resistance of circular and square skirted foundations under increasing displacement rates in lightly overconsolidated Kaolin clay. Uplift loads, displacements and pore pressures at the foundation invert were monitored during testing. Results provide insights into the mechanism of development of suction at the foundation invert and its contribution to the uplift resistance in clay. Backbone curves for both circular and square footings were established, accounting for the soil viscous effect generated at high uplift rate. © 2010 Taylor & Francis Group, London.