MODELLING THE DISINTEGRATION OF WEATHERED AND PARTLY SATURATED GRAINS OF ROCKFILL MATERIAL

摘要

The focus of this paper is on modelling the mechanical behaviour of weathered and partly saturated grains of rockfill material using a hypoplastic constitutive model based on the current void ratio, the effective stress, a moisture dependent granular hardness and the rate of deformation. Creep and stress relaxation during the time-dependent process of degradation of the granular hardness are also taken into account. The calibration of the model is performed for weathered broken granite and the deformation behaviour of an artificial rockfill dam is numerically investigated.