The paper deals with the mechanical behaviour of an unsaturated air-fall volcanic (pyroclastic) soil, originated by the explosive eruptions of theVesuvius volcano in southern Italy. Some experimental laboratory tests are described with special reference to theWater Retention Curve (WRC) and the Critical State Line (CSL); and, a series ofwetting-collapse suction-controlled oedometric tests are illustrated. Then, a Generalized Plasticity constitutive model is calibrated referring both theWRCand CSL, and is used to simulate the experimental results of the wetting-collapse tests. The numerical results match the experimental evidences reasonably well, because the constitutive model properly simulates the suction-related bonding effect among the solid grains.
Experimental investigation and constitutive modelling for an unsaturated pyroclastic soil.
CUOMO, SABATINO;MOSCARIELLO, MARIAGIOVANNA;FORESTA, Vito;
2015-01-01
Abstract
The paper deals with the mechanical behaviour of an unsaturated air-fall volcanic (pyroclastic) soil, originated by the explosive eruptions of theVesuvius volcano in southern Italy. Some experimental laboratory tests are described with special reference to theWater Retention Curve (WRC) and the Critical State Line (CSL); and, a series ofwetting-collapse suction-controlled oedometric tests are illustrated. Then, a Generalized Plasticity constitutive model is calibrated referring both theWRCand CSL, and is used to simulate the experimental results of the wetting-collapse tests. The numerical results match the experimental evidences reasonably well, because the constitutive model properly simulates the suction-related bonding effect among the solid grains.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
