2026-04-18T04:16:56Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4427522026-03-27T11:03:51Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Carluccio, Gaia di author Avilés Murcia, Luis Ángel author Pinyol Puigmartí, Núria Mercè author Alonso Pérez de Agreda, Eduardo author 2025-09-24 The paper presents the modelling of unsaturated soils with the material point method (MPM), including the effect of wetting leading to the loss of strength and the volumetric collapse. The elastoplastic Clay and Sand Model (CASM) extended to unsaturated conditions, formulated in terms of Bishop's stress and suction, has been implemented in an MPM-based computational tool, in which gas density and pressure is assumed constant. The implementation of infiltration and seepage boundary conditions, required for wetting problems, are discussed and validated. A centrifuge experiment involving the construction, wetting, failure and post-failure of a slope is interpreted and reproduced by the MPM-based tool. Centrifuge data captured by video images, first analysed by particle image velocity (PIV) and then improved by the PIV-numerical particle (NP) procedure, provides the motion and deformation of the entire experiment and is compared with calculations. The measured response of a 1D column of the model slope during the first stages of the test provided a first approximation of the constitutive parameters. The finally adopted set of model parameters led to a proper simulation of the entire response of the slope during wetting pre- and post-failure stage. This study was supported by the project PDC2022-133222-I00 and PID2022-141429OB-I00 funded by MCIN/AEI/10.13039/501100011033/FEDER and Union Europea NextGenerationEU/PRTR. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes numèrics Centrifuge experiment Failure Large displacements Material point method Unsaturated soils Wetting collapse Modelling wetting collapse, failure and deposition of an unsaturated slope with material point method