Abstract This paper improves the elasto-plastic model with double yield surfaces in the context of the hardening soil model for the simulation of the settlement behavior of high rockfill dams. The stress-dependent stiffness values (E 50 and E oed control the shear hardening and the cap yield surfaces, respectively) are modified to exhibit different degrees of evolution with changes in the stress state. A modification of Rowe’s stress-dilatancy theory is proposed to account for the influence of particle breakage. Good quantitative agreement between simulated and measured stress-strain relationships can be achieved; in particular, the volumetric strain is much improved from the original model. The developed model is applied to predict the settlement of Nam Ngum 2, a 182 m high rockfill dam, during the construction stage, in conjunction with a three-Dimensional (3D) Finite Element (FE) analysis. The findings show that a good agreement between computed settlements and dam field monitoring data can be achieved.


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    Titel :

    A modified elasto-plastic model with double yield surfaces and considering particle breakage for the settlement analysis of high rockfill dams


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    15.06.2016


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






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