Practical nonlinear constitutive model for rockfill materials with application to rockfill dam

Si hong Liu, Yi Sun, Chao min Shen, Zhen Yu Yin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

In this paper, a nonlinear constitutive model for rockfill materials is proposed to account for the coupling influence of the mean effective stress p and the deviatoric stress q on the deformation of rockfill materials. In the model, the stress-dilatancy relationship derived from the microstructural changes of granular materials is adopted, and the strength nonlinearity of rockfill materials is considered by using a logarithmic relationship between the peak friction angle and the mean effective stress. The SMP criterion is incorporated into the model to consider the influence of the intermediate principal stress. The good performance of the proposed model is demonstrated through modelling triaxial tests on rockfill materials from a rockfill dam. In addition, the FEM simulated deformation of a real CFRD using the proposed model agrees well with the monitored data.

Original languageEnglish
Article number103383
JournalComputers and Geotechnics
Volume119
DOIs
Publication statusPublished - Mar 2020

Keywords

  • Dilatancy
  • Intermediate principal stress
  • Nonlinear constitutive model
  • Rockfill materials

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

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