The Influence of Microscopic Parameters on Deformation Properties of Rockfıll Materials

C. Ma*, G. Zenz, E. J. Staudacher, J. Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

To analyze the influence of microscopic parameters on deformation properties of rockfill materials in triaxial test simulation with discrete element method (DEM), a control variable method was adopted to determine the influence on stress-strain and volumetric strain curves. In addition, the influence mechanism was explained. Firstly, the characteristics and development trend of triaxial test simulations of rockfill materials were summarized in detail, and it is determined that the contact bond model is the best choice for simulating triaxial tests of rockfill materials. Subsequently, a detailed DEM model of the triaxial test of rockfill materials was established to study the influences and mechanism of friction coefficient, normal and shear stiffness, normal and shear bond strength. Finally, the relationship between deformation properties and broken bond of rockfill materials was investigated. It is considered that the broken bonds of rockfill materials were obviously influenced by microscopic parameters, and the deformation properties were significantly affected by broken bonds. Therefore, in this paper, the influence of microscopic parameters on the deformation properties of rockfill materials was explored, providing a reference for the calibration of microscopic parameters and laying a foundation for the characteristics research of rockfill materials.

Original languageEnglish
Title of host publicationNumerical Analysis of Dams - Proceedings of the 15th ICOLD International Benchmark Workshop, ICOLD-BW 2019
EditorsGabriella Bolzon, Donatella Sterpi, Guido Mazzà, Antonella Frigerio
PublisherSpringer Science and Business Media Deutschland GmbH
Pages821-832
Number of pages12
ISBN (Print)9783030510848
DOIs
Publication statusPublished - 2021
Event15th ICOLD International Benchmark Workshop on Numerical Analysis of Dams, ICOLD-BW 2019 - Milan, Italy
Duration: 9 Sep 201911 Sep 2019

Publication series

NameLecture Notes in Civil Engineering
Volume91
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference15th ICOLD International Benchmark Workshop on Numerical Analysis of Dams, ICOLD-BW 2019
Country/TerritoryItaly
CityMilan
Period9/09/1911/09/19

Keywords

  • Deformation properties
  • Discrete element method
  • Microscopic parameters
  • Rockfill materials
  • Triaxial test

ASJC Scopus subject areas

  • Civil and Structural Engineering

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