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Volume 41 Issue S2
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JIANG Ming-jing, ZHANG Hao-ze, LI Tao, ZHANG Peng. DEM analysis of isotropic compression tests on remolded and structured unsaturated loess[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 121-124. DOI: 10.11779/CJGE2019S2031
Citation: JIANG Ming-jing, ZHANG Hao-ze, LI Tao, ZHANG Peng. DEM analysis of isotropic compression tests on remolded and structured unsaturated loess[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 121-124. DOI: 10.11779/CJGE2019S2031
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DEM analysis of isotropic compression tests on remolded and structured unsaturated loess

  • 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
    2. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
    3. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
    4. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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  • Received Date: April 29, 2019
  • Published Date: July 19, 2019
    Graphical Abstract
    • Abstract
  • The macroscopic and microscopic mechanical responses of remolded and structured unsaturated loess are investigated under isotropic compression using the distinct element method (DEM). A three-dimensional (3D) cementation contact model developed for unsaturated structural loess is employed in the DEM with its parameters calibrated from the true triaxial tests on Chinese loess. After preparing the numerical unsaturated remolded and structured loess specimens, the isotropic compression tests are carried out. The DEM results show that the simulation can reproduce qualitatively the main mechanical behavior of the loess. The void ratio of unsaturated loess decreases slowly at first with the mean stress, and then begins to transit to a rapid reduction near the yield stress. When the mean stress of a certain threshold is reached, the cementing contact begins to break. There is a well correspondence between the threshold that a lot of contacts break down and the yield stress of the structure on the compression curve.
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    • References (9)
  • [1]
    LI T L, WANG P, XI Y.The mechanisms for initiation and motion of Chinese loess landslides[M]. Berlin: Springer Berlin Heidelberg, 2013: 105-122.
    [2]
    CUNDALL P A, STRACK O D L. A discrete numerical model for granular assemblies[J]. Géotechnique, 1979, 29(1): 47-65.
    [3]
    JIANG M J, LI T, HU H J, et al.DEM analyses of one-dimensional compression and collapse behaviour of unsaturated structural loess[J]. Computers and Geotechnics, 2014, 60: 47-60.
    [4]
    李涛. 非饱和结构性黄土三维离散元模拟与本构模型研究[D]. 上海: 同济大学, 2017.
    (LI Tao.Three-dimensional DEM simulation and constitutive model of unsaturated structural loess[D]. Shanghai: Tongji University, 2017. (in Chinese))
    [5]
    李涛, 蒋明镜, 张鹏等.非饱和结构性黄土侧限压缩和湿陷试验三维离散元分析[J]. 岩土工程学报, 2018, 40(增刊1): 39-44.
    (LI Tao, JIANG Ming-jing, ZHANG Peng.DEM analyses of oedo- meter and wetting tests on the unsaturated structured loess[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 39-44. (in Chinese))
    [6]
    JIANG M J, KONRAD J M, LEROUOEIL S.An efficient technique for generating homogeneous specimens for DEM studies[J]. Computers and Geotechnics, 2003, 30(7): 579-597.
    [7]
    THORNTON C.Numerical simulations of deviatoric shear deformation of granular media[J]. Géotechnique, 2000, 50(1): 43-53.
    [8]
    SATAKE M, Fabric tensor in granular materials[C]// Procee- dings of IUTAM Symposium on Deformation and Failure of Granular Materials. Delft: Rotterdam, 1982: 63-68.
    [9]
    BARRETO D, O’SULLIVAN C, ZDRAVKOVIC L. Quantifying the evolution of soil fabric under different stress paths[C]// Powders and Grains 2009: Proceedings of the 6th International Conference on Micromechanics of Granular Media. Golden, 2009: 181-184.
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