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Simulation of Triaxial Tests for Unsaturated Soils under a Tension–Shear State by the Discrete Element Method

Author

Listed:
  • Guoqing Cai

    (Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
    School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Jian Li

    (Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
    School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Shaopeng Liu

    (CCCC Highway Consultants Co., Ltd., Beijing 100088, China)

  • Jiguang Li

    (Fujian Academy of Building Research, Fuzhou 350025, China)

  • Bowen Han

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Xuzhen He

    (School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo 2007, Australia)

  • Chenggang Zhao

    (Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
    School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

Abstract

In this paper, the discrete element method is used to simulate triaxial tests of unsaturated soil under a tension–shear state. A relationship between water content and uniaxial tensile strength with different void ratios is obtained, which is applied to uniaxial tensile discrete element simulations to establish a relationship between grain-scale parameters and water content from back analysis. A group of triaxial simulations for unsaturated soil under a tension–shear state is then conducted. The discrete element method is used to obtain the relationship between deviatoric stress and axial displacement with different water contents, and also to reveal the effects of water content on peak strength and dilatancy phenomena with different confining pressures. The displacement fields of numerical specimen are analyzed qualitatively, and the mechanism and process of failure are discussed from the prospective of energy and dissipation.

Suggested Citation

  • Guoqing Cai & Jian Li & Shaopeng Liu & Jiguang Li & Bowen Han & Xuzhen He & Chenggang Zhao, 2022. "Simulation of Triaxial Tests for Unsaturated Soils under a Tension–Shear State by the Discrete Element Method," Sustainability, MDPI, vol. 14(15), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:15:p:9122-:d:871270
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    References listed on IDEAS

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    1. Huaming An & Shunchuan Wu & Hongyuan Liu & Xuguang Wang, 2022. "Hybrid Finite-Discrete Element Modelling of Various Rock Fracture Modes during Three Conventional Bending Tests," Sustainability, MDPI, vol. 14(2), pages 1-26, January.
    2. Tan Li & Jianzhuang Xiao, 2021. "Discrete Element Simulation Analysis of Biaxial Mechanical Properties of Concrete with Large-Size Recycled Aggregate," Sustainability, MDPI, vol. 13(13), pages 1-19, July.
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    Cited by:

    1. Ruixia He & Ziwen Zhou & Sai Vanapalli & Xuyang Wu, 2024. "Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction," Sustainability, MDPI, vol. 16(5), pages 1-15, March.

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