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<p>The results from experimentally validated 3D discrete element modeling of constant volume cyclic simple shear test of Pea gravel are presented in this paper. A realistic representation of Pea gravel assembly in terms of total particle&#xa0;number, size, and rolling resistance distribution was used in the DEM simulations to study the stress-controlled cyclic simple shear response. Considering a distribution of rolling resistance coefficients determined from the&#xa0;particles' shape characteristics accounts for the diversity of particle shapes in soil and provides a more realistic representation of soil assembly for the numerical simulation. The simulation results show that there are some discrepancies between cyclic shear stress ratio, generated pore pressure and shear strain induced inside the specimen and measured at the boundaries (as done in laboratory), which are important to be taken into consideration for better and more accurate interpretation of the experimental results for analysis of the liquefaction behavior of the soil specimen.</p>

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Investigation of the Cyclic Simple Shear Response of Pea Gravel Using the Discrete Element Method

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Nina Zabihi,
  • Adda Athanasopoulos-Zekkos

摘要

The results from experimentally validated 3D discrete element modeling of constant volume cyclic simple shear test of Pea gravel are presented in this paper. A realistic representation of Pea gravel assembly in terms of total particle number, size, and rolling resistance distribution was used in the DEM simulations to study the stress-controlled cyclic simple shear response. Considering a distribution of rolling resistance coefficients determined from the particles' shape characteristics accounts for the diversity of particle shapes in soil and provides a more realistic representation of soil assembly for the numerical simulation. The simulation results show that there are some discrepancies between cyclic shear stress ratio, generated pore pressure and shear strain induced inside the specimen and measured at the boundaries (as done in laboratory), which are important to be taken into consideration for better and more accurate interpretation of the experimental results for analysis of the liquefaction behavior of the soil specimen.