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<p>This study systematically investigates the dynamic properties of granite residual soil under cyclic loading and assesses the effects of different compaction degrees through dynamic triaxial tests. The experimental results show that under the same stress conditions, the plastic strain of granite residual soil decreases as compaction degree increases. During cyclic loading, the dynamic elastic modulus gradually increases and stabilizes when plastic strain remains below 0.1%, but decreases with cycles when exceeding this threshold. At low confining pressures, the dynamic elastic modulus of granite residual soil exhibits proportional growth with compaction degree, whereas no significant correlation occurs at high pressures. Additionally, a bounding surface model implemented through Abaqus UMAT subroutine is introduced, demonstrating superior simulation accuracy over classical elastoplastic models under high-stress cyclic loading conditions.</p>

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Dynamic Behavior and Numerical Simulation of Granitic Residual Soils Under Cyclic Loading

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Xin Xu,
  • Xuemao Feng,
  • Guoshun Lv,
  • Lianheng Zhao

摘要

This study systematically investigates the dynamic properties of granite residual soil under cyclic loading and assesses the effects of different compaction degrees through dynamic triaxial tests. The experimental results show that under the same stress conditions, the plastic strain of granite residual soil decreases as compaction degree increases. During cyclic loading, the dynamic elastic modulus gradually increases and stabilizes when plastic strain remains below 0.1%, but decreases with cycles when exceeding this threshold. At low confining pressures, the dynamic elastic modulus of granite residual soil exhibits proportional growth with compaction degree, whereas no significant correlation occurs at high pressures. Additionally, a bounding surface model implemented through Abaqus UMAT subroutine is introduced, demonstrating superior simulation accuracy over classical elastoplastic models under high-stress cyclic loading conditions.