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<p>Undisturbed loess has particular structural characteristics because of its unique formation conditions and sedimentary environment. We conducted a comparative analysis of the dynamic characteristics of undisturbed loess, remolded loess, and saturated loess by conducting torsional shear tests on loess from Xi’an with different values of consolidation confining pressure and water content. Then, based on the concept of comprehensive structural potential, we defined initial structural indicators of loess under dynamic loading by means of the maximum dynamic shear stress that the three types of loess can withstand. We documented how these structural indicators change with changes in consolidation confining pressure and water content. Finally, we introduced the initial structural parameters into the Hardin–Drnevich hyperbolic model for calculating the initial shear modulus and maximum shear stress, and thus established a modified Hardin–Drnevich model suitable for structural loess.</p>

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Dynamic Characteristics of Structural Loess and its Modified Hardin–Drnevich Model

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Jiang Wu,
  • Shuai Shao,
  • Shengjun Shao,
  • Xiaokang Liu,
  • Jiayao Song

摘要

Undisturbed loess has particular structural characteristics because of its unique formation conditions and sedimentary environment. We conducted a comparative analysis of the dynamic characteristics of undisturbed loess, remolded loess, and saturated loess by conducting torsional shear tests on loess from Xi’an with different values of consolidation confining pressure and water content. Then, based on the concept of comprehensive structural potential, we defined initial structural indicators of loess under dynamic loading by means of the maximum dynamic shear stress that the three types of loess can withstand. We documented how these structural indicators change with changes in consolidation confining pressure and water content. Finally, we introduced the initial structural parameters into the Hardin–Drnevich hyperbolic model for calculating the initial shear modulus and maximum shear stress, and thus established a modified Hardin–Drnevich model suitable for structural loess.