To capture the grading-dependence of the shear stiffness of heterogeneous granular aggregates, a new grading parameter that considered the size distribution of the entire aggregates was developed. Both the coefficient of uniformity and median particle size decreased with increasing the grading parameter. A general increase of the shear stiffness with increasing the grading parameter was observed. Comparison with experimental results revealed that the proposed grading parameter had a stronger correlation with the material constants of Hardin’s stiffness formula than the coefficient of uniformity, which is a traditional grading parameter.

中文翻译：

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用于评估粒状骨料抗剪刚度的等级依赖性的等级参数

为了捕获非均质粒状骨料的剪切刚度的等级依赖性，开发了一种考虑整个骨料尺寸分布的新等级参数。均一性系数和中值粒径均随分级参数的增加而降低。观察到剪切刚度随分级参数的增加而总体上增加。与实验结果的比较表明，与传统的分级参数均匀度系数相比，拟议的分级参数与哈丁刚度公式的材料常数具有更强的相关性。