级配碎石回弹变形特性

级配碎石具有非线性的应力-应变特性,回弹模量是有效描述这一特性的参数,通过室内动三轴试验能够得到较好的模拟级配碎石回弹模量的模型。分析了影响级配碎石回弹变形特性的各种因素,并进行了试验验证。通过数据拟合发现,Uzan模型能更好地反映级配碎石的非线性回弹变形特性,且模型中的回归参数与级配中小于0.075mm筛孔的质量分数有一定的关联性。并针对影响级配碎石回弹模量的两个重要参数：级配中小于0.075mm筛孔的质量分数和含水质量分数,提出相应的取值范围建议。

Resilient deformation behavior of unbound stone aggregates

The unbound stone aggregates have a nonlinear stress-strain behavior, the resilient modulus can describe this character effectively, the resilient modulus model can be attained through dynamic load triaxial test. The affecting factors of the resilient deformation behavior of unbound stone aggregates are analyzed with dynamic load triaxial test. The result shows that the Uzan model can display nonlinear resilient deformation behavior of unbound stone aggregates accurately, and the regression coefficient has relationship with 0. 075 mm passing percent. The suggested scope of two important design parameters, 0. 075 mm passing percent and water content, is given. 5 tabs, 7 figs, 9 refs.