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首页> 外文期刊>American journal of applied sciences >Prediction of Permanent Deformation of Pavement's Unbounded Layers Based on Cyclic Triaxial Tests | Science Publications
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Prediction of Permanent Deformation of Pavement's Unbounded Layers Based on Cyclic Triaxial Tests | Science Publications

机译：循环三轴试验的路面无界层永久变形预测科学出版物

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摘要

> This research presents an analytical model for determining permanent deformation of pavement's sub grade and unbound granular base and sub-base material due to cyclic traffic loading. The model is given for interpreting results of repeated load triaxial tests. It considers long term elastoplastic behavior and resilient behavior of sub-grade and unbound granular material. Permanent deformations are expressed as a function of the number of loading cycles and the spherical component and the deviatoric component of the repeated loading. The permanent axial deformation is given as a function of the resilient modulus and the secant modulus for different states of spherical and distortional stresses, and number of loading cycles. By analytical derivation it is presented that the normalized permanent axial strain can be expressed with the modulus values and the parameter D. The moduli are expressed as the functions of the spherical stress component and the distortional stress component. The magnitude of normalized permanent axial strain depends on the limit value of the resilient modulus and ratios between resilient and secant modulus. The parameter D gives the shape of the change of the normalized permanent axial strain with the number of cycles, and is a function of the change of modules with the number of cycles. The applicability of the presented model is demonstrated on the practical example of a repeated load triaxial test of sub-base granular material.
机译： >这项研究提供了一种分析模型，用于确定由于循环交通荷载而引起的路面基层和未结合的粒状基层和基层材料的永久变形。该模型用于解释重复载荷三轴试验的结果。它考虑了路基和未结合的颗粒材料的长期弹塑性行为和回弹行为。永久变形表示为加载循环次数以及重复加载的球面分量和偏斜分量的函数。对于球形和变形应力的不同状态以及加载循环的次数，永久轴向变形是弹性模量和割线模量的函数。通过分析推导表明，归一化的永久轴向应变可以用模量值和参数D表示。模量表示为球面应力分量和变形应力分量的函数。归一化的永久轴向应变的大小取决于弹性模量的极限值以及弹性模量和割线模量之间的比率。参数D给出归一化永久轴向应变随循环次数变化的形状，并且是模块随循环次数变化的函数。在子基粒状材料的反复载荷三轴试验的实例中证明了所提出模型的适用性。

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