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Flexible Pavement Design Criterion Based on Octahedral Shear Stresses

机译：基于八面体剪应力的柔性路面设计准则

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Abstract>The judicious pavement design is the key factor in achieving the longest service life and the lowest maintenance and rehabilitation costs. It is based on the consideration of the phenomena in which the pavement structures are subjected to exploitation and the limitation of their destructive effects.>The aim of this study is to verify the possibility of implementing in the flexible pavement structures design practice of another design criterion based on limiting the bituminous mixtures creep phenomenon and that to be called: The criterion of admissible octahedral shear stresses in the bituminous layers.>Estimation of octahedral shear stresses is done with a calculation model based on finite element method, and hereafter referred to as 2D ASFEM (2D Axi-Symmetric Finite Element Model). The paper presents the results obtained by modeling several specific calculation assumptions for the behaviour of flexible pavement structures in service.>The study underlines the fact that the Octahedral Shear Stresses Ratio (OSSR) can be an additional design criterion to be taken into account when designing flexible pavement structures alongside other established criteria.
机译：摘要 >明智的路面设计是实现最长使用寿命和最低维护与修复成本的关键因素。它是基于对路面结构遭受破坏的现象及其破坏性作用的限制的考虑。 >本研究的目的是验证在柔性路面结构中实施的可能性。另一种基于限制沥青混合物蠕变现象的设计准则的设计实践，该准则被称为：沥青层中允许的八面体剪应力的准则。 >八面体剪力的估算应力是基于有限元方法的计算模型完成的，以下称为 2D ASFEM （ 2D A xi- S 对称 F inite E lement M odel）。本文介绍了通过对使用中的柔性路面结构的行为的几个特定计算假设进行建模而获得的结果。 >该研究强调了 O 正面体 S < / bold> hear S tresses R atio（ OSSR ）可以作为设计其他柔性路面结构时要考虑的附加设计标准既定标准。

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