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Numerical evaluation of pavement design parameters for the fatigue cracking and rutting performance of asphalt pavements

机译：沥青路面疲劳开裂和车辙性能的路面设计参数的数值评估

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Over recent years, significant research has been conducted to investigate ways to predict fatigue cracking and permanent deformation (rutting), which are two common distresses found in asphalt pavements. These distresses are affected by material properties, environmental conditions, and the pavement's structure. This paper investigates common pavement design parameters, including surface mixture type, base layer thickness, base layer type, sub-base layer thickness, and an anti-frost layer, with regard to the asphalt pavement performance of the Korea Expressway Corporation (KEC) test road. Test roads are often regarded as the most realistic tools for evaluating the effects of various parameters because they are subjected to real traffic and environmental factors. The KEC test road is 7.7 km long and was constructed with the aim of developing a Korean mechanistic-empirical pavement design guide. According to the findings, the surface layer type, base layer thickness, and base layer material type were found to affect the fatigue cracking and rutting performance, whereas the sub-base thickness and anti-frost layer were found not to affect the amount of distress significantly. The newly developed 'layered viscoelastic pavement analysis for critical distresses' (LVECD) program was able to capture the effects of the changes in the aforementioned parameters on the amount of cracking and rut depths. Reasonable agreement was found between the LVECD predictions and the field distress measurements. However, it remains necessary to develop a laboratory-to-field transfer function in order to obtain more accurate field performance predictions.
机译：近年来，已经进行了重要的研究，以研究预测疲劳裂纹和永久变​​形（车辙）的方法，这是沥青路面中常见的两个问题。这些困扰受材料特性，环境条件和人行道结构的影响。本文针对韩国高速公路公司（KEC）测试的沥青路面性能，研究了常见的路面设计参数，包括表面混合物类型，基础层厚度，基础层类型，次基础层厚度和防冻层。路。测试道路通常被视为评估各种参数影响的最现实的工具，因为它们会受到实际交通和环境因素的影响。 KEC测试道路长7.7公里，其目的是制定韩国的机械-经验路面设计指南。根据发现，发现表层类型，基层厚度和基层材料类型会影响疲劳裂纹和车辙性能，而基层厚度和防冻层则不会影响遇险量。显着。新开发的“危难分层粘弹性路面分析”（LVECD）程序能够捕获上述参数的变化对开裂量和车辙深度的影响。在LVECD预测与现场遇险测量之间找到了合理的共识。但是，仍然有必要开发实验室到现场的传递函数，以获得更准确的现场性能预测。

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