Moharekpour Milad, Liu Pengfei, Schmidt Joshua, Oeser Markus, Jing Ruxin
Institute of Highway Engineering, RWTH Aachen University, D52074 Aachen, Germany.
Pavement Engineering, Delft University of Technology, 2628 CN Delft, The Netherlands.
Materials (Basel). 2022 Mar 18;15(6):2252. doi: 10.3390/ma15062252.
The Guide for Design of Pavement Structures (AASHTO 86/93) and Mechanistic Empirical Pavement Design Guide (MEPDG) are two common methods to design continuously reinforced concrete pavement (CRCP) published by the American Association of State Highway and Transportation Officials (AASHTO) in the USA. The AASHTO 86/93 is based on empirical equations to assess the performance of highway pavements under moving loads with known magnitude and frequency derived from experiments on AASHTO road tests. The MEPDG is a pavement design method based on engineering mechanics and numerical models for analysis. It functions by incorporating additional attributes such as environment, material properties, and vehicle axle load to predict pavement performance and degradation at the selected reliability level over the intended performance period. In order to evaluate the CRCP design procedure and performance, crack width (CW) and crack spacing (CS) from five examined test tracks in Europe with different climate condition, base layer, geometry, and materials were collected in this paper and compared with predicted distresses as well as CW and CS from AASHTO 86/93 and MEPDG design methods. The results show that the interactions between geometrics, material properties, traffic, and environmental conditions in the MEPDG method are more pronounced than in the AASHTO 86/93 and the prediction of CS and CW based on MEPDG matched closely with the recorded data from sections.
《路面结构设计指南》（AASHTO 86/93）和《力学经验路面设计指南》（MEPDG）是美国州公路和运输官员协会（AASHTO）发布的两种常见的连续配筋混凝土路面（CRCP）设计方法。AASHTO 86/93基于经验公式，通过AASHTO道路试验得出的已知大小和频率的移动荷载来评估公路路面的性能。MEPDG是一种基于工程力学和数值模型进行分析的路面设计方法。它通过纳入环境、材料特性和车辆轴载等其他属性来发挥作用，以预测在选定可靠性水平下预期性能期内的路面性能和退化情况。为了评估CRCP的设计程序和性能，本文收集了欧洲五条不同气候条件、基层、几何形状和材料的试验路段的裂缝宽度（CW）和裂缝间距（CS），并与预测病害以及AASHTO 86/93和MEPDG设计方法得出的CW和CS进行了比较。结果表明，MEPDG方法中几何形状、材料特性、交通和环境条件之间的相互作用比AASHTO 86/93更为显著，基于MEPDG对CS和CW的预测与路段记录数据紧密匹配。
