In this study, dynamic moduli of asphalt mixtures under uniaxial compression (UC), indirect tension (IDT) and four-point bending (4PB) loading modes were tested and incorporated in the MEPDG procedure to predict the pavement responses. The field responses from a full-scale asphalt pavement were used to evaluate the prediction accuracies of three types of moduli. It was found that the current MEPDG procedure using UC modulus underestimates the strain responses of the pavement. Alternatively, the use of 4PB modulus in the MEPDG generates accurate strain predictions at the intermediate temperatures, but not at high temperatures. The combined use of UC modulus and the adjusted loading frequency, $f^{\prime }=1/(2\pi t)$ also generates accurate strain predictions at the intermediate temperatures. At high temperatures, the combined use of the 4PB modulus and $f^{\prime }=1/(2\pi t)$ was found to generate the most accurate prediction results. Accurate prediction of asphalt pavement responses is apparently dependent on the proper selection of modulus type and loading frequency.

在这项研究中，测试了沥青混合料在单轴压缩 (UC)、间接拉伸 (IDT) 和四点弯曲 (4PB) 加载模式下的动态模量，并将其纳入 MEPDG 程序以预测路面响应。使用全尺寸沥青路面的现场响应来评估三种模量的预测精度。发现当前使用 UC 模量的 MEPDG 程序低估了路面的应变响应。或者，在 MEPDG 中使用 4PB 模量可以在中间温度而不是高温下生成准确的应变预测。结合使用 UC 模量和调整后的加载频率，$F^{\text{'}}=1/(2\pi 吨)$还可以在中间温度下生成准确的应变预测。在高温下，4PB模量和$F^{\text{'}}=1/(2\pi 吨)$被发现可以产生最准确的预测结果。沥青路面响应的准确预测显然取决于模量类型和加载频率的正确选择。