In this study, macroscale responses of asphalt concrete (AC) are predicted from the responses of its corresponding microscale representative volume element (RVE) within a finite element framework using quasi-static and dynamic analyses. Nanoindentation test was performed on the mastic and aggregate phase of an AC sample to determine the viscoelastic and elastic properties of RVE elements. Aggregate-mastic proportions in the RVE were obtained from the morphological image analysis. Macroscale model responses were compared with the AC pavement responses obtained from an instrumented pavement section subjected to falling weight deflectometer loading and a class 9 vehicle. Model responses are very close to the actual responses. The multiscale analyses show that tensile strain in microscale RVE is 5–10 times higher than that in a macroscale element. Furthermore, multiscale analyses also show that variations in the microscale RVE, such as the reduction in the aggregate-mastic ratio or increment in the voids, can increase the maximum tensile strain at the bottom of the AC in macroscale model by around 25%.

在这项研究中，使用准静态和动态分析从有限元框架内相应的微观代表体积元素（RVE）的响应中预测沥青混凝土（AC）的宏观响应。在AC样品的乳香和聚集相上进行了纳米压痕测试，以确定RVE元素的粘弹性和弹性。从形态图像分析中获得了RVE中的骨料-骨料比例。将宏观模型的响应与从仪表化路面部分获得的交流路面响应进行了比较，其中该路面部分承受了重量下降偏转计载荷和9级车辆的冲击。模型响应非常接近实际响应。多尺度分析表明，微观尺度RVE中的拉伸应变比宏观尺度元素高5-10倍。