三维沥青混凝土细观断裂模型研究及分析

The Study on Three-dimensional Meso-fracture Model of Asphalt Concrete

为弥补沥青混凝土二维细观断裂模型在表征沥青混凝土的复杂的断裂特征方面还存在明显的缺陷与不足,在内聚力模型的基础上建立了三维细观断裂模型。本文介绍了建立模型的主要方法,分析了小梁数字试件的断裂过程,并和二维细观断裂模型进行了比较分析。结果表明:二维数字试件的最大承载力和三维数字试件的最大承载力基本一致,但达到最大承载力时消耗的能量和达到完全破坏时消耗的能量相差较大。

In order to compensate for defects and shortcomings of dimensional mesoscopic fracture model in characterizing the complex fracture characteristics of asphalt concrete aspects, the passage established the three-dimensional meso-fracture model based on cohesive zone model.It described the main methods of mod-eling and analysis of the fracture process of trabecular digital specimen and compared with two-dimensional mi-cro-fracture model.The results showed that the maximum carrying capacities of the largest two-dimensional and three-dimensional digital specimens are basically the same, but it had larger differences when it came to the maximum carrying capacity comparing with the completely destroyed.