温度应力下沥青路面表面裂缝扩展的数值模拟研究

Simulation of surface crack propagation in asphalt concrete pavement

基于线弹性断裂力学的有限元法,分析了沥青路面开裂以后的温度应力及裂缝在温度作用下的扩展规律,对裂缝尖端的应力强度因子及其与路面温度分布和路面材料特性参数之间的关系进行了数值分析。分析结果表明,在沥青路面的抗裂设计中,合理设计沥青面层的厚度和优选温缩性小的路面材料是提高沥青路面抗裂性能的两个重要方面。

In this paper based on the linear elastic fracture mechanics of the finite element method, analysis of the asphalt pavement cracking after thermal stress cracks in the temperature and the expansion of the role of the crack tip and the stress intensity factor and the temperature distribution and road pavement material parameters of the relationship between the numerical analysis. Results showed that the cracking in the asphalt pavement design, the rational design of asphalt surface layer thickness and optimization of small shrinkage temperature of the surface of asphalt pavement cracking is to improve the performance of two important aspects.