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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。
Based on the finite element method of linear elastic fracture mechanics, the thermal stress and crack propagation under the action of temperature are analyzed. The stress intensity factor of the crack tip and its relationship with the temperature distribution of pavement and the characteristic parameters of pavement materials Relationships were numerically analyzed. The analysis results show that in the anti-cracking design of asphalt pavement, the rational design of the thickness of asphalt pavement and the preference of pavement materials with small temperature shrinkage are two important aspects to improve the cracking resistance of asphalt pavement.