中文摘要：

通过介绍扩展有限元的概念及方法,应用ABAQUS有限元分析半刚性沥青道路在持续降温情况 下反射裂缝的扩展过程.通过模拟分析,发现只有当温度下降到一定值之后裂缝才开始扩展,而一旦超过该温度裂缝将会急速扩展贯穿面层,然后扩展速率下降趋于稳定;损伤能在面层出现张开量时急速增长直至面层完全张开时稳定不再变化.

英文摘要：

Through introducing the concepts of extend finite element method （XFEM）, applying the finite element method of ABAQUS to analyze the crack propagation of asphalt pavement with reflective crack under the condition of continuous decreasing temperature. The results show that while the tempera- ture dropped to a certain value the crack initiates propagation and once beyond the value the crack prop- agation rate will rapidly increases till the crack through the surface; damage energy rapid growth when the surface crack appears and doesn＇ t change while the surface crack is enough open.