以基层底面弯拉应力为控制指标的沥青路面可靠性分析

Reliability Analysis Procedures for the Method of Flexible Pavements Design with Base Layer Tensile Stress Criteria

对以基层底面弯拉应力为控制指标的沥青路面设计方法进行了可靠性分析。采用蒙特卡洛模拟法，得到路面结构、疲劳寿命、可靠度三者的关系图。研究表明增加面层或基层厚度对提高疲劳寿命可靠度都是很有效的。路面的疲劳寿命对各参数的变异性的敏感程度按由大到小的顺序依次为：ｈ２，Ｐ，ｈ１；Ｅ２，Ｅ３，Ｅ１。

reliability analysis procedure is developed for the flexible pavements design method based on base layer tensile stress criteria. The relationships among pavement structure, fatigue life and reliability are presented using Monte Carlo simulation method. The results indicate that the thickness increase of both surface and base are efficient to improve the reliability of fatigue life. The fatigue life is sensitive, in the descending order, to the variation of h2, P,h1,E2,E3, E1.