作　　者： ; ; ;

机构地区： 东南大学交通学院

出　　处： 《交通科技》 2009年第4期72-74,77,共4页

摘　　要： 基于传统疲劳强度理论,用修正系数的方法来估计裂缝扩展阶段的寿命没有任何的理论依据。提出两阶段方法预估沥青路面结构的疲劳寿命,运用有限元方法对沥青路面进行疲劳断裂分析,研究沥青路面裂缝的扩展规律。 Based on the traditional fatigue theory, there is no theoretical basis for using the correction factor method to predict the life of crack propagation phase. In this paper, two-stage method is proposed to predict the fatigue life of asphalt pavement. The fatigue rupture of asphalt pavement is analyzed with finite element method andthe crack propagate law of pavement is studied. In the crack appearance phase fatigue law gained from the laboratory tests is used, meanwhile in the crack propagation phase, fatigue law of crack propagation based on Fracture Mechanics is used. Two-stage method can be used to guide the asphalt pavement design and explore ways to lengthen the pavement service life in practice.

关 键 词： 疲劳寿命 两阶段 裂缝扩展 应力强度因子

领　　域： [交通运输工程] [理学] [理学]