作　　者： ; ;

机构地区： 东南大学交通学院

出　　处： 《公路交通科技》 2005年第12期1-4,共4页

摘　　要： 裂缝尖端应力强度因子是判断裂缝开裂扩展的重要指标,本文应用有限元软件ABAQUS,建立了20结点等参立方体单元的有限元模型,采用奇异等参元法及断裂力学理论,对路面基层裂缝问题进行了数值分析,分析探讨了路面结构参数对基层裂缝应力强度因子的影响及应力强度因子K1和K2在基层裂缝扩展过程中的变化规律,并预估了裂缝的扩展寿命。计算结果真实反映路面结构的现象和规律,可为高等级公路抗裂设计提供依据。 The stress intensity factor （SIF） at the crack tip is an important index to judge the crack development.In this paper a finite element analysis model of 20-nede isoparametric elements was established by the FEM software ABAQUS and the crack at the bottom of the semi-rigid base course was numerically analyzed with the singularity isoparametric elements method and fracture mechanics theory, The effect of pavement parameters on base crack was studied and the change of the stress intensity factor （ K1 and K2 ） in the course of base crack propagation was discussed, The life of crack propagation was estimated. The results reflected the pavement structure and performance for anti-crack design.

关 键 词： 沥青路面 基层 有限元法 断裂力学

领　　域： [交通运输工程]