沥青路面表面双裂纹粘弹性扩展规律研究

将沥青路面面层材料视为粘弹性材料，使用-5℃时的六参量广义Maxwell本构模型来模拟路面面层材料的本构关系。将行车荷载的作用形式视为半正弦波谱形式，通过大型通用有限元的2次开发功能，开发出在任意荷位进行循环加载的有限元子程序。建立共面双裂纹有限元计算模型，分析裂纹之间的干涉效应对裂纹扩展的影响，并得到一些有益结论。

Research on Laws of Viscoelastic Extension of Double Cracks on Surface of Asphalt Pavement

Regarding surface course materials of asphalt pavement as viscoelastic materials, this paper uses 6- parameter generalized Maxwell constitutive model at -5℃ to simulate constitutive relations between surface course materials of pavement. The paper treats the mode of action of driving load as semi -sine wave spectrum and develops finite element sub-program of circular loading at any load position via the secondary development function of large unive~＇sal finite element. The paper establishes finite element computing model for coplanar double cracks, analyzes influences of interference effect between cracks on extension of cracks, and obtains some beneficial conclusions.