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利用通用有限元程序ABAQUS对混凝土梁桥沥青混凝土铺装层的车辙问题进行了非线性有限元模拟计算与分析。采用时间硬化的蠕变模型,考虑横向加载位置对车辙深度的影响,着重研究了车辙发展的历史,分析了构成车辙的主要因素。认为横向加载位置对车辙影响不大;车辙早期以沥青混凝土压密为主,后期则以水平流动变形为主;它主要发生在沥青铺装下面层,与竖向蠕变应变有良好的相关关系。
The common finite element program ABAQUS is used to calculate and analyze the rutting problem of asphalt concrete pavement of concrete beam bridge by nonlinear finite element method. The time-hardening creep model is adopted to consider the influence of transverse loading position on the depth of rutting. The history of rutting development is mainly studied, and the main factors of rutting are analyzed. It is believed that the location of transverse loading has little effect on the rutting. The rutting is dominated by asphalt concrete compaction in the early stage and the horizontal flow deformation in the later stage. It mainly occurs in the asphalt pavement and has a good correlation with the vertical creep strain .