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将损伤演化律应用到无损的黏弹性本构模型中,以描述沥青混合料的蠕变损伤行为。采用阶跃式损伤演化律,近似刻画损伤增长,获得了与试验结果比较吻合的沥青砂、沥青混合料完整的3阶段蠕变曲线;结合现有商业有限元软件,模拟了沥青混凝土路面的车辙形成过程,得到了车辙深度随时间增长曲线和车辙形成过程中不同时刻的损伤演化云图,对于揭示沥青混凝土路面车辙形成的原因和机理有重要意义。
The damage evolution law is applied to the lossless viscoelastic constitutive model to describe the creep damage behavior of asphalt mixture. By using the step damage evolution law, the damage growth is approximated and the complete 3-stage creep curves of asphalt sand and asphalt mixture are obtained in accordance with the experimental results. Combined with the existing commercial finite element software, the rutting of asphalt pavement is simulated. The rutting depth curve with time and the cloud image of damage evolution at different times during rutting are obtained, which is of great significance for revealing the reason and mechanism of the rutting of asphalt pavement.