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基于线性黏弹性理论(LVE)推导出沥青混料在动态蠕变实验中的变形预估模型.然后,将线性黏弹性变形预估模型和实验结果对比,分析说明了线性黏弹性预估模型的不足.最后,为了提高预估准确性,对线性黏弹性预估模型进行了修正,使其具有与沥青混合料变形特性相符的非线性特性,并用实验数据对修正模型进行了验证.结果表明,线性黏弹性变形预估模型无法模拟沥青混合料的永久变形的非线性特性,而修正变形预估模型可以准确地预测动态蠕变实验中变形的全过程以及永久变形.说明了所提出的修正方法可以有效地提高线性黏弹性变形预估模型的准确性,该修正模型可以为沥青路面的车辙预估提供指导.
Based on the linear viscoelastic theory (LVE), the deformation prediction model of asphalt mixture in dynamic creep experiment is deduced.And then, comparing the linear viscoelastic deformation prediction model with the experimental results, the linear viscoelasticity prediction model In the end, in order to improve the prediction accuracy, the linear viscoelastic prediction model is modified to have the non-linear characteristics in accordance with the deformation characteristics of the asphalt mixture, and the experimental data are used to verify the correction model.The results show that, The linear viscoelastic deformation prediction model can not simulate the non-linear characteristics of the permanent deformation of asphalt mixture, while the modified deformation prediction model can accurately predict the whole process of deformation and permanent deformation in the dynamic creep experiments. The proposed correction method Which can effectively improve the accuracy of the linear viscoelastic deformation prediction model. The modified model can provide guidance for the rutting prediction of asphalt pavement.