中文摘要：

为了正确预估沥青混合料的永久变形,提出利用基于Drucker-Prager屈服条件、＂时间硬化＂幂函数蠕变法则的线性Drucker-Prager蠕变模型对单轴静载蠕变试验的沥青混合料变形进行粘弹塑性有限元分析.通过对比沥青混合料的静载蠕变试验解析解和有限元解的一致性,发现线性Drucker-Prager蠕变模型适合于描述破坏阶段出现较晚的沥青混合料的蠕变性能,可用于预测沥青混合料的永久变形,进而研究沥青混合料的抗车辙性能.

英文摘要：

In order to correctly predict the permanent deformation of asphalt mixtures,visco-elastoplastic finite element analysis of deformation for asphalt mixtures under static creep tests is carried out via linear Drucker-Prager creep model with Drucker-Prager yield condition and ＂time-hardening＂ form of power law model.The linear Drucker-Prager creep model is then found as a proper description of creep properties of asphalt mixtures with lately appearing tertiary flow stage by comparing the consistency of analytical solution and finite element solution on static creep tests of asphalt mixtures.The results show that linear Drucker-Prager creep model could well predict permanent deformation of asphalt mixtures.Furthermore it can be used to study the anti-rutting performance of asphalt mixtures.