Abstract: Deformation compostions of asphalt mixture were analyzed and a visco-elastoplastic rheological model framework including elastoplastic ，viscoelastic and viscoplastic deformation characterization was presented. Three modes , mainly described viscoplastic deformation , were established under three different hypothesis: ( viscoplastic stress was in proportion to creep acceleration; ( viscoplastic strain was a function of loading time; ( viscoplastic strain followed a strain -ha地nmg law , and then viscoplastic behavior models were obtained. Uni-axial- compression creep tests were performed under different stress amplitudes (0. 10 , O. 15 , 0.20 , 0.25 and 0.30 MPa) , and the model parameters were obtained. The data of three proposed models were quantitatively compared with the experimental data. It is shown that the results of the three proposed models all have a good agreement with the experimental ones at the lower stress condition , but at the higher stress condition , model 2 is the best , model 1 comes second , and model 3 is poor to predict the initial creep.

Key words: road engineering, asphalt mixtures, viscoplastic behavior description, viscoplastic behavior model, compression creep experiment, model parameters

摘要： 分析了沥青混合料的变形组成，提出了包含弹塑性、勃弹性和教塑性变形分量的本构框架，采用3种不同方式 描述其数塑性变形，分别得到相应的秸弹塑性本构模型:模型I一一假定勃塑性应力与蠕变加速度成正比;模型 2一一假定数'性系数是加载时间函数;模型3一一假定秸塑性应变满足应变硬化定律;进行试样在0.10，0.15,0.20, 0.25和0.30MPa应力下单轴压缩蠕变实验，求得模型参数，对比研究了模型预测值和实验值。研究表明:较低应 力下3种模型完整反映了沥青棍合料压缩蠕变的整个过程;在较高应力时，模型2预测值与实验结果吻合最好，模 型1次之，模型3预测初始蠕变效果最差。

关键词: 道路工程, 沥青泪合料, 蒙古塑性描述, 教弹塑性本构模型, 压缩蠕变实验, 模型参数