Abstract: Based on Burgers model,a four elements non linear rheological model (FENR) is developed.Its creep analytic solution shows that it can express the whole process of creep and creep rupture of asphalt concrete.In addition,the creep coincides with test results.Especially,FENR model supplies asphalt concrete with a creep rupture criterion σ_max.Taken Hills and Brien's assumption of pavement,the prediction equation for pavement cracking temperature is developed by using FENR model and discretization of temperature induced stresses.The computer program has been compiled,which can predict pavement cracking temperature under arbitrary monotonic cooling function.Thus,the problem existed in Hills and Brien's method is initially solved.The method and computer program are of practical value.

Key words: asphalt concrete, non-linear, rheological model, povement, cracking temperature, creep, viscoelasticity, prediction

摘要： 基于Burgers模型,提出了一个四元件非线性流变模型(FENR).其蠕变解表明,它可表征沥青砼蠕变直至破坏的全过程,且与实测值较吻合.特别地,该模型提供了沥青砼蠕变破坏判据σ_max.采用Hils和Brien的假定,并对温度应力进行离散化处理,利用该模型推导了路面缩裂温度预估方程,编写了求解程序,可预估任意单调降温条件下的路面缩裂温度.初步解决了破裂温度预估法存在的问题,可供实用.

关键词: 沥青混凝土, 非线性, 流变模型, 路面, 缩裂温度, 蠕变, 粘弹性, 预估