沥青混合料粘弹性疲劳本构模型  

A Viscoelastic Fatigue Constitutive Model of Asphalt Mixture

作　　者：吕松涛[1] 马健[1] 郑健龙[1] 田小革[1] 

机构地区：[1]长沙理工大学公路工程学院,湖南长沙410076

出　　处：《长沙交通学院学报》2006年第4期33-37,共5页Journal of Changsha Communications University

基　　金：国家自然科学基金资助项目(编号:50178012;50408007)

摘　　要：采用疲劳应力分解的方法,把总的疲劳效应分解为一个蠕变效应和一个简单疲劳效应的叠加,利用粘弹性力学的积分型本构关系、动态性能以及模型理论,得到了沥青混合料的粘弹性疲劳本构模型。最后,基于应力控制的疲劳试验,运用O rigin软件的非线性曲线拟合功能,对试验结果进行了拟合,理论模型与试验结果吻合较好,证实了该模型的可行性,并对该模型进行了推广。Using the separating method for fatigue stress, the total fatigue effects can be decomposed to creep impact and simple fatigue effects. The viscoelastic fatigue constitutive model for asphalt mixture was deduced using the integral constitutive model, dynamic performance and model theory of viscoelastic mechanics. Based on the stress controlling fatigue test, the test result was fitted using the non-linear curve fit function of Origin software. The result of the theoretical model is close to the fatigue test, the feasibility of this model is proved, moreover, the model is extended.

关 键 词：沥青混合料 粘弹性 疲劳 蠕变 本构模型 

分 类 号：U416.217[交通运输工程—道路与铁道工程]