沥青混合料动态粘弹性行为分析的模拟方法  

Modeling Method for Analysis of Dynamic Viscoelastic Behavior of Asphalt Mixture

作　　者：陈静云[1] 孙依人 张岩[2] 徐辉[1] 徐以恒 

机构地区：[1]大连理工大学交通运输学院,辽宁大连116024 [2]大连理工大学土木建筑设计研究院,辽宁大连116024 [3]大连理工大学土木工程学院,辽宁大连116024

出　　处：《中国公路学报》2014年第8期11-16,共6页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50578031)

摘　　要：为了更好地分析沥青混合料的动态粘弹性行为,描述了一种基于Havriliak-Negami(HN)模型的模拟方法。利用3种不同类型的沥青混合料复数模量试验数据对该方法的有效性进行了说明,并将结果与Sigmoidal方法的计算结果进行了比较分析。结果表明:该方法克服了Sigmoidal方法模拟沥青混合料动态粘弹性行为的3个主要缺点,HN模型提供了一个非对称的拐点,能模拟更为复杂的非对称动态粘弹性行为;不同粘弹性函数的解析式均来源于同一个复数模量模型,模型间精确满足Kronig-Kramers关系;在确定模型参数时同时考虑了储能模量和损耗模量,计算结果符合线粘弹性理论。HN模型可以精确描述沥青混合料与时间相关的粘性行为,故可以考虑用于基于层状粘弹性体系理论的路面设计方法。To better analyze dynamic viscoelastic behavior of asphalt mixture, a modeling method based on Havriliak-Negami （HN） model was described. The effectiveness of the method was illustrated using complex modulus data of three different asphalt mixtures. And the results were compared with those from Sigmoidal method. The results show that the method overcomes 3 principal shortcomings of Sigmoidal method of modeling dynamic viscoelastic behavior for asphalt mixture. First, HN model provides a non-symmetric inflection point; therefore, HN approach can model the more complex non-symmetric dynamic viscoelastic behavior. The analytical expressions for various viscoelastic functions are all derived from the same complex modulus model; thus, the Kronig-Kramers relations between the models are accurately satisfied. In addition, both storage modulus and loss modulus are considered in determining the model parameters; hence, the calculated results comply with linear viscoelastic theory. Since HN model can accurately characterize the time-dependent viscous behavior of asphalt mixture, it can beapplied to the asphalt pavement design method based on the layered viscoelastic system theory.

关 键 词：道路工程 沥青混合料 Havriliak-Negami模型 动态粘弹性 复数模量 主曲线 

分 类 号：U416.217[交通运输工程—道路与铁道工程]