沥青混合料黏弹性主曲线模拟及换算  

VISCOELASTIC MASTER CURVE SIMULATION AND CONVERSION OF ASPHALT MIXTURES

作　　者：王志臣[1,2] 郭乃胜[3] 赵颖华[3] 陈忠达[2] 

机构地区：[1]长安大学材料科学与工程学院,陕西西安710061 [2]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [3]大连海事大学道路与桥梁工程研究所,大连辽宁116026

出　　处：《工程力学》2017年第2期242-248,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51308084);中央高校基本科研业务费专项资金项目(3132014223)

摘　　要：基于时间-温度等效原理将不同温度下沥青混合料的储存模量和蠕变柔量进行平移形成主曲线,采用广义Maxwell和Kelvin模型分别模拟沥青混合料的松弛和蠕变特性,利用Prony级数表达式和Laplace变换实现黏弹性主曲线间的相互换算,并将换算结果与试验结果进行了比较。结果表明,广义Maxwell和Kelvin模型可以较好地模拟沥青混合料黏弹性主曲线,储存模量和蠕变柔量主曲线相互换算结果与试验结果规律基本一致,松弛模量实际结果应介于由储存模量和蠕变柔量换算的松弛模量主曲线之间,这可为沥青混合料黏弹性力学研究及黏弹性参数的获取提供有益参考。Master curves of dynamic modulus and creep compliance of asphalt mixtures at different temperatures are developed on the basis of time-temperature superposition principle. Generalized Maxwell and Kelvin models are performed to simulate relaxation and creep behavior, respectively. The viscoelastic master curves are converted reciprocally by using Prony series and Laplace transformation principle, and the converted master curves are compared with test results. The results show that the generalized Maxwell and Kelvin models can be employed to simulate viscoelastic master curves of asphalt mixtures; the viscoelastic master curves for creep and relaxation can be converted reciprocally; the master curves of storage modulus and creep compliance obtained from conversion are consistent with the test results; the authentic master curves of relaxation modulus should be between the results converted from storage modulus and creep compliance. The results provide a useful reference for the study on the viscoelastic mechanics and viscoelastic parameters of asphalt mixtures.

关 键 词：道路工程 沥青混合料 黏弹性 主曲线 动态模量 换算 

分 类 号：U414[交通运输工程—道路与铁道工程]