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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。
Based on the time-temperature equivalence principle, the storage modulus and creep compliance of asphalt mixtures were transformed to form the master curve. The generalized Maxwell and Kelvin models were used to simulate the relaxation and creep characteristics of asphalt mixtures respectively. The numerical expressions and the Laplace transform realize the conversion between the viscoelastic main curves, and the conversion results are compared with the experimental results. The results show that the generalized Maxwell and Kelvin models can well simulate the main curve of viscoelasticity of asphalt mixtures. The results of the conversion between the storage modulus and the creep compliance principal curves are basically consistent with the experimental results. The actual results of relaxation modulus should be between Storage modulus and creep compliance of relaxation modulus between the main curve, which can provide a useful reference for viscoelasticity of asphalt mixture and access to viscoelastic parameters.