基于横观各向异性的分数阶粘弹性路面力学行为及参数反演研究

Viscoelasticity and anisotropism are obvious properties of asphalt concrete material. Thus, the pavement structure design and analysis based on the theory of the isotropic elastic system has obvious limitations. This project will introduce the newly development fractional derivative viscoelastic model which can accurately reflect the asphalt mixture complex viscoelastic properties, and will take the Transverse anisotropy of asphalt surface materials into consideration, develop a viscoelastic layered pavement structure model based on Transverse anisotropy. This project will explore the influence law and failure mechanism of material anisotropy and viscoelastic by using analytic method and finite element method to study the pavement structure dynamic and static characteristics. This project will develop a dynamic response model of viscoelasticity of asphalt pavement structure, which based on the displacement of time domain information, and combine with homotopy method to back calculate the parameters of the asphalt pavement structure. The objective of the study is improving the pavement analysis level, revealing the asphalt pavement material viscoelastic anisotropic influence law of pavement structural behavior, providing valuable theoretical guidance for modification or guidance of pavement structure design, explanation of the fracture mechanism of the pavement structure and the back calculation of pavement structure parameters.

沥青混凝土材料具有明显的粘弹性和各向异性特性，基于各向同性弹性体系理论的路面结构设计和分析具有明显的局限性。本项目将引入新近发展的能较准确反映沥青混合料复杂粘弹性特性的分数导数粘弹性模型，并考虑沥青混合料面层材料的横观各向异性，建立基于横观各向异性的粘弹性层状路面结构模型，采用解析法和有限元等方法来研究路面结构的动、静力学特性，探索材料各向异性和粘弹性对路面力学行为的影响规律和破坏机理。建立基于时域位移信息的粘弹性沥青路面结构的动力响应模型，并结合同伦方法理论来反演沥青路面结构的参数。通过本项目的研究有望提升路面分析水平，揭示沥青路面材料粘弹性各向异性对路面结构行为的影响规律，为修正或指导路面结构设计，解释路面结构破坏机理和路面结构参数反算提供有价值的理论指导。

沥青混凝土材料具有明显的粘弹性和各向异性特性，基于各向同性弹性体系理论的路面结构设计和分析具有明显的局限性。本项目将引入新近发展的能较准确反映沥青混合料复杂粘弹性特性的分数导数粘弹性模型，并考虑沥青混合料面层材料的横观各向异性，建立基于横观各向异性的粘弹性层状路面结构模型，采用解析法和有限元等方法来研究路面结构的动、静力学特性，探索材料各向异性和粘弹性对路面力学行为的影响规律和破坏机理。建立基于时域位移信息的粘弹性沥青路面结构的动力响应模型，并结合同伦方法理论来反演沥青路面结构的参数。通过本项目的研究有望提升路面分析水平，揭示沥青路面材料粘弹性各向异性对路面结构行为的影响规律，为修正或指导路面结构设计，解释路面结构破坏机理和路面结构参数反算提供有价值的理论指导。