基于横观各向同性的沥青路面加铺层力学分析  

Mechanical Analysis of Asphalt Concrete Overlay over Old Asphalt Pavements Considering Cross-anisotropy Properties

作　　者：刘能源[1] 颜可珍[1] 胡迎斌 游凌云[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2017年第5期96-103,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50808077;51278188);湖南省青年骨干教师资助计划项目~~

摘　　要：考虑到沥青混凝土呈现一定的横观各向同性特性,采用有限元数值分析方法,建立沥青加铺层路面三维有限元模型;将沥青加铺层及旧沥青面层视为横观各向同性体,并考虑了加铺层温度场特性和沥青混合料模量随温度变化的特性以及层间接触状态,研究了不同温度条件下沥青加铺层路面的力学行为,分析了沥青混合料的横观各向同性对加铺层路面的变形和应变等的影响.研究结果表明,沥青混凝土的横观各向同性及模量梯度特性和层间结合条件对加铺层受力状况都有较大影响.Considering the cross-anisotropy properties of asphalt concrete （AC）, finite element numeri- cal analysis was introduced to develop the three-dimensional （3D） Finite Element Model （FEM） of AC o- verlay placed on old asphalt pavements. The AC overlay and old asphalt layer were assumed to be cross-an- isotropic, and the temperature field characteristics of AC overlay as well as the variations of its modulus versus temperature were considered. And the mechanical behaviors of AC overlay at high and low tempera- tures and the effects of the cross-anisotropy properties of AC on its deformations and strains were then in- vestigated. The results show that the cross-anisotropy properties and modulus gradients of AC induced by temperature fields both had great effects on its mechanical behaviors.

关 键 词：沥青路面 沥青加铺层 横观各向同性 模量梯度 有限元模拟 

分 类 号：U416.217[交通运输工程—道路与铁道工程]