考虑材料正交各向异性时的沥青路面结构力学性能  

Mechanical properties of asphalt pavement considering orthotropy of each layer materials

作　　者：杨涛[1,2] 郑健龙[1] 关宏信[1] 林淼[1] 曾勇[1] YANG Tao ZHENG Jianlong GUAN Hongxin LIN Miao ZENG Yong(School of Traffic ＆ Transportation, Changsha University of Science ＆ Technology, Changsha 410114, China Wenzhou Communications Investment Group Co. Ltd., Wenzhou 325003, China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]温州交通投资集团有限公司,浙江温州325003

出　　处：《中南大学学报（自然科学版）》2016年第12期4283-4291,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51038002)~~

摘　　要：基于正交各向异性理论,分别定义了弹性模量、泊松比和剪切模量这3种参数的各向异性度。对典型的沥青路面结构进行有限元计算,分析这3种各向异性度单独变化以及同步变化时路面结构力学性能的变化规律。计算分析结果表明:沥青面层最大剪应力基本上只受面层平面2个方向之间各向异性的影响,基层层底拉应力受基层平面2个方向之间各向异性的影响最大;路表弯沉受路基平面2个方向之间各向异性的影响最大,剪切模量各向异性对路表弯沉、泊松比各向异性对面层最大剪应力都基本没有影响,弹性模量各向异性对路面各力学指标有较大影响;路基路面材料平面2个方向之间的各向异性不容忽视。Based on orthotropy theory, the anisotropy degrees of elastic modulus, Poisson＇s ratio and shear modulus were defined respectively. Finite element calculations were carried out for one of typical asphalt pavement structure. The mechanical properties of pavement structure were analyzed when the three types of anisotropy degree varied simultaneously and alone. The analysis results indicate that the shear stress in asphalt surface course is only affected by the anisotropy between two directions of the plane of asphalt surface course. The anisotropy between two directions of the plane of base course has the greatest impact on the tensile stress at bottom of base course. The anisotropy between two directions of the subgrade plane has the greatest impact on surface deflection. Shear modulus anisotropy has little effect on surface deflection, Poisson＇s ratio anisotropy has little effect on shear stress in asphalt surface course. Mechanical properties of pavement are greatly affected by elastic modulus anisotropy. The anisotropy between two directions of the plane of subgrade and pavement can not be ignored.

关 键 词：正交各向异性 沥青路面 有限元 弹性模量 泊松比 剪切模量 

分 类 号：U416.217[交通运输工程—道路与铁道工程]