基于双模量理论的不同沥青路面力学分析  

Mechanical analysis of typical asphalt pavement based on bi-modulus theory

作　　者：潘勤学[1] 张同升 魏玉峰 甄西东 孙杰[2] 宋小金 蒋宇翔 姜舜君 胡嘉 PAN Qinxue;ZHANG Tongsheng;WEI Yufeng;ZHEN Xidong;SUN Jie;SONG Xiaojin;JIANG Yuxiang;JIANG Shunjun;HU Jia(National Engineering Research Center of Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China;Ji′nan Urban Construction Group Co.,Ltd.,Ji′nan 250031,China;Hunan Huacheng Testing Technology Co.,Ltd.,Changsha 410036,China;School of Civil Engineering,Central South University,Changsha 410083,China;Ji′nan Urban Construction Kinetic Energy Conversion Development and Construction Group Co.,Ltd.,Ji′nan 250000,China)

机构地区：[1]长沙理工大学公路养护技术国家工程研究中心,湖南长沙410114 [2]济南城建集团有限公司,山东济南250031 [3]湖南华城检测技术有限公司,湖南长沙410036 [4]中南大学土木工程学院,湖南长沙410083 [5]济南城建动能转换开发建设集团有限公司,山东济南250000

出　　处：《交通科学与工程》2024年第4期21-31,共11页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(52378441,51908071);湖南省自然科学基金项目(2024JJ5037);湖南省交通运输厅科技进步与创新计划项目(202107)。

摘　　要：为研究考虑拉压模量差异的沥青路面结构力学响应变化规律,基于双模量理论对5种典型沥青路面结构进行了力学对比分析。研究结果表明:基于传统线弹性理论与双模量理论计算得到的关键力学响应差距巨大,用这两种方法计算得到的倒装式沥青路面结构、柔性基层沥青路面结构及刚性基层沥青路面结构的力学响应的最大差距分别达55%、33%及50%;5种沥青路面结构路表均存在较大的横向拉应变,建议在路面结构设计时将路表轮隙区纳入拉应变验算点位;基层刚度与厚度对路面结构层关键力学响应影响显著,路表水平横向拉应力与拉应变均随着基层刚度及厚度的增大而增大,基层底部纵向拉应力则随着基层厚度的增大而减小。建议采用双模量理论开展沥青路面结构分析,且在路面设计时合理控制基层的厚度与刚度可有效优化路面结构的受力。To study the variation law of mechanical response of asphalt pavement structures considering the difference in tensile and compressive modulus.The mechanical comparative analysis of five typical asphalt pavement structures was based on the bi-modulus theory.The results indicates a significant disparity in the critical mechanical responses calculated using traditional linear elastic theory and the bi-modulus theory.The maximum discrepancies in the mechanical responses of inverted,flexible base,and rigid base asphalt pavement structures,calculated by two different methods,amounted to 55%,33%,and 50%,respectively.Significant transverse tensile strains were observed on the pavement surface across all five asphalt pavement structures.It is recommended that the wheel gap area on the pavement surface should be considered a critical point for checking tensile strain during pavement design.The stiffness and thickness of the base layer have a significant impact on the critical mechanical response of the pavement structure layer.The horizontal transverse tensile stress and tensile strain of the pavement surface increase with the stiffness and thickness of the base layer,while the longitudinal tensile stress at the bottom of the base layer decreases with increased the base layer thickness.It is recommended that the bi-modulus theory could be used to analyze the asphalt pavement structure,and that reasonable control of the thickness and stiffness of the base layer during pavement design can effectively optimize the stress on the pavement structure.

关 键 词：沥青路面 力学分析 双模量理论 力学响应 数值计算 

分 类 号：U416.217[交通运输工程—道路与铁道工程]