典型沥青路面结构力学响应的有限元分析  

Finite Element Analysis of Mechanical Responses of the Typical Asphalt Pavement Structures

作　　者：蔡莉莉 张东 许缪鑫 CAI Lili;ZHANG Dong;XU Miaoxin(JSTI Group Co.,Ltd.,Nanjing 210019,China;College of Transportation Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]苏交科集团股份有限公司,南京210019 [2]南京工业大学交通运输工程学院,南京211816

出　　处：《现代交通技术》2023年第1期23-26,共4页Modern Transportation Technology

基　　金：江苏省碳达峰碳中和科技创新专项资金(BE2022605);江苏省交通运输科技与成果转化项目重大专项(2022Z02)。

摘　　要：采用有限元的方法构建三维沥青路面模型,研究3种典型基层沥青路面结构(半刚性基层、柔性基层和复合式基层)在车轮荷载作用下的竖向压应力、竖向压应变、剪应力和弯拉应力等的力学响应。研究结果表明:半刚性基层沥青路面的承载能力强、变形小,但其基层和底基层层底的弯拉应力较大;柔性基层沥青路面的最大剪应力较小,但整体变形较大;复合式基层沥青路面由于铺设了柔性过渡层,力学响应介于两者之间,有较大的力学优势。The three-dimensional finite element models were constructed to study the vertical compressive stress,vertical compressive strain,shearing stress and flexural-tensile stress of the three typical asphalt pavement structures(semi-rigid base asphalt pavement,flexible base asphalt pavement and compound base asphalt pavement).The results of the study show that the semi-rigid base asphalt pavement has large bearing capacity and small deformation,but the bottom flexural-tensile stress of the base and subbase is large;the flexible base asphalt pavement has low shearing stress but the whole deformation is large;the mechanical responses of the compound base asphalt pavement are between the semi-rigid base asphalt pavement and flexible base asphalt pavement so that it has a good mechanical advantage.

关 键 词：沥青路面 有限元方法 力学响应 竖向压应力 剪应力 弯拉应力 

分 类 号：U416.217[交通运输工程—道路与铁道工程]