沥青路面黏弹性反问题的三维有限元分析  

3D Finite Element Analysis on the Inverse Viscoelasticity Problem of Asphalt Pavement

作　　者：彭妙娟[1] 储楷风 PENG Miao-juan;CHU Kai-feng(Department of Civil Engineering, Shanghai University, Shanghai 200444,China)

机构地区：[1]上海大学土木工程系,上海市200444

出　　处：《公路》2019年第3期1-10,共10页Highway

基　　金：国家自然科学基金委员会-中国民航局民航联合基金资助项目;项目编号U1433104

摘　　要：采用黏弹性理论,利用ABAQUS有限元软件,建立了沥青路面黏弹性反问题的三维有限元模型,基于足尺路面试验环道的FWD落锤式弯沉仪的动力荷载试验结果,对两种沥青路面结构进行了黏弹性反算模量的计算,并对三维沥青路面黏弹性反问题的反算模量计算结果和二维沥青路面黏弹性反问题的反算模量计算结果进行了比较。结果表明:建立的三维黏弹性反问题的有限元模型,其反算模量计算结果正确,相比二维模型的计算结果,误差较小;将反算计算结果替换原始模型中的初始模量,各测点计算弯沉值与实测弯沉值较吻合。By using the viscoelastic theory and finite element ABAQUS software,the 3D finite element model of the viscoelastic inverse calculation modulus for the general Maxwell model of asphalt pavement is established.Based on the dynamic load test results of Falling Weight Deflector of full-scale pavement test circuit,and the viscoelastic inverse calculation modulus of two kinds of asphalt pavements are calculated.The results of the inverse viscoelasticity problem of 3D asphalt pavement with these of 2D asphalt pavement are compared.The research results show that it is reliable to calculate the inverse viscoelasticity problem of asphalt pavement by using the 3D viscoelasticity finite element model.The calculation results of the inverse problem are correct.When the inverse calculation results replace the initial modulus of the original model,it’s found that the matching degree between calculated deflection basin and measured deflection basin is good,and the calculated deflection value is in compliance with the measured deflection value.Compared the calculation results of the inverse viscoelasticity problem of 3D asphalt pavement with that of 2D asphalt pavement,it’s found the error of the inverse problem calculation results of the 3D model is less than that of the 2D model.

关 键 词：道路工程 反算模量 黏弹性理论 FWD落锤式弯沉仪 有限元法 三维沥青路面 

分 类 号：U416.217[交通运输工程—道路与铁道工程]