Finite Element Modeling and Parametric Analysis of Pavement Dynamic Responses under Moving Vehicle Load  

移动车辆荷载作用下道面动态响应的有限元模型和参数分析

作　　者：LIU Xiaolan ZHANG Xianmin 刘小兰;张献民(天津城建大学土木工程学院,天津300384;南京航空航天大学民航学院,南京211106;中国民航大学机场学院,天津300300)

机构地区：[1]Civil Engineering College,Tianjin Chengjian University,Tianjin 300384,P.R.China [2]College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,P.R.China [3]College of Airport Engineering,Civil Aviation University of China,Tianjin 300300,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2020年第3期490-500,共11页南京航空航天大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51178456)。

摘　　要：This paper intends to develop finite element models that can simulate vehicle load moving on pavement system and reflect the pavement response of vehicle and pavement interaction.We conduct parametric analysis considering the influences of asphalt concrete layer modulus and thickness,base layer modulus and thickness,and subgrade modulus on pavement surface displacement,frequency,and strain response.The analysis findings are fruitful.Both the displacement basin width and maximum value of dynamic surface displacements are larger than those of static surface displacements.The frequency is positively correlated with the pavement structure moduli,and negatively correlated with the pavement structure thicknesses.The shape of dynamic and static tensile strain is similar along the depth of the pavement structure.The maximum value of dynamic tensile strain is larger than that of static tensile strain.The frequency of entire pavement structure holds more significant influence than the surface displacement and strain do.The subgrade modulus has a significant effect on surface displacement,frequency and strain.为建立能够模拟车辆动荷载作用于道面的有限元模型,进而较为真实的反映车辆和道面的相互作用时道面的响应,分析了沥青面层模量和厚度、基层模量和厚度,以及路基模量对路表弯沉、频率和应变的影响规律。分析结果表明:动态路表弯沉的弯沉盆宽度和最大值均大于静态路表弯沉;频率与道面结构模量正相关,与道面结构厚度负相关;道面结构不同深度处动态和静态拉应变的形状相似;动态拉应变的最大值大于静态拉应变。整个道面结构的频率响应比路表弯沉和应变响应更显著。路基模量对路表弯沉、频率和应变具有显著影响。

关 键 词：pavement dynamic response vehicle load surface displacement FREQUENCY STRAIN 

分 类 号：U416[交通运输工程—道路与铁道工程]