沥青路面损伤对结构振动影响的有限元分析  

Finite Element Analysis of the Influence of Asphalt Pavement Damage on Structural Vibration

作　　者：徐骁龙 刘志胜 蔡氧 金辰 蒋宏 XU Xiao-long;LIU Zhi-sheng;CAI Yang;JIN Chen;JIANG Hong(Shanghai Urban Construction Design&Research InstituteCo.,Ltd.,Shanghai 200125,China;Key Laboratory of Road&Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《中国市政工程》2023年第5期85-88,125,126,共6页China Municipal Engineering

基　　金：交通部重点科技项目(2020-ZD3-025)。

摘　　要：沥青路面的振动特征可以反映结构损伤状况。采用有限元软件建立3D数值分析模型,模拟沥青路面面层与路基模量衰减、层间接触弱化等结构损伤状态,分析在标准轴载激励下,沥青路面的模态频率和位移、加速度响应的变化规律。结果表明:路基模量下降会使模态频率均匀下降;层间接触劣化对高阶频率的影响更明显。路基模量下降会导致加速度总幅值降低,中、下面层模量下降会使加速度幅值上升。研究结果对基于振动的沥青路面结构损伤识别有参考意义,也有待于进一步通过实际观察验证。The vibration characteristics of asphalt pavement can reflect the structural damage status.A 3D numerical analysis model is established using finite element software to simulate structural damage states such as modulus attenuation of the asphalt pavement surface and subgrade,and interlayer contact weakening.The variation laws of modal frequency,displacement,and acceleration response of the asphalt pavement under standard axle load excitation are analyzed.The results show that the decrease in subgrade modulus will result in a uniform decrease in modal frequency;the deterioration of interlayer contact has a more significant impact on highorder frequencies.The decrease in subgrade modulus will lead to a decrease in the total amplitude of acceleration,while the decrease in the modulus of the middle and lower layers will lead to an increase in the amplitude of acceleration.The research results have reference significance for the identification of structural damage of asphalt pavement based on vibration,and need to be further verified through practical observation.

关 键 词：沥青路面 结构振动分析 模量下降 层间接触弱化 

分 类 号：U416.2[交通运输工程—道路与铁道工程]