基层结构参数对沥青混凝土路面力学响应的影响分析

Analysis of Influence of Base Structural Parameters on Mechanical Response of Asphalt Concrete Pavement

基于有限元软件ABAQUS,建立沥青混凝土路面结构三维有限元模型,分析了基层结构参数对沥青混凝土路面力学响应的影响。揭示了基层厚度、基层模量和基层与面层或底基层接触条件变化,对路表弯沉、面层层底拉应力和基层层底拉应力等路面力学响应量的影响规律;结合正交试验,提出了在基层结构参数中,路表弯沉受基层厚度影响显著,面层层底拉应力受基层与面层之间的接触条件影响最为显著,基层层底拉应力受基层模量影响显著。

Based on ABAQUS software,a 3D finite element model is established to analyze the influence of base structural parameters on mechanical response of asphalt concrete pavement.Surface deflection,bending stress in the bottom of surface and base varied with base thickness,base modulus and contact status between base and surface or subbase are presented.The sensitivity analysis of base structural parameters are applied using orthogonal tests,and the results indicate that surface deflection is significantly affected by base thickness,and bending stress in the bottom of surface is most significantly affected by contact status between base and surface,and bending stress in the bottom of base is significantly affected by base modulus.