车轮荷载作用下沥青混凝土路面车辙有限元分析  

The finite element analysis on asphalt concrete pavement ruts under wheel load

作　　者：谷喜权 Gu Xiquan(Wuhan Lutong Municipal Engineering Quality Inspection Center Co.,Ltd.,Wuhan Hubei 430010,China)

机构地区：[1]武汉路通市政工程质量检测中心有限公司,湖北武汉430010

出　　处：《山西建筑》2025年第9期119-123,共5页Shanxi Architecture

摘　　要：为了提高有限元车辙预测模型的准确性,评估车辆参数(车轮组、车速、轮压)对车辙的影响,本研究建立了三维路面模型。该模型采用移动轮载对路面进行重复加载,并采用应变硬化模拟沥青混合料的蠕变规律。结果表明,车辆前轮组(单轴单轮)荷载对路面车辙的影响与后轮组(单轴双轮)同等重要。车辆后轮组考虑双轴双轮荷载比单轴双轮更容易引起路面车辙,双轴双轮荷载使路面车辙增加33%,且低速行驶的车辆也会大大增加路面车辙,当轮载运动速度从80 km/h降低到60 km/h时,车辙量增加了60%。过高的轮压造成相当大的凹陷,当轮压从0.70 MPa增加到0.90 MPa时,路面最大凹陷增大7%。所得结论可为沥青混合料的路面设计和抗剪设计提供参考。In order to improve the accuracy of finite element rutting prediction model and evaluate the influence of vehicle parameters(wheel group,vehicle speed,wheel pressure)on rutting,this study established a threedimensional road surface model.This model uses mobile wheel loads to repeatedly load the road surface and simulates the creep behavior of asphalt mixtures through strain hardening.The results indicate that the influence of the front wheel group(single axle single wheel)load on road ruts is equally important as that of the rear wheel group(single axle double wheel).Considering that dual axle dual wheel loads are more likely to cause road ruts than single axle dual wheel loads of the rear wheel group,the dual axle dual wheel loads increase road ruts by 33%,and lowspeed vehicles also greatly increase road ruts,when the wheel load movement speed decreases from 80 km/h to 60 km/h,the amount of ruts increases by 60%.Excessive wheel pressure causes significant potholes,and when the wheel pressure increases from 0.70 MPa to 0.90 MPa,the maximum pothole on the road surface increases by 7%.The conclusions drawn can provide reference for the pavement design and shear design of asphalt mixtures.

关 键 词：车辙 移动车轮载荷 有限元 应变硬化 

分 类 号：TU997[建筑科学—市政工程] U416.2[交通运输工程—道路与铁道工程]