超载下半刚性基层沥青路面结构有限元分析  

Finite Element Analysis of Asphalt Pavement Structure with Semi-rigid Base Under Overload

作　　者：王刚 张银博 WANG Gang;ZHANG Yinbo(Pacific Construction Group Limited, Urumqi 830000, China;Xinjiang Communications Construction Group Co.Ltd., Urumqi 830000, China)

机构地区：[1]太平洋建设集团有限公司,乌鲁木齐830000 [2]新疆交通建设集团股份有限公司,乌鲁木齐830000

出　　处：《武汉理工大学学报（交通科学与工程版）》2020年第3期579-583,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：文中通过ANSYS有限元软件建立道路三维有限元模型,考虑超载作用下,半刚性基层厚度和弹性模量在一定梯度变化情况时,道路各结构层层底力学响应情况,分析半刚性沥青路面结构各项力学响应量,并预估了不同路面结构形式下路面使用寿命.结果表明:结构层底部的拉应力或拉应变与路面结构疲劳寿命直接相关.在考虑车辆超载作用下,研究区域典型路面结构疲劳寿命较短.为了保证路面长期使用性能,进行路面设计时应选择在合理范围内增加基层厚度,防止基层与底基层所受水平拉应力过大,过早出现基底裂缝.In this paper,the three-dimensional finite element model of the road wasestablished by ANSYS finite element software.Considering the change of thickness and modulus of elasticity of semi-rigid base under certain gradient,the mechanical response of the bottom of each layer of road structure was analyzed,and the service life of pavement under different pavement structures was predicted.The results show that the tensile stress or strain at the bottom of the structural layer is directly related to the fatigue life of the pavement structure.Considering the overload of vehicles,the fatigue life of typical pavement structures in the study area is relatively short.In order to ensure the long-term performance of the pavement,we should choose to increase the thickness of the base in a reasonable range to prevent the excessive horizontal tension stress of the base and the base from premature occurrence of base cracks.

关 键 词：超载 半刚性沥青路面 路面结构形式 有限元分析 疲劳寿命 

分 类 号：U416.217[交通运输工程—道路与铁道工程]