考虑层间接触状态的沥青路面力学性能分析  

Mechanical Properties Analysis of Asphalt Pavement Considering Interlayer Contact State

作　　者：呙润华[1] 张海虎 GUO Run-hua;ZHANG Hai-hu(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;College of Civil Engineering and Architecture,Xinjiang University,Urumqi 830047,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]新疆大学建筑工程学院,乌鲁木齐830047

出　　处：《科学技术与工程》2022年第25期11203-11211,共9页Science Technology and Engineering

基　　金：清华大学-丰田联合研究院跨学科专项(20203910013)。

摘　　要：为了研究不同层间接触状态的沥青路面力学性能,借助ABAQUS构建路面三维有限元模型分析了路面温度场下不同的层间接触状态对路面力学性能的影响,并建立了考虑层间接触状态的疲劳性能预估模型。研究表明:当深度路面在0.68 m以上,路面温度与深度呈三次多项式关系、路面深度在0.1 m以上时,路面温度与外界环境气温呈二次多项式关系;层间接触状态对沥青路面拉应力影响最大,剪应力次之,对竖向变形影响最小,低速、重载的车辆能使路面最大拉应力、最大剪应力、最大竖向位移分别增大90.0%、70.0%、63.2%;与完全连续状态相比,随着层间接触状态的劣化,沥青路面的疲劳寿命最大降低了75.6%。可见为延长路面的使用寿命,施工时应连续铺装压实,严格控制层间黏结质量。In order to study the mechanical properties of asphalt pavement with different interlayer contact states,a three-dimensional finite element model of pavement was established to analyze the influence of different interlayer contact states on the mechanical properties under the temperature field.And a fatigue performance prediction model was established considering the interlayer contact states.The results show that when the depth of pavement is above 0.68 m,the relationship between pavement temperature and depth is a cubic polynomial,and when the depth of pavement is above 0.1 m,the relationship between pavement temperature and ambient temperature is a quadratic polynomial.The maximum tensile stress,maximum shear stress,and maximum vertical displacement of asphalt pavement can be increased by 90.0%,70.0%,and 63.2%by vehicles with low speed and heavy load,respectively.Compared with the complete continuous state,the fatigue life of asphalt pavement is reduced by 75.6%with the deterioration of the interlayer contact state.To prolong the service life of pavement,continuous pavement compaction should be carried out during construction,and the bonding quality between layers should be strictly controlled.

关 键 词：道路工程 沥青路面 层间接触状态 数值模拟 力学性能 

分 类 号：U416.2[交通运输工程—道路与铁道工程]