摘要
针对7种典型沥青混凝土路面结构,采用建立的三维有限元模型,分析了路基路面在不同轴载和轴型作用下的力学响应,并统计了路基路面力学响应量的分布和大小。结果表明：面层弯沉分布范围为45-200（0.01mm）,基层层底拉应力的分布范围为44-207kPa,底基层层底拉应力的分布范围为54-306kPa,垫层层底拉应力的分布范围为9-139kPa;路基工作区深度范围内的主应力范围为20〈σ1〈110kPa,0〈σ3〈60kPa,路基主应力比主要集中在1.8-6.0之间,路基顶面压应变主要集中在233-800με之间。
3D finite element models for 7 typical asphalt pavement structure is established to analyze the mechanical response of subgrade and pavement at different load stress and configurations, and the statistics of distribution and size of the mechanical response. The results indicate that the distribution of surface deflection is 45-200 （0.01 ram）, the base layer bottom tensile stress is 44-207 kPa, the subbase layer bottom tensile stress is 54-306 kPa and the bed layer bottom tensile stress is 9-139kPa; in the depth range of subgrade work area, the maximum and minimum principal stress range in 20-110 kPa and 0-60 kPa respectively, the principal stress ration is mainly concentrated in 1.8-6.0 and the compressive strain on the top of subgrade mainly in 230-800με.
出处
《公路》
北大核心
2015年第8期21-26,共6页
Highway
基金
交通运输部科技项目,项目编号2011318493720
中央高校基本科研业务费专项资金资助,项目编号2682013CX040
关键词
沥青混凝土路面
力学响应
有限元分析
应力分布
asphalt pavement
mechanical response
finite element analysis
stress distribution
