重载和水平力作用对沥青路面使用性能的影响  

Influence of Heavy Load and Horizontal Force on the Performance of Asphalt Pavement

作　　者：宁金成[1] 曹帅 杨庆国[2] NING Jincheng;CAO Shuai;YANG Qingguo(Henan College of Transportation,Zhengzhou 450005,China;Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]河南交通职业技术学院,郑州450005 [2]重庆交通大学,重庆400074

出　　处：《河南科学》2020年第10期1612-1617,共6页Henan Science

基　　金：河南省交通运输厅科技项目(2017B1)。

摘　　要：利用ABAQUS有限元分析软件,采用弹性本构模型表征沥青混合料材料的材料性质,结合现行的沥青路面设计规范,分析了重荷载和水平力对沥青路面使用性能的影响.结果表明,水平力对弯沉的影响较小,可以忽略不计;在重载和行车方向水平力的作用下,上面层底的拉应变明显增大,在重荷载和离心力方向上水平力的作用下,中面层底的拉应变明显增大,且无论哪种水平力的作用,拉应变在水平力背向一侧的车轮荷载边缘取得最大值;在重荷载和水平力的共同作用下上面层产生拥包、推移和车辙的原因由两部分组成,其一为竖向力作用下中面层产生的剪应力向上传递,其二为水平力作用使得上面层产生的剪应力影响.Using ABAQUS finite element analysis software,the elastic constitutive model was used to characterize the material properties of asphalt mixture materials.Combined with the current asphalt pavement design specifications,the effects of heavy load and horizontal force on the performance of asphalt pavement were analyzed.The results show that the horizontal force has little effect on the deflection and can be neglected.Under the action of the horizontal force of heavy load and driving direction,the tensile strain of the upper layer is obviously increased,and the horizontal force is applied in the direction of heavy load and centrifugal force.The tensile strain at the bottom of the middle layer is obviously increased,and regardless of the horizontal force,the tensile strain gets the maximum value at the wheel load edge of the horizontal force back to one side.The reasons for the upper layer to generate the clump,the shift and the rut under the combined action of the heavy load and the horizontal force are including two parts,one is the upward transfer of the shear stress generated by the middle layer under the vertical force,and the other is the horizontal force acting to affect the shear stress generated by the upper layer.

关 键 词：沥青路面 有限元 重载 水平力 路面使用性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]