高温重载作用下沥青路面结构力学响应分析

为研究高温重载耦合作用下沥青路面结构力学响应特点,采用ANSYS软件定量分析了高温重载交通对沥青路面路表弯沉和结构应力的影响规律。分析结果表明:1)路面弯沉与轴载呈正线性相关,高温环境中,竖向位移最大值随轴载的增加而增大;2)高温重载作用下,结构应力均有增长,面层拉应力比基层拉应力增幅更明显,但高温对压应力增幅影响不显著,常温中面层剪应力最大;高温超限100%条件下,面层压应力为常温标准轴载的2倍,面层剪应力为标准轴载的2.21倍。

Mechanical Response Analysis of Asphalt Pavement Structure under the Condition of High Temperature and Heavy-loaded

To analyse the characteristics of mechanical response of asphalt pavement structure under the coupling actions of high temperature and over-loaded,the changed discipline of asphalt pavement surface deflection and structure stresses under the high temperature and heavy-loaded traffic was discussed by Ansys software in this paper.The research results show that the surface is performed positive linear correlation with axle-loaded,the increase rate of the maximum vertical displacement accompanied with axle-loaded is improved in the high temperature environment;in the condition of high temperature and over-loaded,the structure stresses is increased.The increase rate of surface layer tensile stress is more obvious than the base layer tensile stress,the role of temperature for the compressive stress increasing is not obvious,the maximum shear stress is in the surface layer;under the condition of high temperature and100%overrun,the surface compressive stresses is increased by one time compared with normal temperature and standard axle-load,the surface shear stresses is increased by 2.21 times compared with normal temperature and standard axle-load.