重载条件下沥青路面结构力学响应分析

发布时间：2018-06-19 21:03

本文选题：沥青路面 + 重载　；参考：《公路工程》2015年06期

【摘要】：分析淮海经济区典型沥青路面结构在重载交通条件下的力学响应,为该地区合理设计路面结构提供参考。设定5个荷载等级,采用ABAQUS软件计算2种典型结构的弯沉、压应力、层底拉应力和剪应力,并分析其分布特性及随轴载的变化规律。结果表明:路表弯沉、压应力在Y向呈W型分布,峰值位于当量圆圆心处;沥青面层各层层底均受压,Y向呈W型分布,峰值出现在当量圆圆心,基层和底基层均受拉,Y向呈倒U型分布,峰值出现在轮隙中心;距路表0~2 cm深度处,剪应力在轮边缘有应力集中现象,峰值出现在轮边缘,距路表7~15 cm深度处,剪应力应力集中现象不太明显,最大剪应力分布在当量圆圆心附近;随着轴载的增加,路面结构力学响应均随之增加。
[Abstract]:The mechanical response of typical asphalt pavement structure in Huaihai Economic Zone under heavy traffic conditions is analyzed, which provides a reference for the reasonable design of pavement structure in this area. Five load grades were set up and the deflection, compressive stress, bottom tensile stress and shear stress of two typical structures were calculated by Abaqus software, and their distribution characteristics and variation law with axial load were analyzed. The results show that the road surface is curved, the compressive stress is W-shaped in Y direction, the peak value is located at the center of equivalent circle, and all layers of asphalt layer are distributed in W-shaped direction under compression at the bottom of each layer, and the peak value appears in the equivalent circular center. The peak value appeared in the center of the wheel gap, and the shear stress was concentrated at the edge of the wheel at a depth of 2 cm from the road surface, and the peak value appeared at the wheel edge and at the depth of 715 cm from the surface of the road. The phenomenon of shear stress concentration is not obvious, the maximum shear stress is distributed near the equivalent circle center, and the mechanical response of pavement structure increases with the increase of axial load.
【作者单位】：徐州市交通规划设计研究院;
【分类号】：U416.217

【共引文献】