沥青路面在半正弦荷载下的力学响应

发布时间：2018-03-08 00:03

本文选题：沥青路面　切入点：力学响应　出处：《武汉科技大学学报》2017年06期 　论文类型：期刊论文

【摘要】：研究轮胎/路面的接触印迹特征及随机荷载作用特点,采用ABAQUS软件构建路面结构三维有限元模型,对半正弦荷载作用下的沥青路面力学响应进行分析。结果表明,半正弦荷载作用下沥青路面的上面层和中面层出现应力应变集中,应力应变值随路面深度的增加而逐渐减小;沥青路面的竖向、横向及纵向应力最大值均出现在上面层,且竖向应力最大,横向应力次之,纵向应力最小;竖向、横向应变最大值出现在上面层,纵向应变最大值出现在上-中面层,且路面结构内部出现反复的纵向拉-压变形,这很可能是沥青路面轮迹带附近材料产生疲劳损坏的根本原因。另外,荷载作用时间和路面温度对沥青路面应变的影响要大于其对应力的影响,路面温度的升高导致应变增大且延迟了残余应变的恢复时间。
[Abstract]:The contact imprinting characteristics and random load characteristics of tire / pavement are studied. The three-dimensional finite element model of pavement structure is constructed by ABAQUS software, and the mechanical response of asphalt pavement under semi-sinusoidal load is analyzed. Under the action of semi-sinusoidal load, the stress and strain concentration appears in the upper layer and the middle surface of asphalt pavement, and the stress and strain value decreases gradually with the increase of pavement depth, and the maximum values of vertical, transverse and longitudinal stresses of asphalt pavement appear in the upper layer. The vertical stress is the largest, the transverse stress is the second, the longitudinal stress is the smallest, the vertical, transverse strain maximum appears in the upper layer, the longitudinal strain maximum appears in the upper and middle surface layer, and the repeated longitudinal tension-compression deformation occurs inside the pavement structure. This may be the root cause of fatigue damage of materials near the track band of asphalt pavement. In addition, the effect of loading time and pavement temperature on the strain of asphalt pavement is greater than that of its corresponding force. The increase of pavement temperature leads to the increase of strain and delays the recovery time of residual strain.
【作者单位】：武汉科技大学汽车与交通工程学院;
【基金】：国家自然科学基金资助项目(51578423);国家自然科学基金青年科学基金资助项目(51508428)
【分类号】：U416.217

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