基于细观结构的沥青碎石封层路面力学行为分析

发布时间：2018-05-11 13:51

本文选题：沥青碎石封层 + 细观结构　；参考：《北京工业大学学报》2016年12期

【摘要】：为了认识沥青碎石封层的力学行为与破坏机理,采用有限元软件建立沥青碎石封层细观结构二维有限元模型,分析在竖向荷载作用下封层内部细观结构应力、应变和位移的力学行为特性.分析结果显示:轮迹内侧边缘碎石竖向位移最大,偏转角度最小;相反,轮迹外边缘碎石偏转角度最大,并向两侧逐渐递减.沥青层内的水平应变主要为压应变,轮迹外侧沥青和胶浆层接触面上剪应变最大.黏结层的水平变形、剪切变形均不同程度大于沥青层,黏结层与胶浆层交界处具有最大等效Mises应力,易发生剪切破坏.胶浆层的中心主要为受压变形,胶浆层两侧边缘处主要表现为较高剪切变形.
[Abstract]:In order to understand the mechanical behavior and failure mechanism of asphalt macadam seal layer, a two-dimensional finite element model of meso-structure of asphalt crushed stone seal was established by finite element software, and the stress of meso-structure inside the seal layer under vertical load was analyzed. Mechanical behavior of strain and displacement. The results show that the maximum vertical displacement and the smallest deflection angle are found in the inner edge of the wheel track, but on the contrary, the deflection angle of the stone outside the wheel track is the largest and gradually decreasing to the two sides. The horizontal strain in the asphalt layer is mainly compressive strain, and the shear strain on the contact surface between asphalt and slurry layer is the largest. The horizontal deformation and shear deformation of the bonding layer are more or less than those of the asphalt layer. There is the largest equivalent Mises stress at the interface between the adhesive layer and the mortar layer, and the shear failure is easy to occur. The compression deformation is the main center of the slurry layer, and the high shear deformation occurs at the edge of both sides of the slurry layer.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金资助项目(51108375) 陕西省重点学科建设专项资助项目(E01004)
【分类号】：U416.217

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