级配碎石基层非线性对沥青路面结构受力的影响

发布时间：2019-08-20 10:41

【摘要】：目的基于级配碎石基层材料的非线性特征,研究级配碎石上基层沥青路面结构力学响应规律,进而为该种路面结构设计提供理论依据.方法通过ABAQUS有限元软件的二次开发,运用Fortran语言对级配碎石非线性本构模型进行编译,建立级配碎石上基层沥青路面结构的有限元模型.结果随级配碎石层和面层厚度的增加,级配碎石非线性沥青路面结构各结构层所受层底拉应力较级配碎石线弹性沥青路面结构都有所增加,路表弯沉变化不大.推荐在中等级交通下的面层厚度为7~15 cm,级配碎石层厚度为10~15 cm.结论应用该种路面结构时,考虑到级配碎石层非线性对该路面结构受力产生的不利影响,必须确定合理的级配碎石层和面层厚度.
[Abstract]:Objective To study the mechanical response of the asphalt pavement structure on the graded broken stone based on the non-linear character of the graded crushed stone base material, so as to provide the theoretical basis for the structural design of the pavement. Methods Based on the second development of the ABAQUS finite element software, the non-linear constitutive model of the graded broken stone was compiled by the Fortran language, and the finite element model of the asphalt pavement structure on the graded broken stone was established. As a result, with the increase of the thickness of the graded broken stone layer and the surface layer, the structure of the layer bottom tensile stress of the graded broken stone non-linear asphalt pavement structure is increased compared with that of the graded broken stone line, and the change of the road surface deflection is not large. It is recommended that the thickness of the surface course under the medium-grade traffic is 7-15 cm, and the thickness of the graded broken stone layer is 10-15cm. Conclusion When the pavement structure is applied, considering the adverse effect of the non-linearity of the graded broken stone layer on the stress of the pavement structure, it is necessary to determine the reasonable gradation and the thickness of the surface layer.
【作者单位】：沈阳建筑大学土木工程学院;
【基金】：国家自然科学基金项目(51078242) 辽宁省交通厅重点科研项目(200914)
【分类号】：U416.217

【参考文献】