柔性道路的应力场显式表达式研究

Study of Stresses Field Explicit Expression on Flexible Pavements

柔性道路的强度与寿命研究为道路领域近几十年来的热点问题,应力分析是进行研究的基础。采用计算机模拟技术,以数值分析方法为途径,利用三维有限元方法和Table Curve工具,借用轴对称弹性半无限空间问题的命题,以简化道路模型为研究对象,得到了柔性路面应力场的显式表达式;经Boussinesq公式验证所建立的公式可用于柔性道路的受力分析和寿命研究。

Tile study on solidity and life of flexible pavement has become the focus in road field in recent decades, which takes stresses analysis as the base. Taking computer simulation as the technology, numerical analyses as the way, 3D finite-element method and Table Curve 3D as the tool, the problem of axis symmetrical elastic semi-infinite space as the proposition, and simplifying the road mode as the study subject, this paper presents the explicit expression of stresses filed in flexible pavelnent.It can be applied in damage evaluation and life prediction of pavelnent uuder traffic loading. The applicability of the proposed approach has been verified by Boussinesqs formula.