Abstract: In th is paper,the in portance of nonlinear analysis in the strucral desgn of flexible pavement isanalysed,The nonlinear anal ysis methed for the structural design of fle-xible pavement and stress-de-pendent model on the resi-lient modu li of granular base course and subgradpnd soil materials are dis-cussed.Fu rthermore,the shortcom ings in the ex isting models are also discussed.

Key words: flexible pavenlent, structural deeign, nonlinear analysis, constitutive model

摘要： 本文分析认为，公路、城市道路路面及机场道路路面中的土基和粒料类基（垫）层材料呈现出弱、粘、塑性性质，其应力──应变关系通常是非线性的，因而柔性路面设计必须考虑非线性问题。文中对柔性路面非线性分析方法及材料回弹模量的应力依赖性模型进行了讨论，特别是对现有模型中存在的问题进行了剖析。

关键词: 柔性路面设计, 非线性分析, 本构模型