沥青路面非均布荷载下层间接触条件不同时力学响应的三维有限元分析

Stress Response Analysis of Asphalt Pavement with Different Interlayer Touch Types under Non-uniform Distributed Tire Pressure Through 3D Finite Element Method

轮胎与路面的接地形状呈较明显的矩形,且随着轮胎负荷及胎压的不同,对路面的作用力也发生不规则变化,呈现出非均匀分布。本文采用三维有限元分析方法,分析柔性基层和半刚性基层路面结构的层间接触条件不同时,在不同的车型荷载及其不同的荷载分布情形下路面结构应力响应的差异。分析结果显示,不同的层间接触条件会对沥青路面结构的力学响应产生很大的影响。

The contact shape between tire and road surface is similar to a rectangle, and the pressure changes irregularly with non-uniform distribution depending on different tire load and pressure. In this paper, a three dimensional finite element analysis method is used to analyze the difference of the mechanics response under different vehicles and different loading with different interbedded touch types in asphalt pavement of simi-rigid base layer and flexible base layer. As analysis results show, the stress response of asphalt pavement structure is very different with the different interbedded touch types.