沥青路面一维温度应力场的理论计算

沥青路面结构具有明显的粘弹性力学行为,并可以将其视为位于自然界中的一个系统。为了分析周围环境子系统对沥青路面结构力学行为的影响,本文着眼于沥青路面低温缩裂的发生机理,在建立路面结构温度场理论模式的基础上,依据沥青混合料松弛本构关系的数值逼近结果,建立了沥青面层温度应力松弛过程中温度应力场依时变化的数值计算模型。

The Analysis of One-dimension Thermal Stress Field in Bituminous Pavement

The bituminous pavement structure has obvious mechanics character of visco-elastic and it can be considered as a field in natural world.In order to ana- lyze the effects of the branch field of surrounded environment on the mechanics charac- ter of bituminous pavement structure,this paper is based on the producing principle of low temperature shrinkage crack in bituminous pavement.First,the theory model of temperature field in pavement constructure is built.Second,the numerical valve of approaching is obtained from relaxation corresponding relation of bituminous mix- tures.Finally,according to the aforementioned content,the numerical valve calcula- tion model has been established in which temperature stress field varies with time during the course of temperature-stress relaxation in bituminous pavement.