钢桥面沥青混合料铺装体系黏弹性力学响应分析

Analysis of Viscoelastic Responses of Asphalt Mixture Pavements of Steel Bridge Deck

常用为钢桥面铺装层的沥青混合料是一种典型的黏弹性材料,任何一个时刻的力学响应不仅和该时刻的加载条件有关,而且和结构所经历的加载历史有关。运用沥青混合料黏弹性分析的基本方法,对三种常用钢桥面铺装材料在不同温度下的应力应变及挠度变化规律进行分析,并进行了加卸载条件下铺装层的黏弹性响应分析,为进一步了解和掌握钢桥面铺装层开裂、车辙、疲劳等破坏问题的机理提供相应的依据。

Asphalt mixtures for the pavement material on the steel-deck are typical viscoelastic materials, mechanical response corresponds with load condition and load history at any time. Viscoelastic responses of three different asphalt compands are analysed on the steel-deck on different temperatues detailedly based on viscoelastic mechanic theory of asphalt pavement and analysed viscoelastic mechanical response in loading-unloading conditions, provides foundation for analysis of crack, rut and fatigue of asphalt pavement on steel-deck.