摘要
沥青混合料由沥青结合料、集料和空隙构成,在离散元模型中的数字重构包括沥青结合料的重构、集料的重构和混合料的重构。以二维圆形颗粒对不同组分指定相应的接触特性,以反映各组分的力学机理,从微观角度给出了沥青混合料的结合特性,并利用离散元方法生成3种具有代表性空隙率的沥青混合料微观模型,以颗粒间的接触力矢量反映不同沥青混合料的骨架变化。
Asphalt mixture is composed of asphalt binder, aggregate and air voids, then the digital reconstruction includes the reconstructions of asphalt binder, aggregate and mixture in discrete element model. In this paper, different components are specified corresponding contact characteristics by two-dimension circular particles to reflect the mechanical mechanism of different components and the cohesion properties of asphalt mixture from microscopic angle are given. In addition, three microscopic models of asphalt mixture are generated with representative air void content by discrete element method and the contact force vectors between particles are used to reflect the
出处
《公路》
北大核心
2010年第2期118-123,共6页
Highway
基金
国家自然科学基金项目
基金编号50608006
关键词
沥青混合料
沥青结合料
集料
离散元方法
数字重构
asphalt mixture
asphalt binder
aggregate
skeleton changes of different asphalt mixtures. discrete element method
digital reconstruction
