SMA粗集料结构的数值模拟  

Numerical Simulation of Coarse Aggregate Skeleton of Stone Matrix Asphalt

作　　者：陆阳[1] 周永江[2] 张蓉[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省交通厅公路规划勘测设计研究院,四川成都610041

出　　处：《中国公路学报》2006年第1期38-41,46,共5页China Journal of Highway and Transport

摘　　要：针对沥青玛蹄脂碎石混合料(SMA)特有的骨架结构特点,采用蒙特卡罗方法随机生成集料颗粒,并按相容条件进行混合料骨架集成。根据此原理,以VC++为平台,开发出离散球体堆积计算程序,并将该程序应用于SMA16骨架微观结构模拟分析,同时就骨架间隙率、配位数对结构边界约束条件及混合料级配的敏感性问题进行了讨论。结果表明:由计算机模拟的SMA骨架结构与实际情况接近,对集料配合比设计具有参考价值。Stone matrix asphalt （SMA） is characterised by its coarse aggregate skeleton,which is particle size and grade dependent. While the aggregates can be positioned randomly within the mixture, arrangement of a certain particle is related to those of the surrounding aggregates. To build the skeleton, coarse aggregates generated by Monte Carlo method were filled with the given space according to the rule of compatibility. A computer program of this procedure was developed on the platform of VC＋ ＋, with which micro-structure of SMA16 was simulated and analyzed. Sensitivities of the skeleton porosity and the particle coordination number to the sample boundaries and aggregate grade was also discussed in this paper. The results show that the skeleton of SMA simulated by computer is approach to reality, which provides reference for aggregate proportion.

关 键 词：道路工程 SMA 数值模拟 粗集料骨架 蒙特卡罗方法 

分 类 号：U414.1[交通运输工程—道路与铁道工程]