沥青玛蹄脂混合料矿料骨架构成及其接触特性  

Aggregate skeleton composition of stone mastic asphalt and its contact properties

作　　者：张东[1] 黄晓明[2] 赵永利[2] 

机构地区：[1]南京工业大学交通学院,南京210009 [2]东南大学交通学院,南京210096

出　　处：《吉林大学学报（工学版）》2015年第2期394-399,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51178112)

摘　　要：通过建立沥青玛蹄脂混合料SMA-13三维离散元模型,研究了SMA-13的矿料骨架构成及其接触特性。利用PFC3D中的FISH语言编制用户子程序,提取了不同粒径集料(>2.36mm)之间的接触力。在统计大量数据的基础上,分析了各粒径集料在SMA-13中的作用和各粒径集料自身之间以及与其他粒径集料之间的接触特点。研究表明:在SMA-13中,13.2、9.5和4.75mm集料相互接触构成骨架,承担大部分荷载,而2.36mm集料主要填充骨架的空隙,承担小部分荷载;并且9.5mm集料和4.75mm集料是构成集料骨架的主体,承担60%左右的荷载。The aggregate skeleton composition of the stone mastic asphalt with the nominal maximum aggregate size of 13.2mm（SMA-13）and its contact properties were studied using a three-dimensional discrete element method.A user-writing program was coded with FISH language to extract the contact forces in different sized aggregates（〉 2.36mm）.The roles of different sized aggregates and the contact properties between these aggregates were investigated based on the statistical analysis of large amount of data.The results of the study show that aggregates with sizes of 13.2mm,9.5mm and 4.75 mm form the aggregate skeleton of SMA-13,while 2.36 mm aggregates mainly fill the voids of the skeleton.Furthermore,aggregates of sizes 9.5 mm and 4.75 mm are the main body of the skeleton,which bear nearly 60% of the vehicle load on asphalt pavement.

关 键 词：道路工程 沥青混合料 矿料骨架 离散元 接触力 

分 类 号：U416[交通运输工程—道路与铁道工程]