摘要
为研究动荷载作用下城市道路沥青混凝土的孔隙率变化规律,根据材料的级配要求,采用离散元软件PFC3D,构建模型试件,并通过编写FISH语言分别对试件施加静荷载和双轴振动荷载,进行测定与数值模拟.研究结果表明:静载和动载作用下孔隙率的变化量都非常小;在短时间作用下,静荷载作用下的孔隙率变化量比振动荷载作用的变化量大.准确把握沥青混凝土在动载作用下的孔隙率变化规律对研究道路路面的耐久性及排水性具有实际意义.
To study the porosity variation of city road asphalt concrete under dynamic load,this paper uses discrete element software PFC3 Dand writes FISH language to build a model specimen according to the requirements of material gradation.And a static load and biaxial vibration load are applied to the specimen respectively.The results show that the variation of porosity is very small under static load and dynamic load,and the variation of porosity under static load is larger than that under vibration load.
出处
《徐州工程学院学报（自然科学版）》
CAS
2017年第1期73-76,共4页
Journal of Xuzhou Institute of Technology(Natural Sciences Edition)
基金
重庆市科学技术委员会科技专项(cstc2015shms-ztzx30004)
关键词
城市道路
动力荷载
孔隙率变化
离散元
city road
dynamic load
porosity variation
discrete element
