摘要
基于数字图像技术与有限元分析方法,分析半柔性路面材料内部薄弱部位的极限应力状态。研究结果表明,水泥胶砂的收缩变形是造成半柔性路面材料内应力的主要因素;母体沥青混合料的空隙率越大,材料内部拉应力集中部位的数量越多。本研究确定了水泥胶砂的变形控制指标,为半柔性材料的合理设计提供理论依据。
The differences in deformation characteristics between rigid and flexible components are fundamental factors that affect the overall properties of semi-flexible pavement material.On the basis of digital image processing technology and finite element analysis method,the internal weak parts of semi-flexible material were analyzed.Results indicate that the shrinkage deformation of cement mortar is the main factor that influences the internal stress of the semi-flexible material.The larger the porosity of asphalt mixture is,the more the number of stress concentrations appear.This study determined the deformation control index of cement mortar to provide a theoretical basis for the rational design of semi-flexible material.
作者
蔡旭
张顺先
黎侃
CAI Xu ZHANG Shunxian LI Kan(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China Guangdong Provincial Changda Highway Engineering Co. , Ltd, Guangzhou 510000, China School of Civil and Transportation Engineering, South China University of Technology ,Guangzhou 510641 ,China)
出处
《太原理工大学学报》
北大核心
2017年第4期652-656,共5页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(51378224)
广东省自然科学基金资助项目(2014A030310272)
关键词
道路工程
半柔性材料
有限元分析
内部极限应力
road engineering
semi-flexible material
Finite Element Analysis
internal ultimate stress
