| 基于图像技术的沥青混合料细观损伤演化研究 |
| |
| 引用本文： | 蒋泽中,张华,谢涛,邱延峻.基于图像技术的沥青混合料细观损伤演化研究[J].公路交通科技,2009,26(2). |
| |
| 作者姓名： | 蒋泽中 张华 谢涛 邱延峻 |
| |
| 作者单位： | 1. 西南交通大学,土木工程学院,四川,成都,610031
2. 贵州大学,土木建筑工程学院,贵州,贵阳,550022 |
| |
| 基金项目： | 高等学校博士学科点专项科研基金 |
| |
| 摘 要： | 借助于CT图像技术，以AC20、SMA16、ATB25混合料为试验研究对象，从细观角度对沥青混合料单轴压缩条件下的损伤演化规律进行了探讨。研究结果表明：在混合料损伤演化过程中，空隙对试件的变形起着控制作用；加载速度对内部裂纹的扩展速率和发育程度有重要的影响；温度对混合料的极限强度和裂纹扩展行为有显著影响；内部CT数等值线与外部同值等值线的连通可以作为启裂位置和损伤产生的判据。体应变为0的应力阶段所对应的损伤值可作为损伤门槛值，且损伤分维数与应力之间呈非线性关系，并随着损伤的演化发展逐渐增加。
|
| 关 键 词： | 道路工程 沥青混合料 CT 细观损伤 损伤门槛值 分维数 |
Research on Meso-damage Evolution of Asphalt Mixtures Based on Image Technology |
| |
| JIANG Zezhong,ZHANG Hua,XIE Tao,QIU Yanjun.Research on Meso-damage Evolution of Asphalt Mixtures Based on Image Technology[J].Journal of Highway and Transportation Research and Development,2009,26(2). |
| |
| Authors: | JIANG Zezhong ZHANG Hua XIE Tao QIU Yanjun |
| |
| Institution: | 1.School of Civil Engineering;Southwest Jiaotong University;Chengdu Sichuan 610031;China;2.School of Civil Engineering & Architecture;Guizhou University;Guiyang Guizhou 550022;China |
| |
| Abstract: | By means of CT image technology,meso-damage evolution rules of three types of asphalt mixture specimens(including AC20,SMA16 and ATB25) under uniaxial compression were investigated.the results show that(1) voids in such a sample play the control role of deformation in the process of damage evolution;(2) propagation rate and growth degree of internal cracks are seriously influenced by loading rates;(3) temperature has significant influence on the ultimate strength and crack propagation behavior of asphalt mi... |
| |
| Keywords: | CT |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
