纤维沥青混凝土低温开裂的分形研究  

Fractal Features of Cracking at Low-Temperature of Fiber Asphalt Concrete

作　　者：吴国雄[1] 李亮[1] 胡敢峰[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2009年第3期537-542,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50778186)

摘　　要：纤维对沥青混凝土裂缝具有抑制作用,同时,纤维沥青混凝土开裂具有分形特征,为此,通过观察在温度、荷载作用下不同纤维含量的沥青混凝土的开裂情况并提取相应的裂缝分布,应用分形维数来研究纤维沥青混凝土在低温时裂缝的生长情况,建立温度、荷载与分形维数之间的关系,从而通过分形维数的变化规律,描述纤维沥青混凝土裂缝生成及扩展过程,为纤维沥青混凝土的开裂研究提供了一种新的思路。It is researched that the fiber can inhibit asphalt concrete cracking and the fiber asphalt concrete cracks possess fractal characteristics. Therefore, through the observation of asphalt concrete cracking of different fiber content under the effect of temperature and load and the extraction of comes-ponding crack distribation, the fractal dimension is adopted to study the growth of the fiber asphalt concrete at low temperature and establish the relationships among temperature, load and fractal dimension. The process of generating and expanding of fiber asphalt concrete cracking can be verified by the change law of fraetal dimension, which provides a new thought to research the cracking of fiber asphalt concrete.

关 键 词：纤维沥青混凝土 低温开裂 裂缝提取 分形特征 分形维数 

分 类 号：U414.75[交通运输工程—道路与铁道工程]