水利学报2015，Vol.46Issue(12)：1423-1433,11.DOI:10.13243/j.cnki.slxb.20150188
基于数值方法的混凝土细观结构变化规律与力学性能研究
Research on concrete mesoscopic structure changing law and mechanical property based on numerical methods
李强 1任青文 2殷亚娟1
作者信息
- 1. 河海大学 力学与材料学院,江苏 南京 210098
- 2. 中国电建集团中南勘测设计研究院有限公司 工程设计一院,湖南 长沙 410014
- 折叠
摘要
Abstract
Taking specimen aggregate area and interface perimeter relation as the index for representing con?crete mesostructure, specimen mesostructure changing law is studied with numerical method by quantifying the index with fractal methods. Then the effect of mesostructure changing on specimen mechanical property and the mechanism are also further studied. Through the research, following results are obtained:(1) the change of aggregate volume fraction affects the mesostructure little, while the change of specimen size has a lot of influence on the mesostructure;(2) the change of specimen size affects its mechanical property a lot,while the change of aggregate volume fraction barely affects it:that is the contribution of aggregate vol?ume fraction increase on specimen bearing capacity increase and global stress level decrease would be more obviously with larger size;(3) the increase of aggregate volume fraction would not only increase local cracking stress, but also decrease the cracking strain, resulting in larger cracking brittleness, thus the cracking localization feature would be more obviously in larger aggregate volume fraction situation.关键词
分形维理论/面积周长法/细观结构/骨料面积/界面周长/骨料投放率/试件尺寸/力学特性Key words
fractal theory/area-perimeter method/mesoscopic structure/aggregate area/interface perime?ter/aggregate volume fraction/specimen size/mechanical property分类
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李强,任青文,殷亚娟..基于数值方法的混凝土细观结构变化规律与力学性能研究[J].水利学报,2015,46(12):1423-1433,11.
