中南大学学报（自然科学版）2024，Vol.55Issue(9)：3384-3399,16.DOI:10.11817/j.issn.1672-7207.2024.09.014
基于纤维-骨料细观分布的自密实钢纤维混凝土单调和循环压缩性能研究
Cyclic compression performance of SFRSCC based on meso-distribution of fiber-aggregate
摘要
Abstract
The compressive performance,component content,and dispersion state of self-compacting steel fiber reinforced concrete(SFRSCC)are significantly correlated.To investigate these correlations,SFRSCC prism specimens were prepared using mixtures with different component proportions.Monotonic and cyclic compression tests were conducted to explore the compressive performance characteristics.The coarse aggregate content was described using the percentage of coarse aggregate area,and the steel fiber content and dispersion were quantified as VORONOI toughening area statistics.The correlations between the compressive mechanical properties and the internal component content and distribution characteristics were established.Based on the aforementioned correlations,constitutive equations for the monotonic and cyclic compression elastoplastic damage behavior of SFRSCC structures were established.The results show that increasing the coarse aggregate content can improve the elastic modulus and peak strength of the matrix.Increasing the fiber dosage reduces the toughening area required by the steel fibers and delays the accumulation of post-peak plastic deformation.During the self-compacting process,increasing steel fiber dosage can suppress the increase of the coarse aggregate content,which requires a balance between the Voronoi area and the percentage of coarse aggregate area to meet the requirements of toughening and strengthening.The constitutive equations for the monotonic and cyclic compression elastoplastic damage behavior of SFRSCC structures can realize analysis of the local compressive performance of SFRSCC structures.关键词
钢纤维自密实混凝土/钢纤维分布/粗骨料分布/Voronoi面积/循环受压/弹塑性损伤Key words
steel fiber self-compacting concrete/steel fiber distribution/coarse aggregate distribution/Voronoi area/cyclic compression/elastic-plastic damage分类
土木建筑引用本文复制引用
雷明锋,胡子威,刘凌晖,扎西草,李水生,杨子汉..基于纤维-骨料细观分布的自密实钢纤维混凝土单调和循环压缩性能研究[J].中南大学学报（自然科学版）,2024,55(9):3384-3399,16.基金项目
国家自然科学基金资助项目(51978669) （51978669）
湖南省自然科学基金资助项目(21JJ30825) （21JJ30825）
中央高校基本科研业务费专项资金资助项目(502802002) （502802002）
中国建筑第五工程局科技研发项目(cscec5b-2022-26)(Project(51978669)supported by the National Natural Science Foundation of China （cscec5b-2022-26）
Project(21JJ30825)supported by the Natural Science Foundation of Hunan Province （21JJ30825）
Project(502802002)supported by the Fundamental Research Funds for the Central Universities （502802002）
Project(cscec5b-2022-26)supported by the Science and Technology Research and Development Program of China Construction Fifth Engineering Bureau) （cscec5b-2022-26）
