硅酸盐通报2025，Vol.44Issue(12)：4346-4358,13.DOI:10.16552/j.cnki.issn1001-1625.2025.0623
正混凝土劈裂拉伸损伤过程的细观模拟研究
Mesoscopic Simulation Study on Splitting Tensile Damage Process of Orthoconcrete
摘要
Abstract
In order to investigate the damage characteristics of the splitting and tensile process of orthoconcrete,a three-dimensional five-phase mesoscopic model was established,which included mortar,aggregates,the interfacial transition zone of the outer surface of reference aggregates,the interfacial transition zone of the outer surface of post-filling aggregate and pores.The effect of mesh size on the final failure mode and stress-strain relationship of concrete were studied,and the effects of coarse aggregate filling rate and aggregate particle size on the splitting tensile properties of concrete were analyzed.The results show that when the mesh size is 1.0 mm,the model can effectively simulate the crack morphology and stress-strain relationship of splitting tensile damage of orthoconcrete.The splitting tensile strength of orthoconcrete increases first and then decreases with the increase of filling rate,and reaches the maximum when the post-filling rate is 20％(volume fraction).When the filling rate is constant,the splitting tensile strength of orthoconcrete with 16～31.5 mm filling aggregate is higher.The comparison between simulation and experimental results reveal low the error value,which indicates that the proposed mesoscopic model can successfully simulate the damage behavior of orthoconcrete under splitting tensile stress.关键词
正混凝土/劈裂拉伸/细观模型/抛填率/裂纹扩展Key words
orthoconcrete/splitting tensile/mesoscopic model/post-filling rate/crack propagation分类
建筑与水利引用本文复制引用
HAN Jin,SUN Jiangtao,LI Zhitang,HUANG Sheng,SHEN Weiguo,ZHAO Qinglin..正混凝土劈裂拉伸损伤过程的细观模拟研究[J].硅酸盐通报,2025,44(12):4346-4358,13.基金项目
保利长大工程有限公司科研项目(RD22-04-015) （RD22-04-015）
"十三五"国家重点研发计划课题(2016YFB0303603) （2016YFB0303603）
国家自然科学基金项目(51972247) （51972247）
