人民黄河2024，Vol.46Issue(7)：143-147,5.DOI:10.3969/j.issn.1000-1379.2024.07.024
不同粉煤灰掺量下SCC单轴压缩试验离散元数值分析
Numerical Simulation of SCC Uniaxial Compression Test with Different Fly Ash Content Based on Discrete Element Method
摘要
Abstract
In order to study the change of mechanical properties and failure behavior of self-compacting concrete with different fly ash con-tent,the FISH language in PFC2D and the linear bonding model built in the program were used to establish a single self-compacting concrete with different fly ash content.The discrete element model of the axial compression test was compared with the actual test results to analyze the internal failure form and force chain changes.The research shows that the ultimate strength of FA-SCC with different fly ash content increases first and then decreases,and the failure cracks are all diagonal cracks.The difference lies in the number of vertical cracks in the middle.The established two-dimensional discrete element numerical model type can well simulate the uniaxial compression test of fly ash self-compacting concrete structure,and can well observe the process of the generation of micro-cracks in the material,the expansion of cracks and the forma-tion of diagonal penetration cracks when the axial compression failure occurs,which makes up for the indoor test only relying on the naked eye.At the same time,the axial compressive strength and stress-strain curves of the self-compacting concrete output by the model under dif-ferent fly ash content are highly consistent with the laboratory test results,and the error of the maximum compressive strength measured does not exceed 7.1%,which is the result of fly ash.The discrete element simulation and mesostructure research of grey self-compacting concrete provide reference.关键词
自密实混凝土/粉煤灰/单轴压缩/离散元分析Key words
self-compacting concrete/fly ash/uniaxial compression/discrete element analysis分类
建筑与水利引用本文复制引用
程学磊,王亚佐,刘俊霞,郑锦辉,海然,何鲜峰..不同粉煤灰掺量下SCC单轴压缩试验离散元数值分析[J].人民黄河,2024,46(7):143-147,5.基金项目
国家自然科学基金资助项目(41877251) （41877251）
河南省高等学校重点科研项目(22A560021,23A560014) （22A560021,23A560014）
河南省自然科学基金面上项目(No.222300420596) （No.222300420596）
中原工学院青年骨干教师计划资助项目(2020XQG14) （2020XQG14）
中原工学院基本科研业务费专项资金项目(K2020QN015) （K2020QN015）
