考虑纤维分布的钢纤维自密实混凝土抗折模拟  

Flexural Simulation of Steel Fiber Reinforced Self-compacting Concrete Considering Fiber Distribution

作　　者：赵云 毕继红[2] 刘晓敏 周俊龙 王伟 ZHAO Yun;BI Jihong;LIU Xiaomin;ZHOU Junlong;WANG Wei(China Construction Sixth Engineering Bureau Co.,Ltd.,Tianjin 300171,China;Key Laboratory of Coast Civil Structure Safety of Ministry of Education,Tianjin University,Tianjin 300072,China;CSCEC City Construction Development Co.,Ltd.,Beijing 100037,China)

机构地区：[1]中国建筑第六工程局有限公司,天津300171 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072 [3]中建城市建设发展有限公司,北京100037

出　　处：《建筑材料学报》2023年第5期475-482,共8页Journal of Building Materials

基　　金：中建股份科技研发课题(CSCEC-2021-Z-10);特种混凝土性能与施工技术研究项目(CSCEC6B-2022-Z-3)。

摘　　要：考虑纤维在自密实混凝土中的分布,提出一种用于模拟钢纤维自密实混凝土(SFRSCC)抗折性能的数值方法 .首先,采用基于流体动力学的方法模拟新拌SFRSCC的浇筑过程,以确定钢纤维的分布;然后,基于钢纤维在SFRSCC试件中的分布,考虑钢纤维取向角度对钢纤维拔出响应的影响,建立由混凝土基体和钢纤维组成的SFRSCC细观有限元模型;最后采用提出的数值方法对SFRSCC梁试件的浇筑过程和抗折试验进行细观模拟.模拟结果与试验结果吻合良好,说明提出的数值方法能够模拟SFRSCC的抗折性能.Considering the fiber distribution in self‑compacting concrete(SCC),a numerical method was proposed to simulate the flexural properties of steel fiber reinforced self‑compacting concrete(SFRSCC).The computational fluid dynamics(CFD)based method was used to simulate the casting process of fresh SFRSCC to determine the distribution of the steel fibers.Based on the fiber distribution in SFRSCC specimens,a meso‑scale finite element model of SFRSCC composed of the concrete matrix and steel fibers was established,in which the influence of fiber orientation angle on fiber pull‑out response was considered.The casting process and flexural tests of SFRSCC beams were simulated by the proposed numerical method.The simulation results are in good agreement with the experimental results,which proves that the proposed numerical method can be used to simulate the flexural properties of SFRSCC.

关 键 词：钢纤维自密实混凝土 细观数值模型 纤维分布 纤维取向 流体动力学 

分 类 号：TU528.01[建筑科学—建筑技术科学]