南京工业大学学报（自然科学版）2025，Vol.47Issue(3)：260-270,11.DOI:10.3969/j.issn.1671-7627.2025.03.005
混杂非结构型和结构型玄武岩纤维增强混凝土板抗弯试验
Flexural performance of hybrid non-structural and structural basalt fiber-reinforced concrete slabs
摘要
Abstract
Four-point bending tests were conducted on hybrid non-structural and structural concrete one-way slabs with basalt fiber-reinforced polymer.The failure modes,crack distribution,and load curves were compared,and a theoretical analysis of the ultimate load calculation method for hybrid fiber-reinforced concrete slabs was conducted.The results showed that the addition of hybrid fibers altered the failure mode of concrete slabs with BFRP bars,transitioning from brittle diagonal tension failure to ductile flexural failure.Non-structural fibers effectively suppressed the propagation of micro-cracks,maintaining the concrete's integrity during the early loading stage.Upon concrete cracking,the structural fibers carried part of the tensile stress on the crack surfaces,significantly limiting the propagation of macro-cracks.Prior to crack propagation reaching the level of longitudinal reinforcement,the position of the neutral axis at the mid-span section of hybrid fiber-reinforced concrete slab remained essentially unchanged,and the strain distribution conformed to the plane section assumption.Compared with specimen C-5S8,the specimen HFRC-5S8 increased cracking load,yield load,and failure load by 35.6％,51.1％,and 34.8％,respectively.Compared with specimen C-5B8,the specimen HFRC-5B8 increased cracking load and failure load by 50.7％and 30.2％,respectively.For steel-concrete specimens,the theoretical calculated values closely matched the experimental values.However,the calculated values for hybrid fiber-reinforced steel-concrete specimens were 22％lower than the experimental values.It was demonstrated that the theoretical calculation method could provide conservative estimations of the ultimate bearing capacity for hybrid fiber-reinforced concrete specimens.关键词
混杂纤维/破坏模式/裂缝发展机制/玄武岩纤维增强混凝土/极限承载力/混凝土开裂Key words
hybrid fiber/failure mode/crack propagation mechanism/basalt fiber-reinforced concrete/ultimate bearing capacity/concrete cracking分类
土木建筑引用本文复制引用
赖富才,刘霞,汪昕,李伟涛,吴智深..混杂非结构型和结构型玄武岩纤维增强混凝土板抗弯试验[J].南京工业大学学报（自然科学版）,2025,47(3):260-270,11.基金项目
中央高校基本科研业务费专项资金(2242024k30039,2242024k30050) （2242024k30039,2242024k30050）
