摘要
为研究玄武岩纤维增强复合筋(BFRP筋)混凝土板梁的抗弯性能,论文设计并制作了1片普通钢筋混凝土(RC)板梁和4片分别采用不同直径BFRP筋配筋的混凝土板梁,开展集中力加载的抗弯试验。重点对比分析了各试件的承载性能、裂缝开展以及挠度变形等特性,试验结果表明,BFRP筋板梁的极限承载力随着BFRP筋直径的增大而显著提升,而在相同荷载下BFRP筋板梁比RC梁的裂缝宽度以及挠度均偏大,刚度裂缝控制相对较弱,且BFRP筋板梁的破坏形态主要以脆性破坏为主。因此,BFRP筋虽然可以有效提升混凝土板梁的极限承载能力,但仍需对裂缝控制以及延性方面进行进一步的优化。
To evaluate the flexural behavior of concrete slab beams reinforced with basalt fiber-reinforced polymer(BFRP)bars,this study fabricated one conventional reinforced concrete(RC)slab beam and four BFRP bars-reinforced slab beams with varying bar diameters.Flexural tests were conducted under concentrated loading,and a comprehensive comparative analysis was performed focusing on load-bearing capacity,crack development,and deflection responses.The results demonstrate that the ultimate load-bearing capacity of BFRP-reinforced slab beams increases markedly with the diameter of the BFRP bars.Under equivalent loading,BFRP-reinforced beams exhibited greater crack widths and deflections relative to the RC beam,indicating reduced crack control and stiffness.Furthermore,the failure mode of BFRP-reinforced slab beams was predominantly brittle.These findings suggest that while BFRP bars can significantly improve the ultimate strength of concrete slab beams,enhancements in crack control and ductility are necessary.
作者
周聪
张光明
李祥文
张毅
ZHOU Cong;ZHANG Guang-ming;LI Xiang-wen;ZHANG Yi(China Railway 11th Bureau Group Hanjiang Heavy Industry Co,Ltd,Xiangyang 441000,China)
出处
《建材世界》
2026年第1期48-50,55,共4页
The World of Building Materials
关键词
玄武岩复合纤维筋
混凝土板梁
抗弯性能
裂缝与变形
basalt fiber-reinforced polymer bars
concrete slab beams
flexural performance
cracks and deformation
