硅酸盐通报2023，Vol.42Issue(12)：4242-4253,12.
BFRP筋碱激发海砂混凝土梁抗弯性能研究
Bending Performance of BFRP Bars Alkali-Activated Sea Sand Concrete Beams
摘要
Abstract
In this paper,a new type of material structural member of basalt bar alkali-activated sea sand concrete(BASC)beam was proposed.In order to study the bending performance of BASC beams,five concrete beams were fabricated.The effects of basalt fiber reinforced polymer(BFRP)reinforcement ratio and different reinforcement types on the bending performance and failure modes of alkali-activated sea sand concrete(ASC)beams were studied.The test results show that the increase of the reinforcement ratio of BASC beams has little effect on the cracking load,but it can effectively improve its ultimate load.Taking the reinforcement ratio of 0.27% as the reference group,when the reinforcement ratio increases to 0.48% ,0.75% and 1.08% ,the ultimate bearing capacity of BASC beams increases by 109.46% ,119.60% and 189.66% ,respectively.Compared with ordinary steel bars,the elastic modulus of BFRP bars is smaller.With the same reinforcement ratio,the cracking load of ordinary steel bar ASC beams is 50% ,larger than that of BASC beams.The theoretical calculation models of bending capacity,maximum crack width and deflection of normal section are proposed.Due to the influence of chloride ion diffusion in ASC,the calculation model needs to be modified.The calculated values of BASC beams after fitting are in good agreement with the experimental values,which can provide reference for the application of BASC beams in ocean engineering.关键词
BFRP筋/碱激发海砂混凝土/抗弯性能/正截面承载力计算/破坏形态/海洋工程Key words
BFRP bar/alkali-activated sea sand concrete/bending performance/calculation of normal section bearing capacity/broken form/ocean engineering分类
建筑与水利引用本文复制引用
范小春,崔祺,张澳,王文琦..BFRP筋碱激发海砂混凝土梁抗弯性能研究[J].硅酸盐通报,2023,42(12):4242-4253,12.基金项目
国家自然科学基金(41972271) （41972271）
武汉理工大学三亚科教园开放基金(2021KF0001) （2021KF0001）
海洋建筑智能建造技术研发(ZDKJ2021024) （ZDKJ2021024）
