建筑结构学报2017，Vol.38Issue(7)：146-155,10.DOI:10.14006/j.jzjgxb.2017.07.018
锈蚀钢筋与钢纤维混凝土的黏结性能试验研究
Experimental study on bond behavior between corroded rebar and steel fiber reinforced concrete
摘要
Abstract
Steel fiber reinforced concrete (SFRC) has been used in retrofitting and strengthening of engineering structures extensively,depending on fine tension properties after cracking and toughness.In the case of corroded members repaired using SFRC,the bond behavior between corroded rebar and SFRC is a key factor for the mechanical properties of repaired members.In the present study,an electrolyte corrosion technique was firstly used to accelerate steel rebar corrosion,and then the corroded rebar was cleaned up and used for pullout specimens,and finally the bond behavior of corroded rebar and SFRC was studied through central pull-out test.The experimental results indicate that the addition of steel fiber can transform the splitting failure to pullout failure mode,and the bond strength ratio increases by 4.4％-7.5％.With the decrease in bond length,the relative slip between loading and free ends decreases whereas the average slip at the peak bond stress increases.The influence of corrosion ratio on the bond strength of reinforcement and SFRC is related to the bond length.When the corrosion ratio increases to about 15％,the bond strength decreases by 21％ for specimens with bond length 3d (d is diameter of reinforced rabar),while the bond strength almost remains a constant for specimens with bond length 7d.Based on the experimental results,an empirical equation,considering corrosion ratio and bond length,is proposed for predicting the bond strength,and the calculated result agrees well with the tested value.关键词
钢纤维混凝土/锈蚀钢筋/中心拉拔试验/黏结性能/滑移Key words
steel fiber reinforced concrete/corroded rebar/central pull-out test/bond behavior/slip分类
建筑与水利引用本文复制引用
侯利军,刘泓,徐世烺,陈达..锈蚀钢筋与钢纤维混凝土的黏结性能试验研究[J].建筑结构学报,2017,38(7):146-155,10.基金项目
国家自然科学基金项目(51408186),江苏省自然科学基金项目(BK20140853),水利部公益性行业科研专项(201501036). （51408186）
