Analysis of Bonding Properties of Corroded Reinforcement Concrete  

作　　者：Liang Fang Yingzhuo Liu 

机构地区：[1]College of Water Resources&Civil Engineering,Hunan Agricultural University,Changsha 410128,Hunan Province,China

出　　处：《Journal of Architectural Research and Development》2024年第3期80-92,共13页建筑发展研究

基　　金：Scientific Research Fund of Hunan Provincial Education Department(21A0123)。

摘　　要：In order to investigate the degradation of bonding properties between corroded steel bars and concrete,this study employs the half-beam method to conduct bond-slip tests between corroded steel bars and concrete after impressed-current accelerated corrosion of the steel bars in concrete.The effects of steel corrosion rate,steel bar diameter,steel bar strength grade,and concrete strength grade on the bonding properties between concrete and corroded steel bars were analyzed.The influence of different corrosion rates on specimens’bonding strength and bond-slip curves was determined,and a constitutive relationship for bond-slip between corroded steel bars and concrete was proposed.The results indicate that the ultimate bonding strength of corroded reinforced concrete specimens decreases with increasing corrosion rate.Additionally,an increase in corrosive crack width leads to a linear decrease in bonding strength.Evaluating the decline in adhesive properties through rust expansion crack width in engineering applications is feasible.Furthermore,a bond-slip constitutive relationship between corroded steel bars and concrete was established using relative bond stress and relative slip values,which aligned well with the experimental findings.

关 键 词：CORROSION Reinforced concrete Bonding property Constitutive relation 

分 类 号：TG1[金属学及工艺—金属学]