Review of Research on Bond-Slip of Corroded Reinforced Concrete
ZHENG Shansuo1,2, YANG Jianjun1,2, ZHENG Yue1,2, DONG Liguo1,2, WEN Guifeng1,2, JI Jinming1,2
1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 Key Laboratory of Structure Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi'an 710055, China
Abstract: Based on a large number of studies at home and abroad, this paper summarizes the bond performance between corroded steel bars and concrete from three aspects: the experimental method of steel corrosion, the bond strength of corroded steel bars and the bond stress slip constitutive relationship of corroded steel bars. First of all, the advantages and disadvantages of natural corrosion, artificial climate simulation and electrified accelerated corrosion test are analyzed. In the aspect of bond strength of corroded steel bars, the factors influencing bond strength of corroded steel bars are summarized, and the degradation models of bond strength at home and abroad are described in detail. In the aspect of bond stress-slip constitutive model of corroded steel bars, the bond slip constitutive model of corroded steel bars is elaborated from two aspects of monotonic and cyclic reverse load. It should be pointed out that there are a lot of researches on bond stress-slip constitutive model of corroded steel bars based on monotonic load at present, but there are relatively few researches under cyclic reverse load. At last, the shortcomings and research trends of this research direction are analyzed. It is pointed out that the prediction model of bond force based on the width of rust expansion crack is more practical, but the related model research is less. The existing research is mostly based on the pull-out specimen with strong external constraints, the failure mode is pull-out failure, and the research of bond performance under the split failure mode is less, but the actual situation is less Cleavage is the most common failure mode in engineering, so the bond performance under Cleavage mode should be the research focus.
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2020, Vol. 34 
