Abstract: As the most primary composite material in the field of modern civil engineering, reinforced concrete (RC) has been widely adopted in practical engineering. A favorable bond behavior between concrete and reinforcement plays a pivotal role in service performance of RC structure, which affects the mechanical properties in different stages of a structure's life circle. However, since the interfacial bond-slip relationship of RC related to diverse variants is extremely complex, the impact of bond-slip behavior is gene-rally neglected in the actual structural analysis, hence leading to a large deviation between the analysis result and the actual one. Up to date, domestic and foreign scholars have established a corresponding bond-slip constitutive relationship and model through numerous experimental investigations and comprehensively analyzing various factors affecting the bond-slip behavior. Based on the previous studies, some scholars have developed theoretical models and numerical modeling methods for bond-slip behavior of RC. It is demonstrated that the simulation accuracy of the structural response can be enhanced through utilizing the bond-slip models in structural analysis. Therefore, in order to improve the accuracy of analysis results and ameliorate the overall structural mechanical performance, it is necessary to reveal the bond failure mechanism and pertinent influencing factors of RC, obtain the influencing regular pattern of diverse factors on the bond-slip behavior, and develop corresponding bond-slip constitutive relations and numerical mode-ling methods and apply them into the structural analysis. In this paper, the research findings with regard to the bond-slip relationship of RC are detailedly reviewed from the aspects of bond mechanisms, experimental study, and theoretical and numerical models. Firstly, the calculation methods of bond stress, the establishment of bond-slip constitutive relationship and the bond failure modes are briefly expounded. Furthermore, in the aspect of experimental research, a series of correlative bond tests at home and abroad and the corresponding bond-slip constitutive relationships are elaborated, and various factors affecting the bonding performance are summarized. In the aspect of model analysis, the theoretical models and numerical models of bond-slip are expatiated, wherein the numerical modeling methods are classified into direct modeling methods and indirect modeling methods. Then the merits and demerits and applicability of the two methods are briefly introduced. Finally, the writer analyzes the deficiencies in the bond-slip research as well as future research directions and trends, and points out that the bond-slip relation considering the coupled effect of environmental factors such as reinforcement corrosion, freeze-thaw cycles action, etc. is the crux of future research on bond-slip of RC. Thus, extensive experimental research and theoretical analysis should be devoted to enrich the research in this field for further perfecting the basic theoretical system of RC, which can provide a reference for the durability of the practical engineering structure.
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2018, Vol. 32 
