NUMERICAL ANALYSIS OF BOND-SLIP BEHAVIOR IN RC BEAMS BASED ON OPENSEES

Many scholars have done a lot of research on bond-slip behavior in reinforced concrete structures. Besides experiments, numerical analysis is also important. In this paper, on the basis of summarizing bond-slip models nowadays, a refined model in OpenSees according to the method of discrete model is built and then the bond-slip behavior between rebar and concrete is studied through analyzing a pull-out specimen and RC beam component. The influence of stirrup on bond stress and slip distribution is considered. From the analytical results, it is found that the numerical model is reasonable to reflect the bond stress and its change law. At the same time the phenomena of beam simulation show that many factors have effects on its whole performance such as the bond stress, slip of rebar and ratio of stirrups which can affect the bond-slip distribution. The stirrups affect the slip in part of the beam but in general it has little effect.