The mechanism of bond transfer between steel and concrete in a reinforced concrete member is studied in the present work. It is seen that the behavior of the interface zone can be represented by a simple generalized Mohr–Coulomb model. It is also seen that the complex relationships between the local bond stress and local slip suggested by other researchers (cubic or higher order polynomials) may be due to the geometry of the specimen and nature of stress distribution along the bar rather than intrinsic interface behavior. Behavior predicted by a generalized Mohr–Coulomb model is compared to predictions and observed behavior previously reported.
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Mital, S.K., Mullen, R.L. & Huckelbridge, A.A. Interface Behavior in Reinforced Concrete. MRS Online Proceedings Library 114, 239 (1987). https://doi.org/10.1557/PROC-114-239