Application of Bond-Slip in the Finite Element Analyses of Reinforced Concrete Shear Walls

Transfer of tensile forces from reinforcing steel into the surrounding concrete affects the behavior of reinforced concrete members. this transfer relies on the bond action between the steel and the concrete. under monotonic loading the part of bond strength due to chemical adhesion is easily exhausted and bearing against the lugs is the primary load-transfer mechanism at loads near the ultimate. these stresses cause internal cracking of concrete at the steel-concrete interface. this paper deals with the finite element modeling of the bond-slip and its application due to internal cracking of the first layer of concrete surrounding the bar and the bending and/ or cracking of the small concrete teeth near the bar lugs. a previously proposed constitutive steel stress-bond slip relation by mirza and houde (1979) was used in finite element analysis of reinforced concrete shear wall specimens and the results were presented.