Interfacial strain energy release rate of fiber reinforced concrete based on bond stress-slip relationship

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Title: Interfacial strain energy release rate of fiber reinforced concrete based on bond stress-slip relationship

Author(s): Sameer A. Hamoush and M. Reza Salami

Publication: Structural Journal

Volume: 87

Issue: 6

Appears on pages(s): 678-686

Keywords: bond (concrete to reinforcement); bond stress; deformation; cracking (fracturing); fiber reinforced concretes; finite element method; mathematical models; slippage; stiffness; strain energy methods; structural analysis; Structural Research

Date: 11/1/1990

Abstract:
An analytical model is developed to predict the ultimate tensile strength of fiber reinforced concrete when the failure is governed by fiber debonding, and to account for the interfacial slip between the concrete and the fiber. The analytical analysis is based on the principle of the compliance method in fracture mechanics with the presence of a traction-free interfacial crack between the fiber and the concrete. The model is developed based on the assumption that both the concrete and the fiber behave elastically. Also, it is assumed that the relationship is known for the bond shear stress and the slip for the given concrete and reinforcement. It is shown that the pullout strain energy release rate for fiber reinforced concrete can be obtained for cases with and without the existence of an interfacial crack. Numerical examples are presented and compared to results obtained in the literature by using finite element analyses and experimental tests. The comparison demonstrates the accuracy and the convergence of the model.