Behavior of reinforced concrete members prone to shear deformations: Part II Effect of interfacial bond stress-slip
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Interfacial bond stress-slip between the concrete and longitudinal reinforcement always occurs in reinforced concrete (RC) members. For strength design purposes, the effect of interfacial bond stress-slip does not have a significant effect on the overall strength of the RC members with adequate reinforcement development length. The results in a companion paper, however, showed that the direct application of the Modified Compression Field Theory (MCFT) led to an overestimation of the post-cracking stiffness of the RC bent cap members. This may be attributed to the inadequate representation of bond-slip using tension-stiffening in MCFT. Constitutive models for bond-slip between the concrete and reinforcement available in the literature are normally applied to RC members where flexural deformations are dominant, but these may not be applicable to shear-dominated RC members. A parametric study on the effect of interfacial bond-slip modeling in shear-dominated RC members is presented. Results from the analytical investigation are compared with experimental results on RC bent caps. Based on this parametric study, a new bond-slip model is proposed for RC members prone to shear deformations with lumped longitudinal reinforcement. Copyright 2006, American Concrete Institute. All rights reserved.
author list (cited authors)
Powanusorn, S., & Bracci, J. M.
complete list of authors
Powanusorn, Suraphong||Bracci, Joseph M