Title:
Behavior of Reinforced Concrete Members Prone to Shear Deformations: Part II—Effect of Interfacial Bond Stress-Slip
Author(s):
Suraphong Powanusorn and Joseph M. Bracci
Publication:
Structural Journal
Volume:
103
Issue:
5
Appears on pages(s):
747-753
Keywords:
concrete; longitudinal reinforcement; shear
DOI:
10.14359/16927
Date:
9/1/2006
Abstract:
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.