Title:
Reinforcement Slip in Reinforced Concrete Columns
Author(s):
Halil Sezen and Eric J. Setzler
Publication:
Structural Journal
Volume:
105
Issue:
3
Appears on pages(s):
280-289
Keywords:
bond-slip; bond stress; columns; lateral loads; reinforced concrete
DOI:
10.14359/19787
Date:
5/1/2008
Abstract:
Reinforcement slip in footings and beam-column joint regions can make a significant contribution to the total lateral displacement of a reinforced concrete structure. In this paper, a model for the prediction of lateral deformation of a column due to reinforcement slip in the anchorage zone is presented. The model employs a stepped bond stress along the embedded length of the reinforcing bar that allows for efficient computation of displacements due to slip. A method for computing slip when a reinforcing bar is stressed to its unloaded end and a corresponding failure criterion are presented. Procedures for calculating slip in hooked bars are also outlined. The proposed model is compared with five other commonly-used models found in the literature against three independent sets of test data. Considering its simplicity and computational efficiency, the proposed model predicts slip displacements reasonably well.