Reinforcement Anchorage Slip under Monotonic Loading

Abstract

An analytical procedure is proposed for the force‐deformation relationship of a reinforcing bar anchored in concrete. The procedure leads to computation of deformations in two parts, as extension and slippage. The extension of reinforcement is determined by establishing inelastic strain distribution along the embedment length of the bar. Constant average bond along the elastic length and frictional bond over the plastic length are assumed. The rigid body slippage of the bar is computed when the bar is stressed to the far end. An increase in the elastic bond stress is considered to develop the bar force with the available anchorage length. The elastic bond at the far end of the bar is used with a previously derived local bond‐slip model to obtain the rigid body slippage of the bar. The procedure is applied to straight as well as hooked bars, subjected to pull, and simultaneous push and pull, simulating exterior and interior joints. The results are verified against a large volume of experimental data reported in the literature.