Investigating the effect of bond slip on the seismic response of RC structures

Abstract

It is reasonable to assume that reinforced concrete (RC) structures enter the nonlinear range of response during a severe ground motion. Numerical analysis to predict the behaviour therefore must allow for the presence of nonlinear deformations if an accurate estimate of seismic response is aimed. Among the factors contributing to inelastic deformations, the influence of the degradation of the bond slip phenomenon is important. Any rebar slip generates an additional rotation at the end regions of structural members which are not accounted for in a conventional analysis. Although these deformations could affect the seismic response of RC structures considerably, they are often neglected due to the unavailability of suitable models. In this paper, the seismic response of two types of RC structures, designed according to the Iranian concrete code (ABA) and the Iranian seismic code (2800), are evaluated using nonlinear dynamic and static analyses. The investigation is performed using nonlinear dynamic and static pushover analysis considering the deformations due to anchorage slip. The nonlinear analysis results confirm that bond slip significantly influences the seismic behavior of RC structure leading to an increase of lateral deformations by up to 30% depending on the height of building. The outcomes also identify important parameters affecting the extent of this influence.

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

“…By ignoring this additive rotation, the predicted lateral deformations may be significantly underestimated [9]. Energy dissipation capacity of joint [10], lateral deformation of RC frame [11][12][13], stiffness of RC frame [12], beam-end rotation [14][15][16][17], and natural frequency of RC frame [12] are the main effects of the bond-slip phenomenon on the structural behavior of interior and exterior beam-column joints. Due to the high slippage of reinforcing bar (rebar), columns in the interior joints can generally tolerate lower flexural moments, as compared to those obtained for the conditions without slippage (perfect bond).…”

Local Stress Behavior of Post-Tensioned Prestressed Anchorage Zones in Continuous Rigid Frame Arch Railway Bridge

“…Tensile tests for the new strands were carried out with seven different types of mono-strand anchorages by Kim et al [16] to investigate the tensile behavior of a newly developed uncoated strand according to various types of mono anchorages and appropriate anchorages for both strands were proposed. Considering the deformations due to anchorage slip, Fallah et al [17] studied the influence of bond slip on the seismic behavior of RC structure using nonlinear dynamic and static pushover analysis. Chen et al [18] studied the stress distribution and stress transfer mechanism of the cable-to-girder anchorage structure of tensile anchor plate type under the designed load.…”

Performance Evaluation of a Building Exposed to Corrosion from Ground Floor

“…Betonarme bir yapının istenen performansa sahip olması kritik kesitlerinin elastik-ötesi deformasyon yapabilmesine bağlıdır. Son yıllarda yapılan araştırmalarda kritik kesitlerin davranışını ifade eden ve eğilme davranışını esas alan farklı modeller bulunmasına karşın; kesme, aderans kaybı ve sıyrılmayı bir arada dikkate alan model bulunmamaktadır [5].…”