Investigation of reinforced concrete members with bond deterioration under tensile load

A.I. Quadri

doi:10.3989/mc.2023.297522

Authors

A.I. Quadri Civil Engineering Department, Yokohama National University https://orcid.org/0000-0001-5328-9379

DOI:

https://doi.org/10.3989/mc.2023.297522

Keywords:

Bond deterioration, Cracks, Dapped end beams, FEM analysis, Pull out

Abstract

Bond deterioration in reinforced concrete (RC) structures is frequently caused by aging, environmental factors, overloading, or poor design. This deterioration may cause the structure to lose its aesthetic, and eventually collapse. The behavior of structures that exhibit bond deterioration is poorly understood and inadequately maintained. The response of RC structures exhibiting bond loss under tension load is presented in this paper. In order to comprehend the impact of bond loss in RC composite, the RC system was first built for a pullout. It was then expanded to the nib corner of RC dapped end beams. Additionally, the system was analytically examined using 3-dimensional FEmodel. The bond loss created a weak zone with internal cracks parallel to the bar’s axis. The nib section separated from the full depth of the dapped end, while the hanger reinforcement resisted the diagonal tension cracks. The dapped section must therefore be given more consideration during monitoring and maintenance.

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