Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review

TLDR

Sustainability demands protecting reinforced concrete infrastructure from deterioration caused by extreme events and corrosion, necessitating timely strengthening to preserve service life. This review surveys strengthening and repair methods for RC columns developed over the past two decades. It focuses specifically on jacketing techniques applied to both normal‑ and high‑strength RC columns. The paper highlights research gaps and proposes future research directions for RC column strengthening and repair.

Abstract

Sustainability necessitates the protection of infrastructure from any kind of deterioration over the life cycle of the asset. Deterioration in the capacity of reinforced concrete (RC) infrastructure (e.g., bridges, buildings, etc.) may result from localised damage sustained during extreme loading scenarios, such as earthquakes, hurricanes or tsunamis. In addition, factors such as the corrosion of rebars or ageing may also deteriorate or degrade the capacity of an RC column, thereby necessitating immediate strengthening to either extend or ensure its design life is not limited. The aim of this paper is to provide a state-of-the-art review of various strengthening and repair methods for RC columns proposed by different researchers in the last two decades. The scope of this review paper is limited to jacketing techniques for strengthening and/or repairing both normal- and high-strength RC columns. The paper also identifies potential research gaps and outlines the future direction of research into the strengthening and repair of RC columns.