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

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.

Deteriorated seismic capacity assessment of reinforced concrete bridge piers in corrosive environment

“…Several works from literature are focused on the experimental study of deteriorated RC columns under earthquake loading and their strengthening adopting different techniques. 4,5 The basic idea is to repair and use again deteriorated RC elements due to aging and Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.…”

“…Several works from literature are focused on the experimental study of deteriorated RC columns under earthquake loading and their strengthening adopting different techniques 4,5 . The basic idea is to repair and use again deteriorated RC elements due to aging and earthquake actions, as an important way to achieve a sustainable use of resources.…”

Strengthening and Repair of a Precast Reinforced Concrete Residential Building

“…Raza, et al, [14] provided state of the art review of several strengthening and repair techniques for RC columns, suggested by many researchers in the last two decades. The most commonly used repair techniques presented included: Reinforced concrete/mortar jacketing, steel jacketing, externally bonded fiber-reinforced polymer of carbon and glass types (CFRP/GFRP) jacketing, basalt fiber-reinforced polymer (BFRP), near-surface mounted (NSM), FRP sheets with steel jacketing, and high-performance materials with steel/FRP rebars or FRP wrapping.…”

Shear Strength of Reinforced Concrete Columns Retrofitted by Glass Fiber Reinforced Polyurea

“…Lee et al [3] reported a method to enhance the shear strength of RC columns through strengthening by a sprayed FRP system such as chopped glass and carbon fibers with epoxy or vinyl ester resin. Wang et al [4] found that the ductility and energy-dissipation capacities of non-ductile RC columns could be improved by retrofitting with CFRP wraps at the ends of the columns. Zoppo et al [5] observed increases in the capacity and ductility of columns reinforced with externally bonded FRP and an increase in the shear capacity with the application of discontinuous CFRP strips.…”