Seismic retrofitting of corroded RC columns using advanced composite materials

Rajput, Aditya Singh; Sharma, Umesh Kumar

doi:10.1016/j.engstruct.2018.12.009

Cited by 34 publications

(10 citation statements)

References 18 publications

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“…Francisco J. Rescalvo et al [20] in 2018 had exhibited a philosophy for the checking of timber bars for retrofitting with Carbon Fiber Reinforced Polymer by using Acoustic Emission system (AE). This outcome was exceptionally encouraging for safety observing of retrofitted timber components in genuine situations.Aditya Singh Rajput et al [21] had inspected to reestablish the seismic execution of corroded Reinforced Concrete (RC) sections. Retrofitting materials involved High-Performance Fiber Reinforced Concrete and Glass Fiber Reinforced Polymer wraps.…”

Section: Survey On Frp Concrete Structures Related To Recent Literaturementioning

confidence: 99%

An Experimental Interpretation of High-Performance Fiber-Reinforced Polymer Concrete with FNN Paradigms

Thomas*,

Jose

2020

IJRTE

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Strengthening and enhancing of Reinforced Concrete (RC) structural components are important to broaden its administration period, overcoming the first structure limits and to limit the impact of construction defects as well as the design defects. In this work, Fiber Reinforced Polymers (FRPs) is utilized as to strengthen RC structures. In this paper, the utilization of FRP such as Sisal, Jute, and Coir in concrete structures is being examined for its viability in upgrading structural execution both regarding strength and ductility. The structural behavior of FRP specimen is examined by experimental and numerical examination by estimating the parameters, for example, compressive strength, tensile strength, ductility, and deflection. Here, we utilized the Fuzzy Neural Network (FNN) procedure to test the strength of specimen. At the point, when compared with existing work, the proposed FNN model achieves the greatest performance in terms of all parameters for the fiber reinforced specimen under various loaded condition.

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Section: Survey On Frp Concrete Structures Related To Recent Literaturementioning

confidence: 99%

An Experimental Interpretation of High-Performance Fiber-Reinforced Polymer Concrete with FNN Paradigms

Thomas*,

Jose

2020

IJRTE

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“…A significant improvement in the hysteretic damping energy of the strengthened column was also observed. More recently, high performance fiber-reinforced concrete (HPFRC) was used in conjunction with FRP wrapping by Rajput et al [100] to repair corrosion-damaged RC columns. The columns were strengthened with HPFRC and one or two layers of glass fiber-reinforced polymers (GFRP).…”

Section: High-performance Materials With Steel/frp Rebars or Frp Wrapmentioning

confidence: 99%

“…The original column was first damaged until 25% strength degradation under constant axial load and cyclic lateral actions and was then repaired using the proposed retrofitting technique. The results of the experimental study More recently, high performance fiber-reinforced concrete (HPFRC) was used in conjunction with FRP wrapping by Rajput et al [100] to repair corrosion-damaged RC columns. The columns were strengthened with HPFRC and one or two layers of glass fiber-reinforced polymers (GFRP).…”

Section: Thin Cold-formed Steel Sheet With Prestressing Strandsmentioning

confidence: 99%

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

et al. 2019

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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.

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“…Very few studies in the past have also examined the seismic behavior of corroded RC columns with different cross‐sectional shapes for a range of corrosion degrees varying from 4 to 22.75%. These limited studies have considered corrosion of either only confining reinforcement or of only main longitudinal reinforcement, and there is hardly any study where corrosion of the entire steel cage was considered . In all these studies, it has generally been agreed that increasing level of corrosion affects the structural performance of columns adversely .…”

Section: Introductionmentioning

confidence: 99%

“…These limited studies have considered corrosion of either only confining reinforcement 9 or of only main longitudinal reinforcement, 10 and there is hardly any study where corrosion of the entire steel cage was considered. 11,12 In all these studies, it has generally been agreed that increasing level of corrosion affects the structural performance of columns adversely. 13 Aquino et al 14 16 reported flexural strength reduction in under-confined corroded RC circular columns of 18.16 and 10.82% at 9.3 and 14.7% corrosion degrees, respectively, while a reduction in stiffness and displacement ductility factor was also noticed.…”

Section: Introductionmentioning

confidence: 99%

Performance of aged reinforced concrete columns under simulated seismic loading

Rajput

Sharma

2019

Structural Concrete

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Experimental investigations were carried out to examine the seismic performance of corroded reinforced concrete (RC) columns with sparsely distributed ties (under‐confined columns). Four full‐scale specimens were cast, corroded, and tested in this study. One specimen followed current seismic guidelines and acted as control column, while other three columns with larger tie spacing represented precode era under‐confined columns. Two of the three under‐confined columns were corroded to 15 and 30% corrosion degrees using a precalibrated accelerated corrosion regime. The entire study was intended to quantify the effect of inadequate confinement and corrosion on seismic response of RC columns. The results showed that the sparsely distributed transverse reinforcement resulted in lowering lateral strength and deformability of RC Columns. When these under‐confined columns were deteriorated by corrosion, their structural performance was found to have degraded significantly. It was observed that the specimens with 15 and 30% corrosion had 23 and 37.1% lower lateral load capacity respectively with respect to their un‐corroded counterpart. Furthermore, the observed lower values of ductility factors and other essential performance indicators manifested the adverse effects of inadequate confining reinforcement and aging‐related corrosion.

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Seismic retrofitting of corroded RC columns using advanced composite materials

Cited by 34 publications

References 18 publications

An Experimental Interpretation of High-Performance Fiber-Reinforced Polymer Concrete with FNN Paradigms

An Experimental Interpretation of High-Performance Fiber-Reinforced Polymer Concrete with FNN Paradigms

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

Performance of aged reinforced concrete columns under simulated seismic loading

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