Damaged RC beams repaired by bonding of CFRP laminates

Benjeddou, Omrane; Ouezdou, Mongi Ben; Bedday, Aouicha

doi:10.1016/j.conbuildmat.2006.01.008

Cited by 103 publications

(53 citation statements)

References 12 publications

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“…are in line with several disadvantage such as difficult and time consuming application, and lack of durability [5]. To overcome these disadvantages, the application of EB-FRP sheets has emerged as an innovative rehabilitation technology in response to the increasing demand for retrofitting of existing structures [6]- [8]. The EB-FRP technology has several advantages over traditional rehabilitation techniques.…”

Section: Introductionmentioning

confidence: 99%

Repair of reinforced concrete beams using carbon fiber reinforced polymer

et al. 2017

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Abstract. This research paper is part of an ongoing research on the behaviour of Reinforced Concrete (RC) beams retrofitted with Externally Bonded Carbon Fiber Reinforced Polymer (EB-CFRP). A total of 5 largescale rectangular beams, previously damaged due to shear loading, were repaired and strengthened with EB-CFRP and tested in this study. The major cracks of the damaged beams were injected with epoxy and the beams were wrapped with 2 layers of EB-CFRP discrete strips with 100mm width and 150mm center to center spacing. The beams were instrumented and tested to failure under three points loading in simply supported configuration. The measured test parameters were the beams deflection, maximum load, and the strain in the FRP strips. The failure mode was also observed. The results showed that applying EB-FRP strips increased the shear strength significantly relative to the original shear capacity of the beam. The results demonstrate that the application of EB-FRP strips used in this study is an effective repair method that can be used to repair and strengthen damaged beams.

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Section: Introductionmentioning

confidence: 99%

Repair of reinforced concrete beams using carbon fiber reinforced polymer

et al. 2017

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“…Benjeddou et al . showed that the load capacity and the rigidity of FRP‐repaired beams are significantly higher than those of the control beam for all tested damage degrees. The externally bonded FRPs were able to help in taking more load.…”

Section: Introductionmentioning

confidence: 94%

Effect of glass fiber‐reinforced polymer and epoxy injection on compressive strength of elevated temperature damaged concrete

Demirboğa

Kaygusuz²,

Polat

2012

Fire and Materials

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SUMMARY Glass fiber‐reinforced polymer (GFRP) materials have received a great deal of interest among civil engineers during the past decade. This paper presents an overview of experimental studies carried out on GFRP‐wrapped and epoxy‐injected concrete samples exposed to elevated temperatures. For this purpose, 0.30, 0.35 and 0.40 water to binder (w/b) ratios were used. For each w/b ratio, normal aggregates were replaced by lightweight aggregates with a size fraction of 0–2 mm at three different volume fractions such as 10%, 20% and 30% of total aggregate volume. At the same time, a group of air‐entrained samples was also cast for each w/b ratios. Prepared samples were exposed to 600 °C for 3 h. The damaged samples were separately repaired by GFRP and epoxy injection. Before and after elevated temperature exposure, water absorption and compressive strength were tested. After repairing with GFRP and epoxy injection, only the compressive strength test was carried out. GFRP improved the compressive strength between 1–22% and 348–1403% for samples before and after being exposed to elevated temperatures, respectively. Epoxy injection increased the compressive strength of the samples, exposed to elevated temperature, between 1% and 123%. However, the epoxy injection process failed to recover the compressive strength of the samples before elevated temperature exposure. Copyright © 2012 John Wiley & Sons, Ltd.

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“…Arduni, Nanni (1997) used a similar procedure with a preloading of 30% of ultimate capacity. Benjeddou et al (2007) created various damaged beams with different preloading values and with different concrete strength class. They repaired them by varying the amount of carbon fiber reinforced (CFRP) laminates and the dimension of laminate widths.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Finite Element Analysis of Damaged and Strengthened Reinforced Concrete Beams

Aktaş

Sümer

2014

Journal of Civil Engineering and Management

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Bending test of seven reinforced concrete beams are modeled in finite element program to validate the modeling strategies by comparing the structural response of the beams. Three beams in the set are pre-damaged and strengthened with fiber reinforced composites before the bending tests. Cracks are implemented into the model by inserting geometrical discontinuities to represent the pre-damaged beams. Parametric variables such as crack width, length and interval are chosen to simulate different pre-damage levels. Once the proposed modeling strategies are validated by real experimental tests then 196 finite element models are created to study the effects of pre-damage levels on the moment capacity of reinforced concrete beams repaired with CFRP. Results indicate that inclusion of pre-damage levels by means of cracks into the cross sections have significant effect on beams moment capacity.Keywords: reinforced concrete beams, FRP, finite element, crack, nonlinear analysis, concrete damaged plasticity. Reference to this paper should be made as follows: Aktas, M.; Sumer, Y. 2014. Nonlinear finite element analysis of damaged and strengthened reinforced concrete beams, Journal of Civil Engineering and Management 20(2): 201-210. http://dx.

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Damaged RC beams repaired by bonding of CFRP laminates

Cited by 103 publications

References 12 publications

Repair of reinforced concrete beams using carbon fiber reinforced polymer

Repair of reinforced concrete beams using carbon fiber reinforced polymer

Effect of glass fiber‐reinforced polymer and epoxy injection on compressive strength of elevated temperature damaged concrete

Nonlinear Finite Element Analysis of Damaged and Strengthened Reinforced Concrete Beams

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