Experimental study of RC jacketed and CFRP strengthened RC beams

Tahsiri, Hamidreza; Sedehi, Omid; Khaloo, Alireza; Raisi, Elias Molaei

doi:10.1016/j.conbuildmat.2015.07.161

Cited by 36 publications

(14 citation statements)

References 17 publications

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“…The energy dissipation capacity or fracture energy is obtained by the area under the load–displacement graph (Figure 7). The following integration (equation (2)) is used to find the area under the load–displacement curve, which is expressed here as energy dissipation index (EDI; Tashiri et al, 2015)…”

Section: Resultsmentioning

confidence: 99%

Behaviour of reinforced concrete beam strengthened in shear with geosynthetic

Majumder

Saha

2020

Advances in Structural Engineering

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The primary objective of this article is to focus on the experimental investigation of shear-deficient and geosynthetic-strengthened reinforced concrete beams. In this study, two varieties of geosynthetic, namely geogrid and geotextile, are used. The performances of shear-deficient reinforced concrete beams strengthened with geosynthetics under the single-point static monotonic loading are studied. It is observed that shear failure occurs in shear-deficient beam, but after strengthening the brittle shear failure changes to ductile flexure failure. A significant increment in flexural strength, ductility, energy absorption capacity and inelastic performance is observed in strengthened beams. The performance of geogrid is better in all respects when compared to the geotextile. The test results reveal that the use of geosynthetic not only increases the shear capacity but also remarkably improves the ductile behaviour of RC beams. In addition, conventional analytical methods are applied for the evaluation of the ultimate load, and the results are compared with the experimental findings, which show a good agreement between the analytical and experimental results.

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Section: Resultsmentioning

confidence: 99%

Behaviour of reinforced concrete beam strengthened in shear with geosynthetic

Majumder

Saha

2020

Advances in Structural Engineering

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“…Bonding FRP materials is a new retrofitting or strengthening method for enhancing shear and flexural performance of existing reinforced concrete (RC) beams [7][8][9]. The effects of FRP materials which are externally bonded to the beams on flexure and/or shear capacity of beams have been investigated by previous experimental and numerical studies [3][4][5], [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In these studies, it is seen that the FRP composites are utilized as externally epoxy-bonded reinforcement to enhance the structural strength and stiffness, ductility and seismic performance of the RC beams.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the flexural behaviour of RC beams wrapped with CFRP

Dalyan¹,

Doran

2021

International Advanced Researches and Engineering Journal

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In addition to conventional retrofitting of constructions, new technologies are rapidly being developed to withstand the external effects while sustaining an acceptable level of damage. Reinforced concrete structures strengthened with fiber reinforced polymer composite materials are becoming more and more widespread in structural applications due to their better mechanical properties, resistance to environmental influences, ease of application and light weight, as well as conventional methods of strengthening. In this study, strengthening technique as a methodology for externally bonded with carbon fiber reinforced polymer (CFRP) sheets to increase the flexural resistance of reinforced concrete beams has been investigated. For this purpose, eight reinforced concrete beams were produced considering different types of CFRP configuration and tested under four-point bending loading. The dimensions of the beams are 150×250×2600 mm and concrete cover of the first and second group of test beam are 20 mm and 40 mm, respectively. Finally, loaddeflection behavior with the failure mechanism of the tested beams have been discussed and the effect of different schemes of strengthening on the flexural behavior has been evaluated.

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“…At present, there are several methods for the strengthening and retrofitting of RC structures with different objectives. Tahsiri et al carried out an experimental and analytical study on the retrofitting of RC beams using fiber reinforcement polymers (FRP) and RC jacketing. Both techniques enhanced strength and energy dissipation capacity.…”

Section: Introductionmentioning

confidence: 99%

Shear strengthening of reinforced concrete beams using prefabricated ultra‐high performance fiber reinforced concrete plates: Experimental and numerical investigation

Sakr

Sleemah

Khalifa

et al. 2019

Structural Concrete

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This paper presents the efficiency of using prefabricated ultra‐high performance fiber reinforced concrete (UHPFRC) plates in shear strengthening of reinforced concrete (RC) beams experimentally and numerically using finite element method. In order to ensure high quality and facilitate the strengthening process on site applications, it has been considered to apply UHPFRC as a plate pasted on concrete surface using epoxy. Tested specimens included four strengthened beams besides three control beams. Strengthening the RC beams was based on the use of two different techniques; (a) one longitudinal side strengthening (b) two longitudinal sides strengthening. Moreover, strengthening RC beams with reinforced or non‐reinforced prefabricated UHPFRC plates was also investigated. Results show that UHPFRC plates significantly increased the maximum load capacity, ductility and mid span reinforcement strain of the strengthened RC beams comparing with reference beam failed in shear. Also, steel connectors used in reinforcement of UHPFRC plates prevented debonding failure mode. A three‐dimensional (3D) finite element model (FEM) of the tested beams was also developed to predict the behavior of these specimens strengthened in shear. The adhesive layer was simulated using cohesive surface model to consider the slippage between concrete surface and UHPFRC plates. Results of the FEM showed good agreement with experimental results, as they were able to predict the behavior of the beams with high accuracy.

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Experimental study of RC jacketed and CFRP strengthened RC beams

Cited by 36 publications

References 17 publications

Behaviour of reinforced concrete beam strengthened in shear with geosynthetic

Behaviour of reinforced concrete beam strengthened in shear with geosynthetic

An investigation on the flexural behaviour of RC beams wrapped with CFRP

Shear strengthening of reinforced concrete beams using prefabricated ultra‐high performance fiber reinforced concrete plates: Experimental and numerical investigation

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