Flexural response of reinforced concrete (RC) beams strengthened with near surface mounted (NSM) fibre reinforced polymer (FRP) bars

Sharaky, I.A.; Torres, Lluís; Comas, Joaquím; Barris, Cristina

doi:10.1016/j.compstruct.2013.10.051

Cited by 190 publications

(90 citation statements)

References 26 publications

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“…The last stage occurred between the steel yielding and the failure of slab. At this stage, the steel has yielded whereas the CFRP rods behaviour is elastic and control the crack widths until failure (Sharaky et al 2014). Moreover, the increase of deflection has a higher rate than the previous stage.…”

Section: Load Deflection Relationshipmentioning

confidence: 97%

Flexural Behavior of Fire-Damaged Reinforced Concrete Slabs Repaired with Near-Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) Rods

Cao

Pansuk

Torres

2015

ACT

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After fire, the decrease in load capacity of reinforced concrete (RC) structure will take place and may lead to a damage. This research brings out a method to repair flexural reinforced concrete members after fire by using near-surface mounted (NSM) carbon fiber reinforced polymer (CFRP) rods. In this study, a series of slabs were conducted to evaluate the flexural behavior of fire-damaged RC structures strengthened with NSM CFRP rods and repairing material. The arrangement or the location of NSM CFRP rods were the main factor that had been considered to evaluate the effectiveness of this method. Besides, the direct bond test of C-shaped specimens was carried out to investigate the bond behavior between CFRP rods and concrete in three different embedding positions of CFRP rods. Based on the experimental databases, it is clear to conclude that the strengthened slabs not only improved endurance limits but also improved load-carrying capacities and stiffness values as compared to control slab and fire-damaged slab. Especially, the test results showed that slabs with CFRP rods embedded in repairing material overlay had more load-carrying capacity than slabs with CFRP rods embedded inside concrete or between concrete and repairing material overlay.

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Section: Load Deflection Relationshipmentioning

confidence: 97%

Flexural Behavior of Fire-Damaged Reinforced Concrete Slabs Repaired with Near-Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) Rods

Cao

Pansuk

Torres

2015

ACT

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“…I. A. Sharaky ir kiti (Sharaky et al 2014) nagrinėjo gelž-betonines sijas, sustiprintas anglies pluošto kompozito daug gelžbetoninių sijų, sustiprintų įtemptaisiais CFRP lakštais, pritvirtintais EBR metodu, tyrimams panaudojo sijas, kurių plotis didesnis už aukštį.…”

Section: įVadasunclassified

Flexural Reinforced Concrete Elements, Strengthened with Fibre Reinforced Polymer, Bearing Capacity Evaluation According to Limit Crack Depth

Šlaitas

2017

Science - Future of Lithuania

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2017 © Straipsnio autoriai. Leidėjas VGTU leidykla "Technika". Šis straipsnis yra atvirosios prieigos straipsnis, turintis Kūrybinių bendrijų (Creative Commons) licenciją (CC BY-NC 4.0), kuri leidžia neribotą straipsnio ar jo dalių panaudą su privaloma sąlyga nurodyti autorių ir pirminį šaltinį. Straipsnis ar jo dalys negali būti naudojami komerciniams tikslams. Reikšminiai žodžiai: gelžbetonis, pluoštu armuotas kompozitas, laikomoji galia, betono irimas, plyšio aukštis. MOKSLAS -LIETUVOS ATEITIS SCIENCE -FUTURE OF LITHUANIA

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“…Generally, we can classify FRP systems into two categories: externally bonded reinforcement (EBR), when FRP sheets, plates, or strips are bonded to the surface of the concrete; and near-surfacemounted (NSM), when circular or rectangular FRP bars or strips are installed and bonded in the grooves of the concrete surface. [19][20][21][22][23][24][25][26][27][28][29][30] Seven typical failure modes could be distinguished for RC structures strengthened with FRP: 18 (1) flexural failure caused by FRP rupture, (2) flexural failure caused by crushing of compressive concrete, (3) shear failure, (4) separation of concrete cover of tensile reinforcement, (5) interfacial debonding in FRP plate end, (6) interfacial debonding caused by flexural crack in midspan of the beam, and (7) interfacial debonding caused by intermediate flexural shear crack. Failure mode caused by FRP rupture (mode 1) is appreciated, because, in such case, the full strength of FRP would be used.…”

Section: Introductionmentioning

confidence: 99%

“…The experimental results are collected from different scientific publications. 19,20,[22][23][24][25][26][27] A focus is made on the assessment of crack depth of critical normal section and evaluation of FRP strainstress relationship. The stiffness of strengthened flexural RC members is reduced because of the slippage between concrete and FRP.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

Šlaitas

Valivonis

Juknevičius

et al. 2018

Advances in Mechanical Engineering

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The article examines the behavior of flexural reinforced concrete members, strengthened with fiber-reinforced polymers (FRP), under the ultimate loading conditions (in fracture stage). One of the main problems of such elements is sudden and brittle failure mode caused by FRP debonding. The method for the calculation of load-bearing capacity of the normal section of flexural reinforced concrete members, strengthened with various types of FRP, is proposed in this article. This method is based on the theory of fracture mechanics of solids. The reduction of overall member stiffness due to the slip between concrete and FRP is estimated by reducing the FRP stress according to the built-up bars theory. Such reduction allows the prediction of load-bearing capacity of strengthened members sufficiently precisely even for sudden and brittle FRP debonding failure mode. The numerical results are compared with experimental ones. In total, 55 reinforced concrete beams, strengthened with externally bonded or near surface mounted carbon fiber-reinforced polymer and glass fiber-reinforced polymer sheets, plates, strips, and rods, are analyzed in this comparison. Experimental results were collected from various scientific publications. A focus is made on the depth of the crack in critical normal section and FRP strain-stress relationship.

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Flexural response of reinforced concrete (RC) beams strengthened with near surface mounted (NSM) fibre reinforced polymer (FRP) bars

Cited by 190 publications

References 26 publications

Flexural Behavior of Fire-Damaged Reinforced Concrete Slabs Repaired with Near-Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) Rods

Flexural Behavior of Fire-Damaged Reinforced Concrete Slabs Repaired with Near-Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) Rods

Flexural Reinforced Concrete Elements, Strengthened with Fibre Reinforced Polymer, Bearing Capacity Evaluation According to Limit Crack Depth

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

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