Inclined FRP U-jackets for enhancing structural performance of FRP-plated RC beams suffering from IC debonding

Fu, Bing; Tang, Xin; Li, L.J.; Liu, F.; Lin, Guan

doi:10.1016/j.compstruct.2018.05.074

Cited by 52 publications

(24 citation statements)

References 23 publications

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“…Fu et al. 47 investigated the influence of parameters, including the width, height, and inclination of the U-jackets anchor on the structural performance of the EB strengthened structures. The results showed that the increase in the width and length of the U-jackets anchor was beneficial to its anchorage performance improvement.…”

Section: Anchorage Systems For Frp Laminatesmentioning

confidence: 99%

“…Chen et al 46 studied the effectiveness of RC beams strengthened with BFRP laminates, and the primary conclusions were: with the same amount of FRP materials, the vertical U-jackets anchor was less effective than the inclined one; the load-carrying capacity enhancement induced by the full-wrapped U-jackets anchor was insignificantly higher than that by the partial-wrapped ones. Fu et al 47 investigated the influence of parameters, including the width, height, and inclination of the U-jackets anchor on the structural performance of the EB strengthened structures. The results showed that the increase in the width and length of the U-jackets anchor was beneficial to its anchorage performance improvement.…”

Section: Frp U-jackets Anchorage Systemmentioning

confidence: 99%

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Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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Fiber-reinforced polymer (FRP) composites have been widely used to strengthen the deteriorated reinforced concrete structures due to their outstanding characteristics of light weight, high strength, as well as noncorrosion. A successful strengthening with the FRP composites would equip the existing structures with the prominent improvement in terms of the durability, ductility, and bearing capacity. Current studies indicate that a simple and reliable anchorage system for the FRP composites will help improve the performance of the strengthened structures both efficiently and economically. Up till now, various anchorage systems have been developed for the FRP composites. Therefore, it is necessary to select appropriate anchorage systems according to different needs and establish relevant design specifications. In view of the aforementioned objectives, this paper systematically summarizes the anchoring mechanism of anchorage systems for two commonly used FRP products (FRP laminates and FRP bars) in different strengthened systems. Additionally, a state-of-the-art review as well as the advantages and disadvantages of each anchorage system are presented. Finally, shortcomings in the current state of knowledge and recommendations beneficial to further study are put forward.

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Section: Anchorage Systems For Frp Laminatesmentioning

confidence: 99%

Section: Frp U-jackets Anchorage Systemmentioning

confidence: 99%

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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“…For greater efficiency, FRP tapes are glued at a predefined angle. Study [7] shows that the use of inclined U-shaped laminates glued at the ends of the tested structures at an angle of 45° gives better results than similar gluing at a vertical angle. Gluing of external plates for structural restoration is currently studied as a method of increasing the shear strength and rigidity of reinforced concrete structures.…”

Section: Literature Review and Problem Statementmentioning

confidence: 95%

Strengthening and restoration of damaged reinforced concrete structures with composite plastics

MUKHANBETZHANOVA

BESPAYEV

2022

EEJET

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This paper considers directions to devise methods for restoring the operational suitability of reinforced concrete structures. Mistakes of designers and non-compliance with the concreting technology of monolithic reinforced concrete structures lead to the formation of cracks and deflections of unacceptable size in reinforced concrete beams and floor slabs, as well as to insufficient strength of the elements. Such structures require not only an increase in bearing capacity but also the restoration of the operational suitability of damaged structures. A technique for restoring the serviceability of bendable reinforced concrete structures with increased deflections and excessive crack opening is proposed. To restore bendable reinforced concrete structures, surface reinforcement with pre-stressed fiber-reinforced plastics is suggested, which is ensured by the creation of a building lift in the damaged elements. Fiber-reinforced plastics have a high strain modulus, elastic nature of the diagram, and increased frost resistance; they tolerate fatigue effects well and are resistant to the effects of chemically active substances. Unlike conventional reinforcement methods, surface reinforcement techniques are characterized by high gain efficiency, corrosion resistance, low labor intensity, and short terms of work; they ensure strength increase and provide for economic feasibility. This study's results established that the use of fiber-reinforced plastics not only increases the bearing capacity of reinforced concrete structures but also helps reduce the width of the cracks formed. Thus, it is possible to avoid an increase in the cross-section of structures and reduce the time of operations, which could lead to additional costs

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“…Numerous researches have been carried out on reinforced FRP concrete, the majority focused on flexure and shear. The use of FRP plates, in particular, could be found in the work of Liu Bocciarelli and Pisani (2017) [4][5][6][7][8][9]. The greater number of these Carbon Fiber Reinforced Polymer (CFRP) plates were attached with epoxy resin to the concrete using the dry lay-up method.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have shown that the presence of FRP laminates results in a significant increase in the loadcarrying capacity of retrofitted members. A negative aspect of these CFRP plates is the greater risk of debonding if compared to the wet lay-up sheets and embedded rods and strings [7,8,10,11]. Debonding in the interface is theoretically distinguished in debonding between the CFRP plate and the resin, and the resin to the concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Failure Behavior of Carbon Fiber Reinforced Polymer (CFRP) Strengthened Reinforced Concrete T-beams

Utomo

Khusyeni

Partono

et al. 2021

ced

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Carbon Fiber Reinforced Polymers (CFRP) are widely used as external concrete reinforcement. The behavior of T-beams strengthened in shear and flexure using CFRP sheets and plates was studied to analyze the load carrying capacity and failure mode as compared to conventional concrete members. The bonding response of the plate-to-concrete was investigated by comparing a specimen with a plate anchored at the far ends, one without anchoring. The sheets were in situ wet lay-up, the plate was pre-impregnated and pultruded during manufacturing. The test result suggested that this integrated strengthening method notably improved the load-carrying capacity, it was also demonstrated that anchoring had a positive but insignificant effect on the moment capacity and deformation. The influence of anchoring was noteworthy from the point of view that it shifted the failure mode from debonding to CFRP plate rupture. The most important factors influencing the behavior of CFRP strengthened beams are outlined.

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Inclined FRP U-jackets for enhancing structural performance of FRP-plated RC beams suffering from IC debonding

Cited by 52 publications

References 23 publications

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Strengthening and restoration of damaged reinforced concrete structures with composite plastics

Experimental Investigation on the Failure Behavior of Carbon Fiber Reinforced Polymer (CFRP) Strengthened Reinforced Concrete T-beams

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