Flexural performance of concrete beams reinforced by gfrp bars and strengthened by cfrp sheets

Hassan, Hassan Falah; Medhlom, Mutaz Kadhim; Ahmed, Abdullah Sinan; Al-Dahlaki, Mohammed H.

doi:10.1016/j.cscm.2020.e00417

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Moreover, GFRP-reinforced concrete beams with a low reinforcement ratio demonstrated a bilinear load-deflection behavior, whereas corresponding beams with a higher reinforcement ratio exhibited a trilinear response. Hassan et al [26] studied the structural performance of concrete beams internally reinforced by GFRP bars and externally strengthened by CFRP sheets. The results of the investigation showed that the use of twin-layer CFRP sheets can increase the flexural strength of beams containing minimum GFRP reinforcement by 95% over the control beam that was not strengthened, leading to a change in the mode of failure from GFRP bars' rupture to concrete crushing.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Rebar Harsh Storage Conditions on the Flexural Behavior of Glass FRP Concrete

Tabsh,

Tamimi,

El-Emam

et al. 2024

Sustainability

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Nowadays, fiber-reinforced polymer (FRP) has become a widely accepted alternative reinforcement to steel bars in concrete members due to its many sustainability traits, as represented by its high strength-to-weight ratio, corrosion resistance, non-conductive properties, and electromagnet neutrality. However, FRP bar exposure for an extended period of time to harsh environmental conditions and chemicals can have an adverse effect on their mechanical properties. In this investigation, glass FRP bars were exposed to indoor controlled temperature, outdoor direct sunlight, outdoor shade, seawater, and alkaline solution for six months prior to using them as reinforcement in concrete flexural members. This research involves the fabrication and testing of five pairs of 3 m-long concrete beams with 200 mm by 300 mm cross-sections embedded in the tension zone with the exposed GFRP bars. The 10 beams were instrumented with strain gauges and tested following a four-point loading scheme using a hydraulic jack attached to a rigid steel frame. Crack width records from the tests showed the inferior serviceability of the beams that contained rebars stored in an outdoor environment relative to the control beams. GFRP bar exposure to an alkaline solution or outdoor direct sunlight slightly affected the cracking and ultimate moment capacities, reducing them by 5% and 3% in terms of the same parameters as the controlled indoor exposure, respectively. The influence of GFRP bar exposure to open-air shade or sunlight decreased the pre-cracking stiffness by 25% and flexural ductility by 10–20% when compared with the control specimens. The predicted ultimate flexural strength using the ACI 440 provisions gave comparable results to the experimentally obtained values. A simple mathematical equation that envelops the moment–deflection relationship for GFRP over-reinforced concrete beams and only requires information about initial cracking and ultimate flexural conditions is proposed.

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Section: Literature Reviewmentioning

confidence: 99%

Effect of Rebar Harsh Storage Conditions on the Flexural Behavior of Glass FRP Concrete

Tabsh,

Tamimi,

El-Emam

et al. 2024

Sustainability

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“…Many researchers have used FRP rebars as an alternative to traditional steel rebars in reinforced concrete members subjected to uniform and cyclic loading (13). Using these products mutually and continuously will lead to a sustainable and economical construction system (14). A number of researchers have investigated the behavior of beams reinforced with FRP bars and made of normal strength concrete (NSC) or high-strength concrete (HSC) and different concretes under flexural loading (15)(16)(17)(18)(19)(20)(21)(22).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the behavior of concrete beams containing recycled materials reinforced with composite rebars

Jafari,

Alizadeh Elizei,

Ziaei

et al. 2023

materconstrucc

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The application of various Fiber Reinforced Polymer (FRP) composite materials is very widespread in the world. The use of recycled materials in concrete, can improve some of the mechanical properties of concrete. In this laboratory research, the behavior of reinforced concrete beams with composite rebars with glass fibers made of concrete containing recycled materials such as glass, rubber and micro-silica with different mixing plans has been investigated. These mixing plans are such that recycled glass and rubber aggregates have replaced a percentage of fine and coarse concrete aggregates, and glass powder and micro-silica have also replaced a percentage of concrete cement. The results showed that the replacement of coarse rubber, glass powder, and micro-silica in concrete materials increases the bending strength and ductility of concrete beam. In examining the microstructure of concrete by Scanning Electron Microscope (SEM) the adhesiveness of the rubber Interfacial Transition Zone (ITZ) in concrete was suitable.

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Finite element modeling of strengthened T-beams with CFRP U-wraps

Assad,

Mhanna,

Hawileh

et al. 2024

AIP Conference Proceedings

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Flexural performance of concrete beams reinforced by gfrp bars and strengthened by cfrp sheets

Cited by 4 publications

References 15 publications

Effect of Rebar Harsh Storage Conditions on the Flexural Behavior of Glass FRP Concrete

Effect of Rebar Harsh Storage Conditions on the Flexural Behavior of Glass FRP Concrete

Experimental investigation of the behavior of concrete beams containing recycled materials reinforced with composite rebars

Finite element modeling of strengthened T-beams with CFRP U-wraps

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