Flexural Strength of Concrete Beam Reinforced with CFRP Bars: A Review

Bakar, Mohd Basri Che; Rashid, Raizal Saifulnaz Muhammad; Amran, Mugahed; Jaafar, Mohd Saleh; Vatin, Nikolai; Fediuk, Roman

doi:10.3390/ma15031144

Cited by 33 publications

(16 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The required steel reinforcement is then calculated to enhance the mechanical performance of structural elements such as ductility, tensile strength, and creep resistance [ 2 , 3 , 4 , 5 , 6 , 7 ]. Finally, the ultimate limit state and serviceability limit state requirements provided by design codes are checked [ 8 , 9 , 10 , 11 ]. If any design provision is not satisfied, the concrete dimensions should be adjusted, and accordingly, re-analysis of the structure is performed [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Reinforced Concrete Materials in Construction

2022

View full text Add to dashboard Cite

The structural design process is iterative and involves many design parameters. Thus, this paper presents a controlled framework for selecting the adequate structural floor system for reinforced concrete buildings and efficiently utilizing the corresponding construction materials. Optimization was performed using an evolutionary algorithm to minimize the total construction cost, considering the costs of concrete, steel reinforcement, formwork, and labor. In the problem formulation, the characteristic compressive strength of concrete was treated as a design variable because it affects the mechanical performance of concrete. The design variables included the column spacings, concrete dimensions, and steel reinforcement of different structural components. The constraints reflected the Egyptian code of practice provisions. Because the choice of the structural floor system affects the design details, three systems were considered: solid slabs, flat slabs with drop panels, and flat slabs without drop panels. Two benchmark examples were presented, and the optimal design results of the structural floor systems were compared. The solid slab system had the lowest construction cost among the three structural floor systems. Comparative diagrams were developed to investigate the distribution of construction costs of each floor system. The results revealed that an adequate choice of design variables could save up to 17% of the building’s total construction cost.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimal Design of Reinforced Concrete Materials in Construction

2022

View full text Add to dashboard Cite

show abstract

“…To avoid the CFRP-reinforced concrete beams' sudden brittle failure, most design codes suggest designing the sections as under-reinforced sections [14,[31][32][33][34][35][36][37]. The CFRP under-reinforced sections have experienced a less catastrophic failure with excessive deflection and wide cracks due to the lower elasticity modulus of CFRP compared to the conventional steel [38][39][40][41][42][43]. Although the modulus of elasticity of CFRP is lower than steel, it is four to five times higher than the elastic modulus of GFRP (See Table 1).…”

Section: Introductionmentioning

confidence: 99%

“…In return, CFRP beams have shown higher flexural strength compared to GFRP beams. However, the behavior of concrete beams reinforced by CFRP and GFRP under different conditions is still under study, GFRP reinforced behavior has experienced higher deflection and wider cracks than conventional steel 000018-3 reinforcement [42]. The low elastic modulus of GFRP, compared to steel, results in low post-cracking stiffness compared to conventional reinforced concrete beams [42].…”

Section: Introductionmentioning

confidence: 99%

Structural response of high strength concrete beams using fiber reinforced polymers under reversed cyclic loading

Guo¹

2022

Sustain. Struct.

View full text Add to dashboard Cite

This paper investigates the response of high strength concrete (HSC) beams subjected to reversed cyclic loading using carbon fiber-reinforced polymer (CFRP), glass fiber-reinforced polymers (GFRP), and hybrid FRP/steel bars as bottom tensile reinforcement. Five HSC beams with a rectangular cross-section were prepared and poured using with a 28-day concrete compressive strength of 60 MPa (8.7 ksi). A displacement-controlled reversed cyclic loading has been applied to all the beams. The test setup has been designed to represent seismic effect on structures. Flexural capacity, concrete and reinforcement steel strains, cracking behavior, and ductility results were obtained. The hybrid steel/FRP has shown an improved performance in terms of flexural capacity, strains, and ductility. While the inclusion of FRP grids reduces the flexural capacity, this can be improved by adding more layers of FRP. Overall, the nominal moment of the hybrid sections were the highest between all beams. The ACI 318 code’s empirical equations showed close results in terms of the tensile strength of the FRP. The ACI 440R has shown overestimated nominal moment values compared to the experimental results.

show abstract

“…Compared to steel, FRP composites are not only immune to corrosion but also offer extraordinary tensile resistance [ 18 , 19 ]. It is therefore finding use as fiber-reinforced concrete structures [ 20 , 21 , 22 , 23 ], strengthening jacket systems [ 24 , 25 , 26 , 27 ], or reinforcing bars [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ] in infrastructure. Special attention should be given to FRP bars reinforced concrete, where the majority of the tensile load is expected to be carried by FRP bars.…”

Section: Introductionmentioning

confidence: 99%

“…Similar conclusions were made by [ 38 ], where CFRP bars were shown to have excellent performance for coral concrete beams. Bakar et al reviewed the failure mechanisms and common analytical models for evaluating the flexural strength of concrete beams reinforced by CFRP bars [ 31 ]. Protchenko et al examined the theoretical models and experimental results of FRP reinforced concrete beams and proposed a new model for predicting the ultimate bending capacity of reinforced beams [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Zhou

Guo-juan

et al. 2022

Polymers

View full text Add to dashboard Cite

In response to resource shortage and carbon dioxide emissions, an innovative type of sustainable concrete containing LC3, seawater, sea sand, and surface-treated recycled aggregates is proposed in this study to replace traditional concrete. To understand the bond properties between the sustainable concrete and CFRP bars, an investigation was conducted on the bond behavior between sand-coated CFRP bars and advanced sustainable concrete. Pull-out tests were carried out to reveal the failure mechanisms and performance of this bond behavior. The results showed that the slip increased monotonically along with the increase in confinement. The bond strength increased up to approximately 15 MPa, and the critical ratio of C/D was reached. The critical ratio approached 3.5 for the Portland cement groups, while the ratio was determined as approximately 4.5 when LC3 was introduced. When the proportion of LC3 reached 50%, there was a reduction in bond strength. A multisegmented modified bond–slip model was developed to describe the four-stage bond behavior. In terms of bond strength and slip, the proposed advanced concrete exhibited almost identical bond behavior to other types of concrete.

show abstract

Flexural Strength of Concrete Beam Reinforced with CFRP Bars: A Review

Cited by 33 publications

References 56 publications

Optimal Design of Reinforced Concrete Materials in Construction

Optimal Design of Reinforced Concrete Materials in Construction

Structural response of high strength concrete beams using fiber reinforced polymers under reversed cyclic loading

Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Contact Info

Product

Resources

About