Replacement of steel with GFRP for sustainable reinforced concrete

Sheikh, Shamim A.; Kharal, Zahra

doi:10.1016/j.conbuildmat.2017.12.141

Cited by 32 publications

(9 citation statements)

References 5 publications

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“…The durability of reinforced concrete structures is poor, and steel corrosion aggravates cracking and damage of concrete (Reichenbach et al, 2021). Hence, how to improve the seismic bearing capacity, deformation ability, durability, and serviceability of concrete components or structures, has become an urgent issue to be solved in civil engineering nowadays (Chaboki et al, 2018; Qiu et al, 2020; Sheikh and Kharal, 2018). Remarkably, in recent years, the emergence and rapid development of new smart materials (i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on flexural performance of concrete beams strengthened with SMA-GFRP-ECC smart composite materials

Qian,

Wang,

Wang

et al. 2024

Journal of Intelligent Material Systems and Structures

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The structural performance improvement of concrete members is by far a crucial theoretical issue for engineers, and the development of modern smart and composite materials makes it possible to gradually enhance the durability design of the concrete structure. In this study, six beams of the same size and reinforcement ratio, the proposed composite beam (SMA-GFRP-ECC) and five comparative beams (RC, R-ECC, SS-ECC, GFRP-ECC, SMA-ECC), were designed and tested under low-cycle unidirectional cyclic loading and unloading conditions. The energy dissipation capacity, displacement ductility, residual deformation, and self-repairing performance of each concrete beam were evaluated. Afterward, a concise calculation model for the studied composite beam is deduced and developed based on the existing relevant constitutive models and concrete assumptions. The test results indicate that compared with RC beams, the composite reinforced ECC beams show obvious multi-cracking and smaller crack width during the loading process and have good bending ductility. The innovative SMA-GFRP-ECC beam is capable of a high bearing capacity, ductility, and damage self-repairing. The new proposed beam has more than 80% of the maximum crack width recovery capacity during unloading. Hence, the proposed SMA-GFRP-ECC beam is a rather good first attempt of strengthened beams, combining the advantages of SMA, GFRP, and ECC.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on flexural performance of concrete beams strengthened with SMA-GFRP-ECC smart composite materials

Qian,

Wang,

Wang

et al. 2024

Journal of Intelligent Material Systems and Structures

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“…Glass Fibre Reinforced Polymer (GFRP) bars as an alternative to steel reinforcement in concrete structures have been receiving increased attention over the past two decades [15][16][17][18][19]. Due to its inherent corrosion resistance, GFRP has gained a reputation [20][21][22] as an alternative to steel in RCs to meet the requirements of durability in aggressive environments.…”

Section: Introductionmentioning

confidence: 99%

Making a Case for Hybrid GFRP-Steel Reinforcement System in Concrete Beams: An Overview

2023

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Ageing concrete infrastructures are known to be facing deterioration, especially regarding the corrosion of their reinforcing steel. As a solution, glass fibre-reinforced plastic (GFRP) bars are now considered a reinforcement alternative to conventional steel, and design codes now exist for designing GFRP-RC structures. However, there is a need to improve on addressing the limited plastic yield in GFRPs. Consequently, it is suggested that a hybrid steel–GFRP RC system can enhance the mechanical performance of flexure beams up to the required standard and, at the same time, address the durability concerns of steel-only RC beams. This overview presents the studies conducted to enhance the performance of hybrid GFRP–steel RC beams by reviewing the analytical models proposed to improve the various aspects of reinforcement design. The models consider mechanical effects such as ductility, crack width, flexure and shear, and the physical effects such as thermal stability when exposed to the temperature. Though the evidence reviewed supports the viability of the hybrid GFRP–steel reinforcing system to address ductility, much is still required in the area of research, as highlighted in the future outlook.

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“…These anchors can effectively reduce the weight of structures, improve durability, and simplify the substitution of old materials. However, owing to its anisotropic, non-homogeneous, and linear elastic properties, there is a different anchoring mechanism for GFRP anchors than for conventional steel bars [8].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Test and Numerical Simulation of Anchoring Performance of Embedded Rock GFRP Anchor

Hao,

Liu,

Yan

et al. 2023

Buildings

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Compared to traditional steel reinforcement, GFRP anchors demonstrate outstanding mechanical performance and corrosion resistance, and so they are an ideal substitute for steel reinforcement in anti-floating projects. Based on finite element software, a 3D axisymmetric calculation model of GFRP anti-floating anchors in medium-weathered granite was established in this paper. Combined with the in-situ ultimate pull-out tests, the bonding anchoring performance and bearing characteristics between the anchor body, anchoring mortar, and rock–soil mass were analyzed. The research findings indicated that the cohesive bonding elements exhibited a high degree of conformity in defining the interface contact relationship of the GFRP anti-floating anchor anchoring system. The axial force of the GFRP anti-floating anchor body is “attenuated” along the depth direction, and there was a critical value of anchoring length; under the same conditions, the reasonable anchoring length should be 3.5~5.0 m. All the anchors in the in-situ tests exhibited interfacial shear slip failure between the anchor body and the anchor mortar, with an average maximum load of 450 kN, which is consistent with the maximum failure load of the simulated anchors. Compared to a load of 50 kN, the maximum stress of the anchor mortar increased by 50% under a load of 450 kN. The displacement variation of the surrounding rock–soil mass showed a decreasing trend from the inside to the outside and from the top to the bottom. The research results provided valuable references for the optimization design of GFRP anti-floating anchors.

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Replacement of steel with GFRP for sustainable reinforced concrete

Cited by 32 publications

References 5 publications

Experimental investigation on flexural performance of concrete beams strengthened with SMA-GFRP-ECC smart composite materials

Experimental investigation on flexural performance of concrete beams strengthened with SMA-GFRP-ECC smart composite materials

Making a Case for Hybrid GFRP-Steel Reinforcement System in Concrete Beams: An Overview

In-Situ Test and Numerical Simulation of Anchoring Performance of Embedded Rock GFRP Anchor

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