Structural behaviour of pre-damaged reinforced concrete beams strengthened with natural fibre reinforced polymer composites

Jirawattanasomkul, Tidarut; Likitlersuang, Suched; Wuttiwannasak, Nattamet; Ueda, Tamon; Zhang, Dawei; Shono, Marin

doi:10.1016/j.compstruct.2020.112309

Cited by 67 publications

(17 citation statements)

References 26 publications

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“…Jute fibre reinforced polymer (JFRP) composites were investigated by Jirawattanasomkul et al [ 19 ] for usage as an exterior strengthening fabric for reinforced concrete (RC) beams in the region of shear. JFRP greatly enhanced the shear strength of beams, per the findings of the tests and as shown in Table 4 .…”

Section: External Bonded Nfrp Strengthening Techniques Adopted In Pas...mentioning

confidence: 99%

“…Also, these fabrics can be utilized to envelop the beam in the form of a U-shape, engulfing the soffit and 2 sides of the beams with the same anchoring system through the use of an adhesive. This method is most often adopted to improve the shear and torsional strength of RC beams [ 19 , 20 ]. It can be applied to tunneling, bridge decks, slabs, dock loading, thin unbonded overlays, concrete plinths and platforms, and concrete sheets [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Effiong

Ede

2022

Materials

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Developing more resilient and sustainable physical infrastructure increases the demand for sustainable materials and strengthening approaches. Many investigations into strengthening RC beam structures have used either externally bonded (EB) or near-surface mounted (NSM) systems with synthetic fibre reinforced polymer composites. These synthetic fibres are unsustainable since they involve the use of nonrenewable resources and a large amount of energy. Research shows that natural fibre reinforced polymer (NFRP) composites may be an alternative to synthetic FRP composites in the strengthening of concrete beams. However, there is limited literature that validates their performance in various structural applications. Hence, the purpose of this paper is to explore the advances, prospects, and gaps of using EB/NSM NFRP techniques in strengthening concrete beams to provide areas for future research directions. The NSM FRP technique provides improved strengthening effects and mitigates the concerns associated with the EB system, based on a wider range of applications using synthetic FRPs. However, the NSM NFRP strengthening technique has been underutilized, though the EB NFRP system has been more commonly explored in reviewed studies. The knowledge gaps and areas for proposed future research directions are essential in developing work in emerging NFRPs and strengthening techniques for sustainable infrastructure.

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Section: External Bonded Nfrp Strengthening Techniques Adopted In Pas...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Effiong

Ede

2022

Materials

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“…Recently, a possible solution was proposed to replace these synthetic fibers using natural fibers [35,36]. Salient features of natural FRPs include their substantial low costs in comparison to synthetic FRPs and do not carry risk to skin diseases as associated with synthetic FRPs [37][38][39][40]. There are several drawbacks of natural FRPs such as higher moisture absorption, inferior fire resistance, lower mechanical proper-ties and durability.…”

Section: Introductionmentioning

confidence: 99%

Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

et al. 2022

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Each year, massive amount of construction waste is generated that needs proper attention in terms of its disposal without deteriorating surrounding environment. A significant portion of this waste comprises bricks. Besides, large number of new construction works are resulting in the depletion of natural resources rapidly. Intuitively, a sustainable solution demands to consume this construction waste in the best way possible. This study targeted brick waste as a potential material to be used as a partial replacement of natural aggregates in structural concrete. It has been known that the concrete constructed with recycled brick aggregates possesses substandard mechanical properties. Traditionally, synthetic FRPs are known to strengthen recycled aggregate concrete. However, recognizing high costs associated with them, this study proposed the use of natural hemp fiber ropes to strengthen recycled aggregate concrete constructed with brick aggregates. To assess the efficacy of hemp ropes in strengthening mechanical properties of the concrete with coarse aggregates partially replaced with recycled brick aggregates (B-waste), an experimental framework was conducted. Sixteen cylindrical specimens were tested in two groups depending upon the concrete strength. Within each group, 2 specimens each were strengthened with 1, 2, and 3 layers of hemp fiber ropes. Axial monotonic compressive loading was applied to each specimen. Results revealed that hemp fiber ropes significantly improved ultimate compressive strength and the corresponding strain. A substantial improvement in axial ductility was observed. For the sake of performance-based non-linear modelling, accurate constitutive modelling at material level is necessary. For this purpose, several existing analytical stress-strain models were tested in this study to predict ultimate confined compressive strength and strain. It was found that several models predicted confined compressive strengths with reasonable accuracy. However, very few models were able to predict confined peak strain with good accuracy.

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“…Saravana Bavan and Mohan Kumar [ 19 ] analyzed the deflection and stress properties of an NFRC beam by the finite element method (FEM). Jirawattanasomkul et al [ 20 ] investigated the shear behavior of pre-damaged deep reinforced concrete beams strengthened with NFRC sheets by the non-reversed cyclic three-point bending load test. Rajeshkumar and Hariharan [ 21 ] investigated the free vibration of NFRC beams for different fiber gauge lengths under clamped-free boundary condition.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Stability of Natural-Fiber-Reinforced Composite Cylindrical Shells with Initial Geometric Imperfection Considering Moisture Absorption and Hygrothermal Aging

2022

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In this paper, the nonlinear stability of a natural-fiber-reinforced composite cylindrical shell with initial geometric imperfection is investigated. The nonlinear governing equations are established by high-order shear deformation theory. The load-edge shortening curves for different imperfection amplitudes are obtained by the Galerkin method. Several numerical examples are presented to verify the accuracy of the proposed method and to investigate the influence of initial geometric imperfection, moisture absorption, and hygrothermal aging on the post-buckling behavior of natural-fiber-reinforced composite cylindrical shells.

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Structural behaviour of pre-damaged reinforced concrete beams strengthened with natural fibre reinforced polymer composites

Cited by 67 publications

References 26 publications

Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

Nonlinear Stability of Natural-Fiber-Reinforced Composite Cylindrical Shells with Initial Geometric Imperfection Considering Moisture Absorption and Hygrothermal Aging

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