Bond Behavior between Fiber-Reinforced Polymer Laminates and Concrete

Nakaba, Kasumassa; Kanakubo, Toshiyuki; Furuta, Tomoki; Yoshizawa, Hiroyuki

doi:10.14359/10224

Cited by 72 publications

(19 citation statements)

References 3 publications

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“…The strain profiles along the plate at different load levels are plotted in Figure 3(b). As widely observed in the tests (Dai et al, 2005;Nakaba et al, 2001;Zhou et al, 2010), there exist significant local fluctuations in these curves, which indicates displacement discontinuities caused by local material variations (i.e. distribution of the coarse aggregates) and cracking along the concrete-FRP interface.…”

Section: Typical Interfacial Slip and Frp Strain Distributionsmentioning

confidence: 52%

New equations of fibre reinforced polymers-concrete bond strength and bond-slip law based on mesoscale simulations

Yang

2023

Advances in Structural Engineering

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The bond behaviour between fibre reinforced polymers (FRP) and concrete plays a critical role in FRP-strengthened concrete structures. Most existing equations of bond strength and bond-slip laws ignore the heterogeneous nature of concrete, resulting in considerable disparities with experimental data. In this study, the mesoscale finite element modelling approach developed and validated previously is applied in extensive Monte Carlo simulations (MCS) of FRP-concrete bonded joints with various concrete compressive strength and coarse aggregate fractions ( AF). Based on the MCS results, AF-dependent empirical equations for the bond strength and the interfacial bond-slip law are proposed and validated against 101 FRP-concrete joint tests under single-shear loading. The consideration of AF leads to closer predictions of bond strength and force-displacement curves to the test data than the widely-accepted Chen and Teng’s bond-strength model and Lu et al.’s bond-slip law.

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Section: Typical Interfacial Slip and Frp Strain Distributionsmentioning

confidence: 52%

New equations of fibre reinforced polymers-concrete bond strength and bond-slip law based on mesoscale simulations

Yang

2023

Advances in Structural Engineering

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“…To describe the nonlinear bond shear stress -slip relation (Fig. 1.19a), Nakaba et al (Nakaba et al 2001) applied Popovics (Popovics, 1973) model of nonlinear concrete stress -strain relationship for EBR FRP laminates:…”

Section: Fracture Energy Based Modelsmentioning

confidence: 99%

Flexural behaviour of reinforced concrete members strengthened with prestressed CFRP laminate

Šlaitas¹

2021

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Disertacija rengta 2016-2021 metais Vilniaus Gedimino technikos universitete. Vadovas prof. dr. Juozas VALIVONIS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002).Vilniaus Gedimino technikos universiteto Statybos inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. dr. Romualdas KLIUKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002). Nariai:prof. dr. Darius BAČINSKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002), dr. Nicholas FANTUZZI (Bolonijos universitetas, Italija, statybos inžinerija -T 002), prof. habil. dr. Gintaris KAKLAUSKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002), prof. dr. Vitoldas VAITKEVIČIUS (Kauno technologijos universitetas, statybos inžinerija -T 002). Disertacija bus ginama viešameStatybos inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2021 m. birželio 11 d. 10 val. Vilniaus Gedimino technikos universiteto senato posėdžių salėje.

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“…The bond behaviour of the interface can be described in terms of the shear stresses ( τ b ) and the slip ( s ) of the laminate from the substrate. Several models can be found in the literature coming from experimental assessment and simplifications [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. The bond behaviour is often well represented by a bilinear bond law ( Figure 1 , Equation (1)) with an initial ascending branch up to the maximum shear stress τ b 1 (bond strength), followed by a linear descending branch (due to the damage of materials) until the maximum slip s 0 .…”

Section: Introductionmentioning

confidence: 99%

Assessment of fib Bulletin 90 Design Provisions for Intermediate Crack Debonding in Flexural Concrete Elements Strengthened with Externally Bonded FRP

Barris

Jahani

et al. 2023

Polymers

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With the assessment of intermediate crack debonding (ICD) being a subject of main importance in the design of reinforced concrete (RC) beams strengthened in flexure with externally bonded fibre-reinforced polymer (FRP), several approaches to predict the debonding loads have been developed in recent decades considering different models and strategies. This study presents an analysis of formulations with different levels of approximation collected in the fib Bulletin 90 regarding this failure mode, comparing the theoretical predictions with experimental results. The carried-out experiments consisted of three RC beams strengthened with carbon FRP (CFRP) tested under a four-point bending configuration with different concrete strengths and internal steel reinforcement ratios. With failure after steel yielding, higher concrete strength, as well as a higher reinforcement ratio, lead to a higher bending capacity. In addition, the performance of the models is assessed through the experimental-to-predicted failure load ratios from an experimental database of 65 RC beams strengthened with CFRP gathered from the literature. The results of the comparative study show that the intermediate crack debonding failure mode is well predicted by all models with a mean experimental-to-predicted failure load ratio between 0.96 and 1.10 in beams tested under three- or four-point bending configurations.

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Bond Behavior between Fiber-Reinforced Polymer Laminates and Concrete

Cited by 72 publications

References 3 publications

New equations of fibre reinforced polymers-concrete bond strength and bond-slip law based on mesoscale simulations

New equations of fibre reinforced polymers-concrete bond strength and bond-slip law based on mesoscale simulations

Flexural behaviour of reinforced concrete members strengthened with prestressed CFRP laminate

Assessment of fib Bulletin 90 Design Provisions for Intermediate Crack Debonding in Flexural Concrete Elements Strengthened with Externally Bonded FRP

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