Numerical investigation of hybrid FRP reinforced beams

Al-Rahmani, Abdullah; Abed, Farid

doi:10.1109/icmsao.2013.6552565

Cited by 19 publications

(10 citation statements)

References 4 publications

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“…In addition to experimental work, finite element methods have been also widely used to simulate the FRP-strengthened beams and columns under different loading and environmental conditions [36][37][38][39][40][41][42][43]. In these studies, different types of FRP material (i.e., carbon, glass, and basalt) have been considered as NSM or EBR reinforcement, and both the flexural and shear performance of the strengthened members have been validated.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Effect of High Service Temperature on the Flexural Performance of Near-Surface Mounted (NSM) Carbon Fiber-Reinforced Polymer (CFRP)-Strengthened Concrete Beams

et al. 2021

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This paper presents a study of the effect of high service temperature (near or beyond glass transition temperature (Tg) of structural epoxy adhesive) on the behavior of near-surface mounted (NSM) carbon fiber-reinforced polymer (CFRP)-strengthened reinforced concrete (RC) beams. The study includes experimental work as well as analytical and numerical analysis. To this end, fourteen beams have been tested up to failure in two different series. In series 1, specimens with three different CFRP areas have been tested at two different temperatures (i.e., 20 and 40 °C). In series 2, and with the aim of evaluating the effect of higher temperatures, only one CFRP area was tested under four different temperatures (i.e., 20, 60, 70, and 85 °C). Experimental results are evaluated in terms of load–deflections, failure modes, and bond performance. Furthermore, the experimental load–deflection curves are satisfactorily compared to both analytical predictions and finite element (FE) numerical simulations. In both cases, shrinkage and temperature effects on the short-term response of flexural elements have been accounted for. No significant reduction in stiffness and ultimate load was observed for specimens being tested up to 60 °C (in the range of epoxy Tg), showing FRP rupture failure in all of them. For specimens under 70 and 85 °C, the failure mode changed from FRP rupture to FRP end debonding and concrete crushing, respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of the Effect of High Service Temperature on the Flexural Performance of Near-Surface Mounted (NSM) Carbon Fiber-Reinforced Polymer (CFRP)-Strengthened Concrete Beams

et al. 2021

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“…The finite element (FE) procedure implemented in this study is the development and verification of nonlinear FE model in order to simulate the behavior of all beams subject to three points bending, and the failure mode of beams, 46 by using the commercial software ABAQUS. The numerical study was carried out on the 10 variants of beams.…”

Section: Finite Element Modelingmentioning

confidence: 99%

“…The model used is a linear eight-node threedimensional solid element with reduced integration (C3D8R) and for 3D solid element, having three degrees of freedom per node, which gives a perfect treatment for most applications. 46,47 For the composite materials (CFRP, GFRP, and JFRP), shaped as plate bonded to the bottom surfaces and sides of the beams, they are modeled in 3D solid type deformable as shown in Figure 9. The supports used in the model were defined as analytical rigid parts, a reference point was assigned at the middle of the analytical rigid support and a roller support near the beam end is represented by a boundary condition that restricts the displacement in the global Z direction.…”

Section: Model Geometrymentioning

confidence: 99%

Strengthening in flexure–shear of RC beams with hybrid FRP systems: Experiments and numerical modeling

Djeddi

Ghernouti

Abdelaziz

et al. 2016

Journal of Reinforced Plastics and Composites

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This paper presents an experimental and numerical investigation of reinforced concrete beams strengthening by means of different combinations of externally bonded hybrid fabrics-reinforced polymer composite: Carbon and glass fabric–reinforced polymer composite and another fabric-reinforced polymer composite based on vegetable fiber it is the jute fiber. The objective of this study is the conjugation of the properties of each type of fiber fabric to increase the load capacity, rigidity, and ductility of reinforced concrete beams and obtaining a typical model of reinforcement beams, which provides both these three desired mechanical properties. Three control beams and 27 beams strengthened in flexural–shear with Carbon, glass, and jute fabric–reinforced polymer composite and hybrid fiber fabrics were conducted and tested under three points bending. The load–deflection response, ductility, and associated failure modes of the tested specimens have been recorded and analyzed. In addition to the experimental investigations, numerical simulation using ABAQUS was developed to predict the load–deflection response and the failure modes, the results were compared with the corresponding experimental results, a good correlation was obtained.

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“…Other studies investigated the effect of high temperatures on the performance of FRP bars [ 18 ]. Hybrid reinforcements of steel and FRP bars were also examined for slender beams under flexure [ 19 , 20 ]. However, limited research has been conducted on investigating the compressive response of FRP bars [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of FRP Bars under Compression and Their Performance in RC Columns

AlNajmi

Abed

2020

Materials

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The behavior of fiber-reinforced polymer (FRP) bars under compression is not fully understood yet due to the limited research in this area. However, the long-term durability, weathering resistance, and exceptional mechanical properties of FRP bars justify the need for their use in compression members. The main objectives of this study are to evaluate the mechanical properties of glass FRP (GFRP) and basalt FRP (BFRP) bars under compression and examine their performances as main longitudinal reinforcements in reinforced concrete (RC) columns. In the first part of this research, a series of static compression tests were conducted on GFRP and BFRP bars of different diameters. The second part of this research numerically investigated the behavior of FRP-RC columns under concentric and eccentric loading using the mechanical properties of the FRP bars obtained experimentally. Nonlinear finite element models were developed to simulate the compressive behavior of the concrete columns reinforced with GFRP and BFRP bars. The FE models were verified with the experimental results conducted previously. The verified FE models are then utilized to conduct a parametric analysis considering two different column geometries and cross-sections, five reinforcement ratios, two concrete compressive strengths, three types of ties materials, and several loading eccentricities to develop a set of interaction diagrams that may provide valuable data for design purposes. The results indicated that the FRP bars could have a significant contribution to the overall capacity of FRP-RC columns by up to 35% of the total force at failure, depending on the reinforcement ratio. The performance of both the GFRP- and BFRP-RC columns was almost similar in terms of capacity, deflection, and bar strength contribution.

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Numerical investigation of hybrid FRP reinforced beams

Cited by 19 publications

References 4 publications

Experimental Study of the Effect of High Service Temperature on the Flexural Performance of Near-Surface Mounted (NSM) Carbon Fiber-Reinforced Polymer (CFRP)-Strengthened Concrete Beams

Experimental Study of the Effect of High Service Temperature on the Flexural Performance of Near-Surface Mounted (NSM) Carbon Fiber-Reinforced Polymer (CFRP)-Strengthened Concrete Beams

Strengthening in flexure–shear of RC beams with hybrid FRP systems: Experiments and numerical modeling

Evaluation of FRP Bars under Compression and Their Performance in RC Columns

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