On the parameters influencing the performance of reinforced concrete beams strengthened with FRP plates

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Farid; Shahin, Khaled; Widiarsa, Ida Bagus Rai

doi:10.1016/s0263-8223(02)00120-4

Cited by 21 publications

(8 citation statements)

References 2 publications

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“…Karbhari 4 suggested that substantial research is required to examine the durability of FRP strengthening systems in terms of moisture-rich zones at the concrete-adhesive/resin interface since previous research conducted by Karbhari has shown that delamination or separation through freeze-thaw cycling or dramatic temperature cycling can occur. The influence of a Poisson ratio mismatch between the concrete and the FRP on the delamination behaviour was conducted by Taheri et al 5 . It was found that the higher the Poisson ratio mismatch between the concrete and the FRP was, the earlier the likelihood of the onset of FRP delamination.…”

Section: Damage/deterioration Mechanismsmentioning

confidence: 99%

Developing an SHM system for FRP-strengthened beams

Newhook

2005

SPIE Proceedings

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Fibre reinforced polymer (FRP) laminates are used to rehabilitate concrete beams that do not possess the required ultimate flexural capacity. Because this is a new technology, there is a need to use structural health monitoring techniques in many of the field projects to verify their field performance and increase user confidence. This paper discusses the process of developing an SHM system for concrete beams with FRP flexural strengthening laminates. In the specific case of FRP laminates, debonding or delamination is a damage mechanism of specific concern. Through an experimental and theoretical study it is shown that strain monitoring would be the most effective technique for this application. Due to the need for a dense spatial resolution of sensors with low noise, Brillouin scatter or multi-Bragg grating style fibre optic sensors are suggested as the most appropriate for this application. A damage assessment methodology based of the shape of the laminate strain profile is established. While the precise methodology is specific to this application, the process of SHM system development discussed in the paper is adaptable to a wide range of field structures.

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Section: Damage/deterioration Mechanismsmentioning

confidence: 99%

Developing an SHM system for FRP-strengthened beams

Newhook

2005

SPIE Proceedings

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“…The use of Fiber reinforced polymers (FRP) for strengthening reinforced concrete was utilized in construction with their excellent mechanical properties of its strong plasticity, corrosion resistance, tensile and fatigue level [1][2][3]. This provides an excellent material to take the tensile force to strengthen concrete structures in flexure [4][5][6]. Many research works have been conducted to investigate the flexural behavior of FRP-reinforced concrete beam [7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Fracture Behaviors of Concrete Beams Strengthened with FRP Sheet of Different Width

Zhang¹

2016

IJMSA

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A total of six beams have been tested to investigate the influence of FRP sheet on the mechanical behavior of concrete beam with different FRP sheet width. In addition, the failure mode of the concrete beam and FRP reinforced concrete beams were also studied by numerical simulation method named Realistic Failure Process Analysis (RFPA). The results indicate that, the loading capacity is increased and maximum deflection of the concrete beam is also increased with the increasing of the FRP sheet width. Moreover, the interfacial debonding easily propagates along the interfacial concrete layer at a load that is below the estimated maximum strength of the FRP-strengthened structure. The maximum strength of the FRP sheet in the experiment was not achieved due to the adhesive layer between the concrete and FRP sheet was not strong enough compared with the numerical simulation result. It showed that the FRP sheet width was considered to be an important factor influence the failure mode and load capacity. So does the interface between the concrete and FRP plate.

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“…Installation of externally bonded upgradation systems using FRP is fast and less labour intensive. Tension delamination of concrete cover in midspan of FRP strengthened beams by combining Carbon Fibre Reinforced Polymer sheets (CFRP) and Glass Fibre Reinforced Polymer sheet (GFRP) sheets at midspan of a beam and wrapped on 3 sides of the beam continuously with unidirectional CFRP on the tension of the beams and bi-directional GFRP sheet [1,2] . The flexural strengthening of reinforced concrete continuous beams with different arrangements of internal steel bars and external CFRP laminates are used for estimating the flexural load capacity and the interface shear stresses between the adhesive and concrete at failure of beams [3] .…”

Section: Introductionmentioning

confidence: 99%

Strength Modeling of Reinforced Concrete Beam with Externally Bonded Fibre Reinforcement Polymer Reinforcement

Pannirselvam¹,

Raghunath²,

Suguna³

2008

American J. of Engineering and Applied Sciences

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This research study presents the evaluation of the structural behaviour of reinforced concrete beams with externally bonded Fibre Reinforced Polymer (FRP) reinforcements. Three different steel ratios with two different Glass Fibre Reinforced Polymer (GFRP) types and two different thicknesses in each type of GFRP were used. Totally fifteen rectangular beams of 3 m length were cast. Three rectangular beams were used as reference beam (Control Beams) and the remaining were fixed with GFRP laminates on the soffit of the rectangular beam. The variables considered for the study includes longitudinal steel ratio, type of GFRP laminates, thickness of GFRP laminates and composite ratios. Flexural test, using simple beam with two-point loading was adopted to study the performance of FRP plated beams interms flexural strength, deflection, ductility and was compared with the unplated beams. The test results show that the beams strengthened with GFRP laminates exhibit better performance. The flexural strength and ductility increase with increase in thickness of GFRP plate. The increase in first crack loads was up to 88.89% for 3 mm thick Woven Rovings GFRP plates and 100.00% for 5 mm WRGFRP plated beams and increase in ductility interms of energy and deflection was found to be 56.01 and 64.69% respectively with 5 mm thick GFRP plated beam. Strength models were developed for predicting the flexural strength (ultimate load, service load) and ductility of FRP beams. The strength model developed give prediction matching the measurements.

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On the parameters influencing the performance of reinforced concrete beams strengthened with FRP plates

Cited by 21 publications

References 2 publications

Developing an SHM system for FRP-strengthened beams

Developing an SHM system for FRP-strengthened beams

Experimental Study on Fracture Behaviors of Concrete Beams Strengthened with FRP Sheet of Different Width

Strength Modeling of Reinforced Concrete Beam with Externally Bonded Fibre Reinforcement Polymer Reinforcement

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