Properties and applications of FRP in strengthening RC structures: A review

Amran, Mugahed; Alyousef, Rayed; Rashid, Raizal Saifulnaz Muhammad; Alabduljabbar, Hisham; Hung, Chung-Chan

doi:10.1016/j.istruc.2018.09.008

Cited by 233 publications

(84 citation statements)

References 195 publications

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“…The E f of the carbon fibers is generally between 160 GPa and 450 GPa, and the E m of the matrix resin is about 4.5 GPa [20]. Moreover, the thickness of the resin matrix was considered to be only about 1/11 of the thickness of the whole plate.…”

Section: Resultsmentioning

confidence: 99%

Study on Tensile Properties of CFRP Plates under Elevated Temperature Exposure

et al. 2019

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Elevated temperature exposure has a negative effect on the performance of the matrix resin in Carbon Fiber Reinforced Plastics (CFRP) plates, whereas limited quantitative research focuses on the deteriorations. Therefore, 30 CFRP specimens were designed and tested under elevated temperatures (10, 30, 50, 70, and 90 °C) to explore the degradations in tensile properties. The effect of temperature on the failure mode, stress-strain curve, tensile strength, elastic modulus and elongation of CFRP plates were investigated. The results showed that elevated temperature exposure significantly changed the failure characteristics. When the exposed temperature increased from 10 °C to 90 °C, the failure mode changed from the global factures in the whole CFRP plate to the successive fractures in carbon fibers. Moreover, with temperatures increasing, tensile strength and elongation of CFRP plates decreases gradually while the elastic modulus shows negligible change. Finally, the results of One-Way Analysis of Variance (ANOVA) show that the degradation of the tensile strength of CFRP plates was due to the impact of elevated temperature exposure, rather than the test error.

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Section: Resultsmentioning

confidence: 99%

Study on Tensile Properties of CFRP Plates under Elevated Temperature Exposure

et al. 2019

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“…Additionally, FRP is a typical linear elastic material when one type of fibre is applied in one direction, so there is no additional residual deformation and no deformation lag to influence the strain measurement. 19,20 In this article, the proposed long-gauge FBG sensor was made using basalt FRP as it is much cheaper than carbon FRP, and its mechanical and durability performance is better than that of glass FRP. Figure 3(a) shows the structure of the proposed long-gauge FBG sensor.…”

Section: Long-gauge Optical Fibre Sensors With Frp Packagingmentioning

confidence: 99%

Displacement measurement of a concrete bridge under traffic loads with fibre-reinforced polymer-packaged optical fibre sensors

Tang

Cang

Yao

et al. 2020

Advances in Mechanical Engineering

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Current displacement measurement methods cannot cope with the demands of the long-term measurement of small-or medium-span concrete bridges because of some technology or economic challenges. In this article, a displacement measurement method is proposed for concrete bridges based on fibre-reinforced polymer-packaged optical fibre sensors. The sensing principle and manufacture process of the proposed sensor are introduced as well as the strain sensing property. Then, a relationship is established between the strain and the displacement based on the distributed strain monitoring. Finally, some field tests are implemented using a simply supported concrete bridge. The tests include static loading test, dynamic loading test with specific speeds and dynamic random traffic loading test. The field test results show that the proposed method can measure the displacement of concrete bridges under traffic loads with reasonable accuracy. Moreover, different types of sensor distributions are proposed to investigate the displacement measurement effects to optimise the sensor installation. Although the sensors cover only some key parts of the girder, the results also verify the accuracy of the proposed method. Therefore, the proposed method can be implemented in concrete bridges in future.

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“…A common technique for FRP application is wet lay-up whereby it involves the attachment of dry FRP material onto the affected concrete structure using epoxy [4], [7]. Epoxy is typically a combination of part A (resin) and part B (hardener) [8]. Both parts are usually mixed in different ratio as suggested by epoxy manufactures.…”

Section: Introductionmentioning

confidence: 99%

Modified Epoxy for Fibre Reinforced Polymer Strengthening of Concrete Structures

Abdullah¹,

Rosli²,

Ali³

et al. 2020

IJIE

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Fibre-Reinforced Polymer (FRP) is a preferable material for repairing concrete structure due to excellent material properties and effective installation cost over the long-term maintenance of structures. The successful application of FRP strengthening system very much depends on the bond between the concrete substrate and the FRP material using epoxy adhesive. Epoxy acts as a bridge to transfer stress from the concrete to the FRP material. The use of wet lay-up technique to apply FRP onto concrete structure requires epoxy to undergo a curing process normally referred to as cold curing. This paper intends to give a review of the problems with cold-cured epoxy and its effect on structural performance. Cured epoxy is characterised as brittle; therefore, modifications of epoxy are required to toughen the epoxy to suit the purpose of repairing a concrete structure. The methodological approaches from previous studies on modified epoxy were collected and reviewed in this paper. This review also offers some important insights regarding the use of sustainable materials, as well as recommendations for new epoxy in the future.

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Properties and applications of FRP in strengthening RC structures: A review

Cited by 233 publications

References 195 publications

Study on Tensile Properties of CFRP Plates under Elevated Temperature Exposure

Study on Tensile Properties of CFRP Plates under Elevated Temperature Exposure

Displacement measurement of a concrete bridge under traffic loads with fibre-reinforced polymer-packaged optical fibre sensors

Modified Epoxy for Fibre Reinforced Polymer Strengthening of Concrete Structures

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