Analysis of deflections of bridge girders strengthened by carbon fibre reinforcement

Skuturna, Tomas; Valivonis, Juozas; Vainiūnas, Povilas; Marčiukaitis, Gediminas; Daugevičius, Mykolas

doi:10.3846/1822-427x.2008.3.145-151

Cited by 21 publications

(12 citation statements)

References 19 publications

(15 reference statements)

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“…Experimental researches (Marčiukaitis et al 2007;Skuturna et al 2008;Daugevičius et al 2012;Skuturna, Valivonis 2014, 2015 show that flexural stiffness increases due to the increased depth of the neutral axis. However, thin CFRP plates do not change the crosssection of the strengthened element.…”

Section: Introductionmentioning

confidence: 99%

Rc Beams Strengthened With Hpfrcc: Experimental and Numerical Results

Daugevičius

Valivonis

Skuturna

et al. 2016

Journal of Civil Engineering and Management

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Abstract. The study analyses the behaviour of reinforced concrete beams strengthened with high-performance fibrereinforced cementitious composite (HPFRCC). Six beams were divided into two equal groups and strengthened. In total, nine beams were tested, including three control beams that were not strengthened. Control beams were over-reinforced. The beams of the first group were strengthened in the compressed part while those of the second group were strengthened in the compressed and tensioned parts of the section. The experimental results of all tested beams were compared with numerical results. The positive and negative effects of strengthening the resistance and serviceability of the beams were experimentally determined. The obtained results showed that the load-carrying capacity of all strengthened beams increased and their deflections decreased; however, crack width in the beams of the second group increased while that of the beams of the first group decreased. The width of cracks increased because the number of cracks decreased. The findings of this study show a comparison of strains, deflections, cracking and load-carrying capacity and indicate that strengthening changed the failure of the beams.

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Section: Introductionmentioning

confidence: 99%

Rc Beams Strengthened With Hpfrcc: Experimental and Numerical Results

Daugevičius

Valivonis

Skuturna

et al. 2016

Journal of Civil Engineering and Management

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“…One of the most advantageous material types for strengthening is fibre-reinforced polymers (FRP) due to their corrosion resistance and high strength to low weight ratio [1][2][3][4][5]. Anticorrosion properties are particularly relevant in aggressive environments, for example, bridge structures [6]. Strength properties could be used even more efficiently and economically by prestressing the FRP material [7,8].…”

Section: Introductionmentioning

confidence: 99%

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

Šlaitas

Daugevičius

Valivonis

et al. 2018

International Journal of Polymer Science

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The present study focuses on a prediction of crack width and load-carrying capacity of flexural reinforced concrete (RC) elements strengthened with fibre-reinforced polymer (FRP) reinforcements. Most studies on cracking phenomena of FRP-strengthened RC structures are directed to empirical corrections of crack-spacing formula given by design norms. Contrary to the design norms, a crack model presented in this paper is based on fracture mechanics of solids and is applied for direct calculation of flexural crack parameters. At the ultimate stage of crack propagation, the load-carrying capacity of the element is achieved; therefore, it is assumed that the load-carrying capacity can be estimated according to the ultimate crack depth (directly measuring concrete's compressive zone height). An experimental program is presented to verify the accuracy of the proposed model, taking into account anchorage and initial strain effects. The proposed analytical crack model can be used for more precise predictions of flexural crack propagation and load-carrying capacity.

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“…In general, the applications where accessibility conditions allow wrapping a member with FRP composites, such as FRP wrapping of RC columns, has no problem regarding a debonding issue (Buyukozturk et al 2004). Considering the use of FRPs for external strengthening of the external reinforcement of other types of concrete elements, Xiong et al (2007), Kim et al (2008a, b), Skuturna et al (2008), Diab et al (2009), and Daugevičius et al (2012) found that additional anchoring was essential in order to assure FRP-to-concrete bond strength.…”

Section: Frp Materials Properties and Types Of Manufacturingmentioning

confidence: 99%

FRP Reinforcement for Concrete Structures: State-of-the-Art Review of Application and Design

Gudonis

Timinskas

Gribniak

et al. 2014

Engineering Structures and Technologies

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Fiber reinforced polymers (FRPs) are considered to be a promising alternative to steel reinforcement, especially in concrete structures subjected to an aggressive environment or to the effects of electromagnetic fields. Although attempts to develop effective reinforcement have been followed, the application of FRPs remains limited by the solution to simple structural problems that mainly appear due to the absence of design codes, significant variation in the material properties of FRP composites and limited knowledge gained by engineers as regards the application aspects of FRP composites and structural mechanics of concrete elements reinforced with FRPs. To fill the latter gap, the current state-of-the-art report is dedicated to present recent achievements in FRPs applying practice to a broad engineers’ community. The report also revises the manufacturing process, material properties, the application area and design peculiarities of concrete elements reinforced with FRP composites. Along the focus on internal reinforcement, the paper overviews recent practices of applying FRP reinforced concrete (RC) elements in structural engineering. The review highlights the main problems restricting the application of FRPs in building industry and reveals the problematic issues (related to the material properties of the FRP) important for designing RC following the formulation of targets for further research.

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Analysis of deflections of bridge girders strengthened by carbon fibre reinforcement

Cited by 21 publications

References 19 publications

Rc Beams Strengthened With Hpfrcc: Experimental and Numerical Results

Rc Beams Strengthened With Hpfrcc: Experimental and Numerical Results

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

FRP Reinforcement for Concrete Structures: State-of-the-Art Review of Application and Design

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