Flexural strengthening of RC continuous beams using CFRP laminates

Ashour, Ashraf; El-Refaie, S. A.; Garrity, S. W.

doi:10.1016/j.cemconcomp.2003.07.002

Cited by 156 publications

(85 citation statements)

References 9 publications

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“…These conditions make most empirical equations (developed for simply supported beams) useless for continuous beams. However, very little research has been published in connection with the behaviour of such continuous beams with external reinforcement (Ashour et al, 2004;Bukhari et al, 2010). In addition, most design guidelines (ACI, 1996; Concrete Society, 2000) were developed for simply supported beams with external FRP laminates.…”

Section: Introductionmentioning

confidence: 99%

Shear strengthening of reinforced concrete continuous beams

Ahmad¹,

Elahi²,

Barbhuiya³

et al. 2013

Proceedings of the Institution of Civil Engineers - Structures

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This paper presents the results of an experimental investigation to evaluate the contribution of carbon-fibrereinforced polymer sheets in enhancing the shear strength of continuous reinforced concrete beams. A total of five, two-span concrete continuous beams with rectangular cross-section were tested. One beam without strengthening was used as the control and the other four beams were strengthened with different arrangements of polymer sheets.The variables selected were various wrapping schemes and anchorage length of the polymer sheet. The aim was to develop a better understanding of the shear contribution of polymer and to investigate the potential for cost savings by minimising the area of externally bonded polymer sheets. Test results were compared with four existing shear prediction models available in the literature. The results indicate that the polymer sheet significantly enhanced the shear strength of the beams, and that the area of polymer sheet can be minimised with marginal compromise on the shear carrying capacity of strengthened concrete beams.

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Section: Introductionmentioning

confidence: 99%

Shear strengthening of reinforced concrete continuous beams

Ahmad¹,

Elahi²,

Barbhuiya³

et al. 2013

Proceedings of the Institution of Civil Engineers - Structures

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“…As can be seen from Table 2 and experimental results of Ashour et al 2004, El-Refaie et al 2003, strengthening both the hogging and sagging regions with CFRP laminate cause to increase significantly load capacity, but ductility of continuous beam is significantly decreased. Also using the GFRP for strengthening the beam (SG3) led to slightly increase the ductility.…”

Section: Ductilitymentioning

confidence: 86%

“…Moment redistribution permits the utilization of the full capacity of more segments of the beam. Akbarzadeh and Maghsoudi (2009a, b), Ashour et al (2004) and El-Refaie et al (2003) found out that strengthening both the top surface at the negative moment and the beam soffit at positive moment region to be the most effective arrangement of the CFRP and GFRP laminates to enhance the load capacity, but ductility and moment redistribution are very low.…”

Section: Introductionmentioning

confidence: 99%

Flexural Strengthening of RC Continuous Beams Using Hybrid FRP Sheets

Akbarzadeh

Maghsoudi

2011

Advances in FRP Composites in Civil Engineering

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Due to linear stress-strain characteristics of FRP up to failure, the ductility of plated members and their ability to redistribute moment is less than that of unplated RC beams. Hybrid FRP laminates, which consist of a combination of either carbon and glass fibers, changes the behavior of the material to a non-linear behavior. Although many in situ RC beams are of continuous construction, there has been very little research into the behavior of such beams with external reinforcement. This paper presents an experimental program conducted to study the behaviour of RC two-span beams strengthened with hybrid carbon and glass reinforced polymer sheets (HCG). The program consists of a total of six continuous beams with overall dimensions equal to 250×150×6000 mm. The test results showed that using the HCG for strengthening the continuous RC beams lead to significantly increase of bearing capacity, ductility and moment redistribution ratio compared to strengthened beams with CFRP or GFRP.

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“…Fiber reinforced polymer (FRP) laminates are widely popular in building construction for the strengthening of structural members (Kachlakev and Alsayed et al 2010;AlSalloum et al 2011;Elsanadedy et al 2012a, b;Alsayed et al 2014;Elsanadedy et al 2015Elsanadedy et al , 2016Shehab et al 2017). The influence of FRP laminates on the response of solid RC beams under flexure (Alagusundaramoorthy et al 2003;Ashour et al 2004;Hawileh et al 2013) and shear (Li et al 2001;Zhang et al 2004;Islam et al 2005) has been widely studied. However, the research on the use of FRP laminates in the strengthening of RC beams with opening is limited Abdalla et al 2003;El Maaddawy and Sherif 2009;Pimanmas 2010;Chin et al 2011;Hawileh et al 2012;Nie et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Behavior of FRP-Strengthened RC Beams with Large Rectangular Web Openings in Flexure Zones: Experimental and Numerical Study

Almusallam

Al-Salloum

Elsanadedy

et al. 2018

Int J Concr Struct Mater

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This paper aims to investigate the behavior of fiber reinforced polymer (FRP) strengthened reinforced concrete (RC) beams containing large rectangular web openings in the flexure zone. Studied parameters were type of loading, opening size and strengthening scheme. Seven RC beams categorized into two different groups were tested. In the first group, two unstrengthened beams (one solid without opening and one with large rectangular web opening in the pure flexure zone) were tested under four-point bending. In the second group, five beams were tested under center-point loading. They comprised of one reference solid beam and four beams with large rectangular web opening in the maximum-moment region. Out of the four beams with openings, two specimens were unstrengthened and the other two were strengthened with two different FRP schemes. A numerical study was also conducted and the results of analysis were validated with experiments. The calibrated analysis was then used for some useful parametric studies in which the effect of different parameters was investigated.

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Flexural strengthening of RC continuous beams using CFRP laminates

Cited by 156 publications

References 9 publications

Shear strengthening of reinforced concrete continuous beams

Shear strengthening of reinforced concrete continuous beams

Flexural Strengthening of RC Continuous Beams Using Hybrid FRP Sheets

Behavior of FRP-Strengthened RC Beams with Large Rectangular Web Openings in Flexure Zones: Experimental and Numerical Study

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