Flexural strengthening of reinforced lightweight polystyrene aggregate concrete beams with near-surface mounted GFRP bars

Tang, Waiching; Balendran, R.V.; Nadeem, Abid; Leung, Hau Yan

doi:10.1016/j.buildenv.2005.05.029

Cited by 65 publications

(35 citation statements)

References 11 publications

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“…Debonding failure of NSM FRP is interfacial debonding at the FRP-epoxy interface [12]. The failure of NSM FRP structural elements may occur due to splitting of the epoxy cover, cracking of the concrete surrounding the groove and pullout of the FRP bars or combined failure [13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of RC beams strengthened by NSM GFRP Bars having different end conditions

Reda

Sharaky

Ghanem

et al. 2016

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Flexural behavior of RC beams strengthened by NSM GFRP Bars having different end conditions

Reda

Sharaky

Ghanem

et al. 2016

Composite Structures

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“…It was concluded that amongst the all CFRP strengthening techniques, the NSM with laminates at 45° was the most effective, not only in terms of increasing beam shear resistance but also in assuring larger deformation capacity at beam failure. Tang et al (2006) used NSM strengthening technique to increase the flexural load carrying capacity of lightweight RC beams. After an experimental study, it was observed that beams strengthened with NSM glass fibre reinforced polymer (GFRP) bars showed a significant increase in ultimate moment ranging from 23% to 53% over the corresponding beams without NSM GFRP bars.…”

Section: Introductionmentioning

confidence: 99%

Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars

Singh

Sivasubramanian

Reddy

et al. 2012

IJSMSS

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In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre using locally developed twisting equipment to strengthen the RC beams. Also, new anchor system was locally developed to predict the tensile characteristics of CFRP bars using universal testing machine. To examine the flexural and shear behaviour, all beams were tested under two-point loading system. It was observed that the NSM strengthened RC beams have higher load carrying capacity than the corresponding control beam in flexure and shear by 68% and 35.6%, respectively. Typical failure modes of the beams during the experimental investigation were CFRP rupture, CFRP debonding, crushing of concrete and shear failure. Finally, a design example has been presented for better understanding in the analysis and design of NSM FRP strengthened RC beams. Further, the values obtained from the analytical study are in good agreement with the experimental values.Keywords: beam; composite; design example; flexure; NSM-FRP; performance; strengthening; shear; sustainable materials.Reference to this paper should be made as follows: Singh, S.B., Sivasubramanian, M.V.R., Likhith Reddy, A., Chandra Prakash, K., Nagarjuna, K. and Hima Kiran, A. (2012) 'Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars', Int.

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“…The beams were painted white to make cracks easier to detect. cracks observed in SPS concretes were less wide and finer than in control concrete [13]. The slope of the load-deflection curves decreased after the first crack has occurred and the relationship was still approximately linear until the steel started yielding.…”

Section: Flexural Behaviourmentioning

confidence: 82%

“…Researchers [13] investigated the characterisations of structural behaviour of reinforced lightweight aggregate concrete beams made with polystyrene aggregate strengthened with near surface mounted (NSM) glass fibre reinforced polymer (GFRP) bars. The parameters examined in their investigation were type of concretes (Control and polystyrene concretes), type of reinforcing bars (GFRP and steel), and type of adhesives.…”

Section: Previous Workmentioning

confidence: 99%

Structural behaviour of reinforced concrete beams containing a novel lightweight aggregate

Herki

Khatib

2016

IJSTRUCTE

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This paper reports the results of an experimental investigation into the structural behaviour of reinforced concrete beams incorporating a novel EPS-based Lightweight Aggregate (LWA) called Stabilised Polystyrene (SPS) aggregate. Four concrete mixtures with Water to Cement ratio (W/C) of 0.8 were used. The replacement levels of natural aggregate by SPS were 0, 30, 60 and 100%. The volume ratio to manufacture SPS aggregate was 8:1:1 (80% waste EPS: 10% cement: 10% clay). A total of 24 beams were cast and tested at 28-day age. Three types of tension reinforcement were used: 2 bars, 3 bars and 2 bars + shear links. There were no compression bars at the top for all beams. Four pointloading flexural tests were conducted up to failure. In general, it can be observed that the structural behaviour of SPS concrete beams is similar to that of other types of lightweight aggregate concretes used around the world.

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Flexural strengthening of reinforced lightweight polystyrene aggregate concrete beams with near-surface mounted GFRP bars

Cited by 65 publications

References 11 publications

Flexural behavior of RC beams strengthened by NSM GFRP Bars having different end conditions

Flexural behavior of RC beams strengthened by NSM GFRP Bars having different end conditions

Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars

Structural behaviour of reinforced concrete beams containing a novel lightweight aggregate

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