Flexural performance of reinforced concrete beams strengthened with prestressed near-surface-mounted FRP reinforcements

Kara, İlker Fatih; Ashour, Ashraf; Köroğlu, Mehmet Alpaslan

doi:10.1016/j.compositesb.2016.01.023

Cited by 35 publications

(9 citation statements)

References 20 publications

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“…Fibre-reinforced polymer (FRP) composites have been widely used as internal and external reinforcements to concrete structures, for example as reinforcement in beams or slabs [21][22][23]. Nowadays, composite FRP piles have been an innovative solution for composite columns.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on compressive behavior and failure analysis of composite concrete confined by glass/epoxy ±55° filament wound pipes

Gemi

Köroğlu

Ashour

2018

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Experimental study on compressive behavior and failure analysis of composite concrete confined by glass/epoxy ±55° filament wound pipes

Gemi

Köroğlu

Ashour

2018

Composite Structures

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“…Similar numerical techniques were used by [31][32][33] for response prediction of reinforced concrete (RC) beams strengthened with prestressed near-surface-mounted FRP reinforcements or hybrid FRP/steel reinforcements. However, in these studies debonding failure was not taken into account.…”

Section: Theoretical Modellingmentioning

confidence: 99%

A Theoretical Model for Debonding Prediction in the RC Beams Externally Strengthened with Steel Strip and Inorganic Matrix

Bencardino

Nisticò

2021

Materials

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This paper shows a theoretical model for predicting the moment–curvature/load–deflection relationships and debonding failure of reinforced concrete (RC) beams externally strengthened with steel reinforced geopolymeric matrix (SRGM) or steel reinforced grout (SRG) systems. Force equilibrium and strain compatibility equations for a beam section divided into several segments are numerically solved using non-linear behaviour of concrete and internal steel bars. The deflection is then obtained from the flexural stiffness at a mid-span section. Considering the appropriate SRGM-concrete bond–slip law, calibrated on single-lap shear bond tests, both end and intermediate debonding failures are analysed. To predict the end debonding, an anchorage strength model is adopted. To predict intermediate debonding, at each pair of flexural cracks a shear stress limitation is placed at concrete–matrix interface and the differential problem is solved at steel strip–matrix interface. Based on the theoretical predictions, the comparisons with experimental data show that the proposed model can accurately predict the structural response of SRGM/SRG strengthened RC beams. It can be a useful tool for evaluating the behaviour of externally strengthened RC beams, avoiding experimental tests.

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“…Atutis et al focused on crack width prediction and shear response analysis of the prestressed concrete (PC) beams [11]. Kara et al estimated the curvature, deflection and moment capacity of the reinforced concrete beams and predicted the moment-curvature relationship [12]. Abdullah et al studied the adhesion of non-prestressed and prestressed carbon fiber reinforced polymer plates to concrete columnto-board joints.…”

Section: State Of the Artmentioning

confidence: 99%

Performance of Concrete Beam Strengthened with Prestressed Sprial Steel Wires

Ding¹,

Zhang²,

Zhang³

2019

JESTR

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In view of the defects and limitations of the existing reinforcement methods, it is necessary to put forward a reinforcement method with better interfacial bond performance, more convenient construction and economical reinforcement. A new reinforcement technique with prestressed spiral steel wires was presented, and one control beam, three strengthened beams under monotonic loading were tested. Under the same initial prestressing level, the amount of reinforcement and different groove sizes, the flexural capacity, load-deflection relationship, crack and deformation of reinforced concrete beams were systematically investigated. Results show that the reinforcement technique can significantly improve the first-crack load, steel-yielding load, ultimate load of the beams, and improve the service performance of the strengthened beams. The high performance of the spiral steel wires is allowed for better utilization. The conclusions obtained in the study are of important reference value to direct the similar engineering practice.

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Flexural performance of reinforced concrete beams strengthened with prestressed near-surface-mounted FRP reinforcements

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Cited by 35 publications

References 20 publications

Experimental study on compressive behavior and failure analysis of composite concrete confined by glass/epoxy ±55° filament wound pipes

Experimental study on compressive behavior and failure analysis of composite concrete confined by glass/epoxy ±55° filament wound pipes

A Theoretical Model for Debonding Prediction in the RC Beams Externally Strengthened with Steel Strip and Inorganic Matrix

Performance of Concrete Beam Strengthened with Prestressed Sprial Steel Wires

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