Retrofitting of reinforced concrete beams using composite laminates

Obaidat, Yasmeen Taleb; Heyden, Susanne; Dahlblom, Ola; Abu‐Farsakh, Ghazi; Abdel-Jawad, Yahia

doi:10.1016/j.conbuildmat.2010.06.082

Cited by 100 publications

(72 citation statements)

References 5 publications

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“…The results of the present tested specimens and other test results (Ceroni and Pecce 2005;Esfahani et al 2007;Ceroni 2010;Obaidat et al 2011;Spadea et al 2015) indicate that the beam deflection and thus the curvature increases during debonding failure from D ds to D dc . Detailed explanation is given in Sect.…”

Section: Analytical Model Of Frp Debondingmentioning

confidence: 72%

“…Although the assumption of constant curvature at debonding was also adopted in the theoretical analysis carried out by Bencardino and Condello (2016), experimental data sets produced by other researchers (Ceroni and Pecce 2005;Esfahani et al 2007;Ceroni 2010;Obaidat et al 2011;Spadea et al 2015), and also the tested beams herein show that assuming the constant deflection and curvature during debonding is not valid and can be resulted in significant error in predicting the load of debonding failure. In contrast with assuming the constant deflection during debonding, the above mentioned results indicate that the deflection and curvature of the beam increases by 7-15 %, during debonding failure.…”

Section: Energy Dissipated Due To Rebar Yieldingmentioning

confidence: 99%

See 1 more Smart Citation

An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

Moein

Tasnimi

2016

Int J Concr Struct Mater

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Reinforced concrete (RC) beams strengthened by externally bonded reinforcement often fail by debonding. This paper presents an experimental and analytical study aimed at better understanding and modeling the fiber reinforced polymer (FRP) debonding failures in strengthened RC beams under monotonic and cyclic loads. In order to investigate the flexural behavior and failure modes of FRP-strengthened beams under monotonic and cyclic loadings, an experimental program was carried out. An analytical study based on the energy balance of the system was also performed. It considers the dominant mechanisms of energy dissipation during debonding and predicts the failure load of the strengthened beams. Validation of the model was carried out using test data obtained from the own experimental investigation.

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Section: Analytical Model Of Frp Debondingmentioning

confidence: 72%

Section: Energy Dissipated Due To Rebar Yieldingmentioning

confidence: 99%

An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

Moein

Tasnimi

2016

Int J Concr Struct Mater

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“…The anchorage length required to reach composite failure was unique to the particular specimen geometry used, however, test results showed that an undesirable premature failure occurs if the bonded length of plate is insufficient. Obaidat and others [3] Investigated the behaviour of structurally damaged full-scale reinforced concrete beams retrofitted with CFRP laminates in shear or in flexure with main variables considered were the internal reinforcement ratio, position of retrofitting and the length of CFRP. The results concluded that the shorter the CFRP was the more shear concentration will occur on the ends, yet, only one failure mode was experienced which is fibre debonding.…”

Section: Related Studiesmentioning

confidence: 99%

Unidirectional Carbon Fibre Anchorage Length Effect on Flexural Strength Capacity For Concrete Beams

Omairey¹,

Davies

2016

2nd International Conference on Architecture, Structure and Civil Engineering (ICASCE-16) March 26-27, 2016 London (UK)

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“…The tests have shown that the use of FRP reliable method leads to decrease the propagation of critical diagonal cracks, and also leads to increase the load bearing capacity of the beam. Obaidat et al (2011) studied the retrofitting of reinforced concrete beams using composite laminates. They reported the results of an experimental study regarding the structural behavior of completely damaged RC beams retrofitted with CFRP laminates in the shear or flexural regions.…”

Section: Introductionmentioning

confidence: 99%

The effect of transverse steel rebars on the behavior of concrete beam reinforced with glass polymer rebars

Hosseini¹,

Mehdipour²,

Beiranvand³

2017

10.5267/j.esm

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In the present study, the flexural behavior of concrete beams reinforced with longitudinal rebars made of glass fiber reinforced polymer composites (GFRP), is studied using finite element method. For this purpose, a number of concrete beams with square sections are modeled in ABAQUS. In all of the beams, four GFRP rebars with diameter of 12 mm, and 10 steel rebars with diameter of 8 mm are vertically used to prevent creating shear cracks in the beams. The beam no. 1 is without transverse rebar, beam no. 2 has a row of transverse rebar, which is placed at the bottom and in the plane of vertical rebars. Beam no. 3 has a row of transverse rebars that is placed at the top and in the plane of vertical rebars; and the beam no. 4 has two rows of transverse rebar at the top and bottom of the beam in the plane of vertical rebars. The beams are gradually loaded under up to 6 ton, and the amounts of displacement and strain at the middle of beams are compared together. The obtained results reveal that the forcedisplacement diagram of reinforced beams with composite rebars are almost linear until ultimate phase, and in all of the beams, adding transverse rebar leads to less deflection in the middle of the beam under an identical loading. Moreover, the load bearing capacity of beams containing transverse rebars, were higher than the other beams.

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Retrofitting of reinforced concrete beams using composite laminates

Cited by 100 publications

References 5 publications

An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

Unidirectional Carbon Fibre Anchorage Length Effect on Flexural Strength Capacity For Concrete Beams

The effect of transverse steel rebars on the behavior of concrete beam reinforced with glass polymer rebars

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