Structural performance of corroded RC beams repaired with CFRP sheets

Al-Saidy, Abdullah; Al-Harthy, Ali; Al‐Jabri, Khalifa; Abdul-Halim, M.; Al-Shidi, N.M.

doi:10.1016/j.compstruct.2010.01.001

Cited by 103 publications

(49 citation statements)

References 7 publications

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“…The wraps were used to act as anchorages for the longitudinal FRP plate and to preclude any premature shear failure caused by an increase in the beam flexural capacity after strengthening. This strengthening scheme is similar to that used by others (Al-Saidy et al, 2010;Badawi and Soudki, 2005;El Maaddawy and Soudki, 2005;Gadve et al, 2009;Soudki and Sherwood, 2000).…”

Section: Experimental Programmementioning

confidence: 80%

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Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Malumbela

Moyo

Alexander

2011

Magazine of Concrete Research

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This paper presents the results of an experimental study conducted to investigate the performance of corroded, patched and fibre reinforced polymer (FRP) repaired reinforced concrete (RC) beams. The overall programme tested 20 quasi-full-scale (153325433000 mm) RC beams of which 17 were corroded under various levels of sustained loads.After corrosion, eight beams were patch-repaired whilst four were FRP-repaired. Two of the patch-repaired beams were later further repaired with FRPs. The test results showed that 1% mass loss of steel reduced the load-bearing capacity of RC beams by 0 . 8%. Patch repairs were found to slightly increase (by 2 . 5%) the load-bearing capacity of corroded beams, but to significantly increase their stiffness. The load-bearing capacity of FRP-repaired beams was about 50% larger than the capacity of an uncorroded beam and was insensitive to levels of steel corrosion and to patch repairs. There was, however, a significant increase in stiffness of the patch-and then the FRP-repaired beams.It is, therefore, recommended that repair of corroded RC structures should entail patching followed by FRP repairs.

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Section: Experimental Programmementioning

confidence: 80%

“…Fibre reinforced polymers (FRPs) bonded to the external faces of corroded RC structures are often used to increase their loadbearing capacities (Al-Saidy et al, 2010;El Maaddawy and Soudki, 2005;Gadve et al, 2009). El Maaddawy and reported that strengthening an uncorroded RC beam with FRPs increased its load-bearing capacity by 50%.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Malumbela

Moyo

Alexander

2011

Magazine of Concrete Research

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“…Therefore, various methods for accelerating reinforcement corrosion in a concrete structure have been used by several researchers [39]. In many studies the impressed current technique has been used to study the mechanical behaviour of corroded concrete structures [40], bond behaviour of corroded rebars [41], structural behaviour of corroded structural concrete elements [42,43], and the performance of concrete structures [44]. The advantages of using this technique are that a high degree of corrosion can be obtained within a short period of time and the easy control of the desired degree of corrosion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of Rebar Corrosion in Concrete Slab Using Ground Penetrating Radar (GPR)

Zaki

Johari

Hussin

et al. 2018

International Journal of Corrosion

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Corrosion of steel reinforcement is a major cause of structural damage that requires repair or replacement. Early detection of steel corrosion can limit the extent of necessary repairs or replacements and costs associated with the rehabilitation works. The ground penetrating radar (GPR) method has been found to be a useful method for evaluating reinforcement corrosion in existing concrete structures. In this paper, GPR was utilized to assess corrosion of steel reinforcement in a concrete slab. A technique for accelerating reinforcement bar corrosion using direct current (DC) power supply with 5% sodium chloride (NaCl) solution was used to induce corrosion to embedded reinforcement bars (rebars) in this concrete slab. A 2 GHz GPR was used to assess the corrosion of the rebars. The analysis of the results of the GPR data obtained shows that corrosion of the rebars could be effectively localized and assessed.

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“…Corrosive environments are commonly encountered in marine structures, wherein splash (tidal) zones are frequently subjected to repeated wetting and drying by seawater. Corrosion of steel reinforcement occurs due to the lack of contact between the reinforcement and the surrounding concrete [1,2] . Chlorideinduced corrosion is a major issue in marine concrete structures.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of Carbon Fiber Reinforced Polymer (Cfrp) Strengthened Beams Under a Marine Environment

Fazli

Yassin

Shafiq

et al. 2017

GEOMATE

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Marine concrete structures are subjected to a harsh environment and potential climate change variables. Deterioration of the structure demands drastic measures for repair and rehabilitation. Advanced composite materials exhibit unique advantages compared to conventional construction materials. Over the years, carbon fiber reinforced polymer (CFRP) composite material has been used widely for the repair and rehabilitation of structures. Many studies have been conducted on the performance of FRP flexural strengthened reinforced concrete (RC) members. Still, experimental studies investigating the performance of shear strengthening under real environmental conditions are lacking. This paper helps fill this gap because it is an experimental investigation of the behavior of CFRP shear strengthened RC beams under a marine environment. Specimens were exposed to cyclic (wet/dry) and full exposure to the elements for a 3-month period. Six strengthened beams and one unstrengthened beam were tested; the tested control beam failed due to a diagonal-tension crack. The increase in the concrete shear capacity of the strengthened specimens was in the range of 14-18% compared to the control beam. Thus, the results lead to the conclusion that CFRP strengthening increases the shear capacity of specimens considerably.

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Structural performance of corroded RC beams repaired with CFRP sheets

Cited by 103 publications

References 7 publications

Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Experimental Assessment of Rebar Corrosion in Concrete Slab Using Ground Penetrating Radar (GPR)

The Behavior of Carbon Fiber Reinforced Polymer (Cfrp) Strengthened Beams Under a Marine Environment

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