A State-of-the-Art Review of Bending and Shear Behaviors of Corrosion-Damaged Reinforced Concrete Beams

El-Sayed, Ahmed K.; Al‐Negheimish, Abdulaziz I.; Alhozaimy, Abdulrahman M.

doi:10.14359/51706919

Cited by 23 publications

(20 citation statements)

References 61 publications

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“…In order to rehabilitate efficiently the damaged RC structures due to corrosion, the residual strength and failure mechanism of these structures must be determined. The majority of the previous studies have investigated mainly on the flexural behavior of corroded RC structures [2][3][4], but the effect of reinforcement corrosion on shear performance has not been given much attention. Recently, researchers have gradually focused on the shear strength of corroded beams [5][6][7], because the corrosion of reinforcement had altered the failure mode from bending for non-corroded beams to shear for corroded beams [8].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the shear capacity of corroded reinforced concrete beams without shear reinforcement

Tan

Kiên

2021

STCE

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The effect of corrosion on the structural behavior of reinforced concrete (RC) beams without stirrups was experimentally investigated. A total of eight medium-scale RC beams were constructed without stirrups. The beams were 150 mm in width, 200 mm in depth, and 1100 mm in length. Test variables included three distinct degrees of corrosion (0%, 3.13%, 4.11%, and 4.93% by mass loss of steel rebar). Six beams were subjected to an accelerated corrosion test, while two beams served as non-corroded control beams. All beams were tested under four-point loading failure after the corrosion stage. The effect of various small degrees of corroded longitudinal reinforcements has been observed for the shear capacity. Test findings found that all tested beams had a brittle failure with tested corrosion degrees. Moreover, corroded beams that are exposed to 3% and 4% average corrosion degree reported having a larger shear capacity of approximately 7% compared to control beams. Lastly, beams with a corrosion degree of about 5% showed a decrease of 10% shear strength and a different failure mechanism with distinguished cracking patterns due to the formation of corrosion cracks along the longitudinal reinforcements. Keywords: reinforced concrete beam; reinforcement corrosion; shear strength; no stirrups.

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Section: Introductionmentioning

confidence: 99%

An experimental study on the shear capacity of corroded reinforced concrete beams without shear reinforcement

Tan

Kiên

2021

STCE

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“…Surveys outcomes revealed that many RC and PC existing structures are reaching—or already reached—the end of their service life and they show evidences of corrosion and deterioration. Research carried out in the United State by the American Society of Civil Engineers (ASCE) and the Federal Highway Administration (FHWA) report that the 9% of the USA bridges were classified as “structural deficient” and that the 30% of existing bridges have already exceeded their service life 3 . Moreover, environmental degradation can be considered the cause of more than the 7% of bridge collapses occurred from 1980 to 2012 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Experimental tests on corroded RC beams are available in literature. Soltani et al 3 pointed out that 112 specimens were tested from 1955 to 2017 to investigate the shear capacity of RC members with corroded reinforcement. However, most of the research deals with beams with transverse reinforcement.…”

Section: Introductionmentioning

confidence: 99%

“…Research carried out in the United State by the American Society of Civil Engineers (ASCE) and the Federal Highway Administration (FHWA) report that the 9% of the USA bridges were classified as "structural deficient" and that the 30% of existing bridges have already exceeded their service life. 3 Moreover, environmental degradation can be considered the cause of more than the 7% of bridge collapses occurred from 1980 to 2012. 2 Therefore, in order to plan maintenance, repairing or dismantlement actions is fundamental to properly evaluate the effects of corrosion-induced mechanisms on RC and PC structures and infrastructures.…”

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Experimental tests on shear capacity of naturally corroded prestressed beams

Belletti

Rodrı́guez

Andrade

et al. 2020

Structural Concrete

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An experimental campaign was carried out on full-scale naturally corroded prestressed concrete (PC) beams without transverse reinforcement to investigate the corrosion effects on failure modes, shear capacity, and ductility. The analyzed PC beams, structural members of a thermal power plant, were subjected for 10 years to refrigerating wetting cycles with marine water. In this paper, the experimental results of four-point bending tests, carried out at the Institute "Eduardo Torroja" in Madrid, are described. Before tests, a visual inspection was conducted to detect the damages induced by corrosion. During the tests, displacements and strains were measured by using linear variable displacement transducer (LVDT) and digital image correlation (DIC). After the tests, strands were removed from beams and cut in pieces, which were weighed to measure the mass loss. Last, it was proved that the residual life of PC beams, exposed to chloride attack, is strongly affected by corrosion, whose effects reduce the shear capacity in terms of both resistance and ductility. K E Y W O R D S digital image correlation, natural corrosion, prestressed concrete beams, shear capacity 1 | INTRODUCTION In the last years, corrosion has been considered as one of the main factors that causes detrimental effects on durability and resistance of reinforced concrete (RC) and prestressed concrete (PC) structures and infrastructures. After the recent bridge collapses occurred worldwide, such as the Ynys-y-gwas Bridge in 1985 in

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“…However, due to the characteristics of the PHCS, which has a large void ratio, the web is very thin, and the prestress is not fully effective in the transfer length region which results in a lack of web-shear strength at the member ends subjected to high shear forces [9][10][11][12][13][14]. Hawkins and Ghosh (2006) [13] reported that the thicker the depth of the PHCS, the lower the web-shear strength, and thus an additional strength reduction factor should be applied to ensure adequate safety for PHCS with a thickness greater than 315 mm.…”

Section: Introductionmentioning

confidence: 99%

Shear Tests of Deep Hollow Core Slabs Strengthened by Core-Filling

et al. 2020

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Prestressed hollow core slabs (PHCSs) have commonly been applied to long-span structures, due to their excellent flexural capacity and deflection control performance. However, in quite a few cases, the web-shear strength at member ends subjected to high shear forces is insufficient, because the web of the PHCS is very thin, making it difficult to place shear reinforcement, and the prestress is not fully effective in transfer length regions. Accordingly, a variety of shear strengthening methods have been proposed to improve the web-shear strength of PHCS ends. In this study, experimental research was conducted to investigate the shear resistance mechanism of PHCS strengthened by core-filling method, which has been most widely used in the construction field. The number of filled cores and the shear reinforcement ratio were set as the main test variables, and the patterns and angles of shear cracks that occurred in the PHCS units and filled cores, respectively, and the strain behavior of the shear reinforcement, were measured and analyzed in detail. This study also analyzed the test results based on the current design codes, and proposed a modified shear strength equation that can be applied to the core-filled PHCS.

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A State-of-the-Art Review of Bending and Shear Behaviors of Corrosion-Damaged Reinforced Concrete Beams

Cited by 23 publications

References 61 publications

An experimental study on the shear capacity of corroded reinforced concrete beams without shear reinforcement

An experimental study on the shear capacity of corroded reinforced concrete beams without shear reinforcement

Experimental tests on shear capacity of naturally corroded prestressed beams

Shear Tests of Deep Hollow Core Slabs Strengthened by Core-Filling

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