Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams

Kioumarsi, Mahdi; Benenato, Armando; Ferracuti, Barbara; Imperatore, Stefania

doi:10.3390/met11030442

Cited by 32 publications

(17 citation statements)

References 50 publications

(141 reference statements)

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“…Post-1980 scientific reports and technical documents [26][27][28] give a great emphasis to the reduced service life of RC structures in relation to bar corrosion and carbonation. In several papers, carbonation is regarded among the primary detrimental factors responsible for the corrosion of bars and the reduction of the service life of concrete structures [29][30][31][32], while many others investigated the reduction of the strength capacity of RC structures due to corrosion (see, e.g., [33][34][35][36]).…”

Section: Some Divergencies Between Past and Present On Rc Durabilitymentioning

confidence: 99%

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

et al. 2021

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In the past century, precast reinforced concrete has become the most widely used construction material in infrastructure engineering, especially for long-span structures. Nowadays, a growing research area concerns the assessment of concrete strength degradation due to environmental exposure and reinforcement corrosion. This paper reports an experimental campaign on some prefabricated concrete elements that were exposed to atmospheric agents for approximately 20 years. The campaign took the uncommon opportunity to access the full inspection and sampling of rebar. The included activities had different invasiveness and encompassed inspections, core sampling, corrosion potential mapping, compressive strength tests, as well as neutralization depth assays on cored surfaces, on chisel-split surfaces, and on drilling powders. The results bring together a global diagnostic picture of very limited degradation and of elements that are fully able to attend their design service life; the latter is estimated to be considerably higher than 20 years and to exceed 75 years if the concrete mix does not show quality issues. Results also permit drawing considerations on a hierarchy of diagnostic reliability in the evaluation of RC degradation, in which concrete core sampling plays the role of golden standard.

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Section: Some Divergencies Between Past and Present On Rc Durabilitymentioning

confidence: 99%

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

et al. 2021

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“…Five research papers have been published in Special Issue of Metals titled Corrosion Effects on the Durability of RC Structures. The collected articles deal with several aspects of the corrosion phenomenon in reinforced concrete, including the copper corrosion behavior in simulated concrete-pore solutions [1], the influence of microstructure on the corrosion resistance of steel bars and their fatigue behavior [2], the degradation of bond mechanism between steel and concrete [3,4], and the flexural capacity of corroded Prestressed Reinforced Concrete (PRC) beams [5].…”

Section: Contributionsmentioning

confidence: 99%

“…Especially in the case of prestressed reinforced concrete (PRC) structures, the potential corrosion risks could be severe since steel reinforcements are already subjected to high amounts of stress and, consequently, their load-bearing capacity could abruptly decrease. M. Kioumarsi et al [5] presented an extensive review of the available experimental research on the load-bearing capacity of corroded PRC beams. The outcomes demonstrate that corrosion in PRC beams results in pitting corrosion in the strands, developing stress concentration around the pits, which induces the premature failure of prestressing wires.…”

Section: Contributionsmentioning

confidence: 99%

Corrosion Effects on Durability of RC Structures

Apostolopoulos¹,

Koulouris²

2021

Metals

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“…Additionally, such parameters as the concrete type, the effect of aging and their impact on the diffusion coefficient are analyzed. Interesting is the work [ 9 ], where on the basis of the profound theoretical research degradation, the law for the flexural strength of corroded PRC beams is suggested.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Corrosion Fatigue Damages of Rebars under Loading in Time

2021

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Nowadays, a relatively small number of studies concern the study of corrosion processes in reinforced concrete structures under load. Additionally, rather little research has been carried out concerning changes in the stress–strain state parameters of structures under the simultaneous action of aggressive environment and load. This issue requires additional experimental and theoretical investigation. Determination of mechanical properties, fatigue characteristics and susceptibility to corrosion cracking was performed on samples of reinforcing St3GPF steel. The chemical composition of steel was determined by structural analysis. The spectral method for the determination of alloying elements and impurities in steels is based on the excitation of iron atoms and admixtures by electric discharge, decomposition of radiation into a spectrum, followed by its registration on photoplate with the use of electrograph. Experimental tests of samples in an aggressive environment under the action of statically applied tensile force showed that corrosion damage has little effect on the strength characteristics. At the same time, the decrease in area reduction and the decrease in strain were recorded. Additionally, the action of cyclic loads in an aggressive environment leads to a significant reduction in the fatigue limit to values from 20 to 24% of the yield strength of the original samples, which is 2–3 times lower than the fatigue limit of undamaged samples.

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Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams

Cited by 32 publications

References 50 publications

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

Corrosion Effects on Durability of RC Structures

Corrosion Fatigue Damages of Rebars under Loading in Time

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