Experimental investigations on the effects of the steel rebar corrosion at structural level

Imperatore, Stefania; Rinaldi, Zila; Spagnuolo, Simone

doi:10.1002/suco.201900246

Cited by 14 publications

(11 citation statements)

References 57 publications

(65 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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“…The relatively thin concrete covers, that additionally were not specifically controlled in the construction stages, leading to their poor quality caused the rapid corrosion of reinforcement and spalling of larger concrete cover areas, after which the process continuously progressed [25]. A lot of existing studies have been conducted in the area of corrosion's influence on the reduction of the bearing capacity of the structural elements [32][33][34][35][36][37][38][39]. It is worth mentioning that the older bridges were designed according to the former/existing regulations for the design of bridges [31,40], while the Eurocodes provisions in bridge design are relatively recent [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Damage Assessment of Road Bridges Caused by Extreme Streamflow in Montenegro: Reconstruction and Structural Upgrading

2022

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The extreme river streamflow that occurred during floods in 2010 in Montenegro caused significant damage to infrastructure and road facilities. The most severe damages were located on bridges crossing the river Lim, where a rapid water level increase in several municipalities led to failure or damage of almost 20 bridges. In this paper, a damage assessment of four significantly damaged reinforced concrete (RC) bridges, located in the affected zone of 40 km, is conducted. One bridge in Berane (bridge 1) and three bridges located on roads upstream from Berane (bridges 2, 3, and 4) were analyzed. Extreme water levels and inadequate flow profiles caused great damage to the bridges of which the piers were not adequately founded. A scouring process under the foundation of piers and abutments located in the riverbed occurred due to surface erosion and degradation of alluvial sediments. Applied methods and techniques for reconstruction and structural strengthening of bridges are presented in detail as well as results of conducted analyses of the design reconstruction process. In order to design appropriate structural strengthening, nonlinear analyses of bridges due to the settlement of the piers were performed. The research findings can be used in the vulnerability assessment and reconstruction planning phases for other bridges in the considered zone.

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“…The primary effects of corrosion on RC elements are cross-section loss of steel reinforcement, decayed mechanical properties of reinforcement, reduction in bond strength between reinforcement and concrete, and reduction in concrete compressive strength due to the cracking [1][2][3][4][5]. These mechanical damages result in the reduced structural capacity of RC elements and subsequently of the whole structure, as highlighted by several experimental and numerical studies carried out in the past few decades [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams

Kioumarsi

Benenato

Ferracuti

et al. 2021

Metals

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Infrastructures and industrial buildings are commonly exposed to aggressive environments and damaged by corrosion. In prestressed reinforced concrete structures, the potential risks of corrosion could be severe since reinforcements are already subjected to high amounts of stress and, consequently, their load-bearing capacity could abruptly decrease. In recent years, some experimental studies have been conducted to explore the flexural behavior of corroded pretensioned reinforced concrete (PRC) beams, investigating several aspects of residual structural performance. Although many studies have been done in this area, there is no concise paper reviewing the state-of-the-art research. Accordingly, the main objective of this paper is to provide a review of the available experimental tests for residual capacity assessment of corroded PRC beams. Based on the state-of-the-art review, a degradation law for the flexural strength of corroded PRC beams is suggested.

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Experimental investigations on the effects of the steel rebar corrosion at structural level

Cited by 14 publications

References 57 publications

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

Damage Assessment of Road Bridges Caused by Extreme Streamflow in Montenegro: Reconstruction and Structural Upgrading

Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams

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