Variación de las características mecánicas de armaduras de alta ductilidad B500SD en función de su grado de corrosión

Escamilla, Alfonso Cobo; Moreno, E.; Cánovas, Manuel Fernández

doi:10.3989/mc.2011.61410

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…Different approaches have been followed in the current state of the art for the modelling of the structural effects of corrosion of steel reinforcement in RC structures. As it is reflected in many studies and in the present work, the effects of corrosion on the structural behavior are very wide and complex (Fernandez et al 2015; Tahershamsi Page 20 of 23 Fernandez et al Int J Concr Struct Mater (2018) 12:75 et al 2014Berrocal et al 2017;Cairns et al 2005;Cobo et al 2011;Stewart 2009;Law et al 2008;Zhu et al 2013). One of the most relevant structural effects of corrosion of reinforcing steel bars are those derived from the change of the interaction between the concrete and steel, namely bond behavior.…”

Section: Modelling Approaches For the Assessment Of Corroded Rc Strucmentioning

confidence: 69%

Ultimate Capacity of Corroded Statically Indeterminate Reinforced Concrete Members

Fernandez

Herrador

Bernat

et al. 2018

Int J Concr Struct Mater

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The corrosion of steel reinforcement is commonly believed to be the primary cause of structural deterioration of reinforced concrete (RC) structures; as a result of this deterioration, a RC structure can incur a considerable reduction in structural serviceability and safety. Because of their inherent redundancy, statically indeterminate structures develop resistant mechanisms that can potentially assist in delaying the collapse of severely damaged RC structures. In order to experimentally demonstrate these resistant mechanisms, four groups of three two-span continuous RC beam members each were deteriorated using induced corrosion methods and tested to failure under monotonic loads. For control, one group of three RC beams was left uncorroded and similarly load tested. All the RC beam specimens subjected to corrosion demonstrated a significant reduction (a maximum reduction of 55% as compared to the uncorroded control group) of their ultimate capacity. The presence of corrosion induced a transition from flexural failure to anchorage failure in some specimens; despite the induced damage some redistributed structural capacity was observed. Modelling of deterioration effects by the inclusion of different aspects of corrosion was also conducted. Three-dimensional (3D) Finite-Element Method (FEM) models were developed to assess the variation in the mechanical properties of the corroded steel and the reduction in the bond interaction between concrete and steel due to the corrosion of the steel reinforcement. In general, the current 3D FEM models demonstrated a good agreement with the experimental data; however, 3D FEM models that exhibit greater sophistication are necessary to better describe the failure mode of some RC beam specimens when they are associated with local effects.

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Section: Modelling Approaches For the Assessment Of Corroded Rc Strucmentioning

confidence: 69%

Ultimate Capacity of Corroded Statically Indeterminate Reinforced Concrete Members

Fernandez

Herrador

Bernat

et al. 2018

Int J Concr Struct Mater

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“…The effects of corrosion on the mechanical performance of reinforcing steel bars has been studied in the literature; thus, significant effects on strength and ductility have been found [15][16][17][19][20][21][22][23][24][25][26][27][28]. Studies in the field have also presented the influence of the deterioration of steel bars embedded in concrete through corrosion on the reduction of the bond strength between the bar and the concrete [19][20][21][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Lazar,

Cimpoesu,

Istrate

et al. 2024

Coatings

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This paper carries out a study on the microstructural characteristics and mechanical properties of phosphate layers deposited on steel reinforcements for civil constructions. Analyses were performed on 4 sets of samples: 1 control sample (unphosphated) and 2–4 samples that were phosphated with three different solutions. The structural and chemical analysis, as well as the examination of the mechanical properties (surface roughness, microindentation, and scratch resistance) of the phosphate layers deposited on steel rebars for civil constructions, was carried out. The following conclusions were drawn from the experimental results: the coatings show flashes of crystals deposited on the metal surface; chemical homogenization of the phosphated layers is observed; the profiles present a higher roughness after deposition of the phosphated layers; the indentation Young modulus and hardness values recommend the phosphating procedure to improve the CS surface quality; the COF is three times larger for phosphated samples compared with the initial metallic one; and scratch traces are uninterrupted, except for one zone of sample that was phosphated with solution II, wherein the phosphated layer does not present lateral scratches or exfoliations.

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“…unc 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.04 0.06 0.08 0.1 0.12 0.14 0.16 Load-strain curve for different corrosion levels. Fernandez and Berrocal Int J Concr Struct Mater (2019) 13:9used, significantly higher values of α of up to 3.2, cf (Santos and Henriques 2015;Bazán et al 2016;Cobo et al 2011)…”

mentioning

confidence: 98%

Mechanical Properties of 30 Year-Old Naturally Corroded Steel Reinforcing Bars

Fernandez

Berrocal

2019

Int J Concr Struct Mater

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The present paper investigates the mechanical response of more than 120 corroded reinforcing bars extracted from a real bridge after 30 years in service. Corrosion was quantified using gravimetric and 3D-laser scanning measurements. An expression to relate the average and critical corrosion levels was found, the latter being the main parameter governing the capacity of corroded bars. Whereas the strength of the material was not affected by corrosion, the ultimate strain decreased sharply. However, strains were not only affected by cross-sectional reduction but also by the shape of the critical pit and necking at failure.

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Variación de las características mecánicas de armaduras de alta ductilidad B500SD en función de su grado de corrosión

Cited by 11 publications

References 14 publications

Ultimate Capacity of Corroded Statically Indeterminate Reinforced Concrete Members

Ultimate Capacity of Corroded Statically Indeterminate Reinforced Concrete Members

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Mechanical Properties of 30 Year-Old Naturally Corroded Steel Reinforcing Bars

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