Mechanical properties of corroded steel bars in pre-cracked concrete suffering from chloride attack

Lu, Chenghao; Yuan, Siqi; Cheng, Pu; Liu, Ronggui

doi:10.1016/j.conbuildmat.2016.07.032

Cited by 58 publications

(26 citation statements)

References 18 publications

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“…where A ccs and A ccs,f represent the critical cross-sectional area before and after testing, respectively. This behaviour is in contradiction with the linear trend reported by Lu et al (2016). In this work, similar to the behaviour observed for the load, the reduction of necking exhibited a significant initial drop for low corrosion levels.…”

Section: Ultimate and Yielding Strengthcontrasting

confidence: 98%

“…the bars a not TEMPCORE ® . These findings are in line with the results by (Tang et al 2014;Lu et al 2016;Palsson and Mirza 2002) who also used the measured critical crosssectional area to calculate the stress and found no loss in the bar strength associated to corrosion. Nevertheless, it should be noted that studies where the actual cross-sectional area is accurately measured and used to compute the stresses are very scarce and in the existing papers an explanation for this phenomenon is not provided.…”

Section: Ultimate and Yielding Strengthsupporting

confidence: 91%

“…10), whereas most reported experimental results have suggested values of α between 1 and 1.8, see e.g. Tang et al (2014), Imperatore et al 2017, Zhang et al (2012), Cairns et al (2005) and Lu et al (2016). In the present study, fitting the experimental results to an expression of the form of Eq.…”

Section: Ultimate and Yielding Loadmentioning

confidence: 47%

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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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Section: Ultimate and Yielding Strengthcontrasting

confidence: 98%

Section: Ultimate and Yielding Strengthsupporting

confidence: 91%

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

Fernandez

Berrocal

2019

Int J Concr Struct Mater

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“…The corroded steel bars with type HRB400 that were accelerated corroded by electrical technology under a wetting and drying cycle were collected from Ref. [25]. The twelve Ref.…”

Section: Database Versus Condition-specific Datamentioning

confidence: 99%

“…The twelve Ref. [12,[20][21][22][23][24][25][26][27][28][29][30] on artificially corroded steel bars were compiled using the artificial accelerated corrosion steel bar database consisting of 436 records. While corroded steel bars from Ref.…”

Section: Database Versus Condition-specific Datamentioning

confidence: 99%

Re-analyzing the mechanical properties of corroded steel bar based on similarity measure

et al. 2020

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In this paper, the records of steel bar mechanical behavior that are similar to condition-specific data are sifted from the corroded steel bar database based on a similarity measure method. The similarity of mechanical behavior between the corroded steel bar database and the corroded steel samples under certain conditions are analyzed by the similarity measure S. The sifted records can be used for linear regression analysis and combined with limited condition-specific data to obtain a larger coefficient of determination R 2 as there are more similar steel bar corrosion characteristics that are relevant to the condition-specific data. It is found that nearly all of the sifted records in the database share the same certain conditions which are similar to the condition-specific data.

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A simplified stress–strain relationship for the mechanical behavior of corroded prestressing strands: The SCPS‐model

Franceschini

Belletti

Tondolo

2022

Structural Concrete

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This article presents a simplified stress-strain relationship for the definition of the mechanical behavior of prestressing strands subjected to chloride-induced corrosion, named SCPS-model (Simplified Model for Corroded Prestressing Strands).The constitutive law adopts the equivalent spring model, that reproduces the overall behavior of a corroded strand by summing the contributions of each wire, assumed as a spring working in parallel to the others. The SCPS-model is designed for the application in the daily engineering practice; to this aim, it is based on a single input parameter that is the maximum penetration depth of the most corroded wire. Following a detailed description of the model formulation and parameters, the article shows the validation of the stress-strain relationship through several comparisons with experimental tensile test outcomes coming from scientific literature. Finally, a statistical analysis of the dimensionless ratio of experimental and analytical results in terms of ultimate corroded strength and strain is carried out to demonstrate the effectiveness of the SCPS-model. Concluding, the accurate and safe side prediction of the residual mechanical behavior of corroded prestressing strands is proposed using the SCPS-model.

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Mechanical properties of corroded steel bars in pre-cracked concrete suffering from chloride attack

Cited by 58 publications

References 18 publications

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

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

Re-analyzing the mechanical properties of corroded steel bar based on similarity measure

A simplified stress–strain relationship for the mechanical behavior of corroded prestressing strands: The SCPS‐model

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