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Nonlinear cyclic response of corrosion-damaged reinforcing bars with the effect of buckling

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Title: Nonlinear cyclic response of corrosion-damaged reinforcing bars with the effect of buckling
Authors: Kashani, Mohammad M. mehdi.kashani@bristol.ac.uk, Crewe, Adam J.1, Alexander, Nicholas A.1
Source: Construction & Building Materials. Apr2013, Vol. 41, p388-400. 13p.
Subjects: Corrosion of reinforcing bars, Nonlinear systems, Mechanical buckling, Deterioration of concrete, Concrete bridges, Chlorides, Structural analysis (Engineering)
Abstract: Abstract: Corrosion of reinforcing bars is the most common reason for the premature deterioration of reinforced concrete structures and bridges in a chloride laden environment. There are large numbers of existing reinforced concrete bridges in earthquake prone regions that are suffering from corrosion. Therefore, in this paper, the effect of corrosion on cyclic response of reinforcing bars is investigated experimentally. A total of 39 corroded reinforcing bars with varying mass loss and slenderness ratios have been tested. The effect of corrosion on the buckling behaviour of bars in compression, their fracture in tension and their hysteresis response is investigated. Furthermore, an analytical model is proposed to describe the low-cycle high amplitude fatigue degradation of corroded bars. The results of the experimental investigation show that corrosion has a significant influence on the buckling behaviour of corroded bars in compression and also changes their hysteresis response. For a few bars the localised corrosion also caused fracture of corroded bars in tension after a significant buckling episode in the previous compression cycle. The proposed corrosion extended low-cycle fatigue and inelastic buckling models have been incorporated into the existing material models and simulated computationally for the whole cyclic loops. A good qualitative fit is observed between the computational simulation and the experimental response when the corrosion is relatively uniform along the bar. However, some disagreements were found between the computational and experimental responses in cases where the corroded bars had severe and localised pitting corrosion. It was observed that the most important parameter governing the nonlinear cyclic response is the distribution of localised pitting corrosion along the length of the corroded bars. [Copyright &y& Elsevier]
Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 85902788
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Nonlinear cyclic response of corrosion-damaged reinforcing bars with the effect of buckling
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  Data: <searchLink fieldCode="AR" term="%22Kashani%2C+Mohammad+M%2E%22">Kashani, Mohammad M.</searchLink><i> mehdi.kashani@bristol.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Crewe%2C+Adam+J%2E%22">Crewe, Adam J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Alexander%2C+Nicholas+A%2E%22">Alexander, Nicholas A.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Apr2013, Vol. 41, p388-400. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Corrosion+of+reinforcing+bars%22">Corrosion of reinforcing bars</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+systems%22">Nonlinear systems</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+buckling%22">Mechanical buckling</searchLink><br /><searchLink fieldCode="DE" term="%22Deterioration+of+concrete%22">Deterioration of concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+bridges%22">Concrete bridges</searchLink><br /><searchLink fieldCode="DE" term="%22Chlorides%22">Chlorides</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink>
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  Label: Abstract
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  Data: Abstract: Corrosion of reinforcing bars is the most common reason for the premature deterioration of reinforced concrete structures and bridges in a chloride laden environment. There are large numbers of existing reinforced concrete bridges in earthquake prone regions that are suffering from corrosion. Therefore, in this paper, the effect of corrosion on cyclic response of reinforcing bars is investigated experimentally. A total of 39 corroded reinforcing bars with varying mass loss and slenderness ratios have been tested. The effect of corrosion on the buckling behaviour of bars in compression, their fracture in tension and their hysteresis response is investigated. Furthermore, an analytical model is proposed to describe the low-cycle high amplitude fatigue degradation of corroded bars. The results of the experimental investigation show that corrosion has a significant influence on the buckling behaviour of corroded bars in compression and also changes their hysteresis response. For a few bars the localised corrosion also caused fracture of corroded bars in tension after a significant buckling episode in the previous compression cycle. The proposed corrosion extended low-cycle fatigue and inelastic buckling models have been incorporated into the existing material models and simulated computationally for the whole cyclic loops. A good qualitative fit is observed between the computational simulation and the experimental response when the corrosion is relatively uniform along the bar. However, some disagreements were found between the computational and experimental responses in cases where the corroded bars had severe and localised pitting corrosion. It was observed that the most important parameter governing the nonlinear cyclic response is the distribution of localised pitting corrosion along the length of the corroded bars. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.conbuildmat.2012.12.011
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 388
    Subjects:
      – SubjectFull: Corrosion of reinforcing bars
        Type: general
      – SubjectFull: Nonlinear systems
        Type: general
      – SubjectFull: Mechanical buckling
        Type: general
      – SubjectFull: Deterioration of concrete
        Type: general
      – SubjectFull: Concrete bridges
        Type: general
      – SubjectFull: Chlorides
        Type: general
      – SubjectFull: Structural analysis (Engineering)
        Type: general
    Titles:
      – TitleFull: Nonlinear cyclic response of corrosion-damaged reinforcing bars with the effect of buckling
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            NameFull: Kashani, Mohammad M.
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            NameFull: Crewe, Adam J.
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            NameFull: Alexander, Nicholas A.
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            – D: 01
              M: 04
              Text: Apr2013
              Type: published
              Y: 2013
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              Value: 41
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