The Relationship between Rebar-Debonding and Cracking in Reinforced Concrete

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

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A mechanical model has been used to evaluate the rebar-concrete debonding length and Crack Mouth Opening Displacement (CMOD) in reinforced concrete. The modelling is based on the theory of the fictitious crack. It is shown that there is a non-trival relationship between the debonding length and the CMOD, indicating that if the debonding length has a significant influence on the risk of corrosion initiation and propagation (as indicated in the literature), then CMOD cannot be used alone as corrosion risk indicator. A limited parametric study has been performed and it has been shown that the shear strength of the interface has a significant influence on the debonding length. The cover layer – on the other hand – has relatively little influence on the debonding lengths.
Original languageEnglish
Title of host publicationProceedings of the fib Symposium: Concrete Structures for Sustainable Community
Number of pages4
Publication date2012
StatePublished

Conference

Conferencefib Symposium
CountrySweden
CityStockholm
Period11/06/1214/06/12
Internet addresshttp://www.fibstockholm2012.se/

Keywords

  • Theory of the fictitious crack, Debonding length, CMOD, Finite Element Modelling, Reinforced concrete, Three-point bending
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