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Title
Japanese:ひずみ時効による鉄筋の特性変化の予測式の構築 
English:PREDICTION MODEL FOR CHANGE SINREIN FORCEMENT PROPERTIES DUE TO STRAIN AGEING 
Author
Japanese: 岡村光晋, Alex Shegay, 佐藤大樹.  
English: Koshin Okamura, Alex Shegay, Daiki Sato.  
Language Japanese 
Journal/Book name
Japanese:日本建築学会技術報告集 
English:AIJ Journal of Technology and Design 
Volume, Number, Page Vol. 30    No. 76    pp. 1263-1268
Published date Oct. 2024 
Publisher
Japanese:一般社団法人 日本建築学会 
English:Architectural Institute of Japan 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.3130/aijt.30.1263
Abstract Strain ageing of reinforcement is one factor that can affect the future seismic performance of damaged RC buildings. In this paper, tensile tests were conducted on 84 steel reinforcement specimens　and it was found that the factors that control the reduction in ductility and increase in strength of reinforcement due to strain ageing are vanadium content, ageing period, and pre-strain. Equations were proposed to predict the change in reinforcement properties due to strain ageing. Verification of the proposed models against previous studies showed that ductility was reasonably predicted while strength increase could be predicted to within a 10% error margin.

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