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Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia

The paper presents statistical analysis of mechanical strength and linear density properties of deformed reinforcing Grade 60 steel bars. Two different lots of samples are identified based on test years for the years 2015–2017 as Lot 1 and 2018–2020 as Lot 2. Yield strength (YS), tensile strength (T...

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Autores principales: Achamyeleh, Tariku, Çamur, Hüseyin, Savaş, Mahmut A., Evcil, Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8850594/
https://www.ncbi.nlm.nih.gov/pubmed/35173250
http://dx.doi.org/10.1038/s41598-022-06654-1
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author Achamyeleh, Tariku
Çamur, Hüseyin
Savaş, Mahmut A.
Evcil, Ali
author_facet Achamyeleh, Tariku
Çamur, Hüseyin
Savaş, Mahmut A.
Evcil, Ali
author_sort Achamyeleh, Tariku
collection PubMed
description The paper presents statistical analysis of mechanical strength and linear density properties of deformed reinforcing Grade 60 steel bars. Two different lots of samples are identified based on test years for the years 2015–2017 as Lot 1 and 2018–2020 as Lot 2. Yield strength (YS), tensile strength (TS), elongation, mass per length and characteristic ratio of TS and YS are analyzed for rebar diameters of 8, 10, 12 and 16 mm considering both lots. Mechanical and linear density properties are compared statistically using range, mean, standard deviation, coefficient of variance, skewness and kurtosis of the recorded sets of values. Moreover, the results of YS, TS and elongation are analyzed separately by one-way analysis of variance for both lots. The result shows that the aggregate mean values of YS, TS and elongation for Lot 1 and Lot 2 are 593.1 MPa, 701.1 MPa, 14.78%; and 572.5 MPa, 673.8 MPa, 15.47%, respectively. Even though there is a slight decrement in values of YS and TS and increment in elongation from Lot 1 to Lot 2, both lots exceeded values recommended by ASTM A615 standard. Furthermore, with 95% confidence interval, one-way analysis of variance showed that the aggregate data of rebars are dissimilar in terms of YS, TS and percentage elongation with figures showing decrement from Lot 1 to Lot 2.
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spelling pubmed-88505942022-02-18 Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia Achamyeleh, Tariku Çamur, Hüseyin Savaş, Mahmut A. Evcil, Ali Sci Rep Article The paper presents statistical analysis of mechanical strength and linear density properties of deformed reinforcing Grade 60 steel bars. Two different lots of samples are identified based on test years for the years 2015–2017 as Lot 1 and 2018–2020 as Lot 2. Yield strength (YS), tensile strength (TS), elongation, mass per length and characteristic ratio of TS and YS are analyzed for rebar diameters of 8, 10, 12 and 16 mm considering both lots. Mechanical and linear density properties are compared statistically using range, mean, standard deviation, coefficient of variance, skewness and kurtosis of the recorded sets of values. Moreover, the results of YS, TS and elongation are analyzed separately by one-way analysis of variance for both lots. The result shows that the aggregate mean values of YS, TS and elongation for Lot 1 and Lot 2 are 593.1 MPa, 701.1 MPa, 14.78%; and 572.5 MPa, 673.8 MPa, 15.47%, respectively. Even though there is a slight decrement in values of YS and TS and increment in elongation from Lot 1 to Lot 2, both lots exceeded values recommended by ASTM A615 standard. Furthermore, with 95% confidence interval, one-way analysis of variance showed that the aggregate data of rebars are dissimilar in terms of YS, TS and percentage elongation with figures showing decrement from Lot 1 to Lot 2. Nature Publishing Group UK 2022-02-16 /pmc/articles/PMC8850594/ /pubmed/35173250 http://dx.doi.org/10.1038/s41598-022-06654-1 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Achamyeleh, Tariku
Çamur, Hüseyin
Savaş, Mahmut A.
Evcil, Ali
Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title_full Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title_fullStr Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title_full_unstemmed Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title_short Mechanical strength variability of deformed reinforcing steel bars for concrete structures in Ethiopia
title_sort mechanical strength variability of deformed reinforcing steel bars for concrete structures in ethiopia
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8850594/
https://www.ncbi.nlm.nih.gov/pubmed/35173250
http://dx.doi.org/10.1038/s41598-022-06654-1
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