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Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars

FRP bars are used in concrete structures as an alternative to steel bars as they have many advantages such as high tensile strength, high strength-to-weight ratio, electromagnetic neutrality, lightweight and no corrosion. There is a perceived lack of standard regulations for the design of concrete c...

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Autores principales: Korentz, Jacek, Czarnecki, Witold
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10007353/
https://www.ncbi.nlm.nih.gov/pubmed/36904402
http://dx.doi.org/10.3390/polym15051161
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author Korentz, Jacek
Czarnecki, Witold
author_facet Korentz, Jacek
Czarnecki, Witold
author_sort Korentz, Jacek
collection PubMed
description FRP bars are used in concrete structures as an alternative to steel bars as they have many advantages such as high tensile strength, high strength-to-weight ratio, electromagnetic neutrality, lightweight and no corrosion. There is a perceived lack of standard regulations for the design of concrete columns with FRP reinforcement, e.g., in Eurocode 2. This paper describes a procedure for predicting the bearing capacity of concrete columns with FRP reinforcement based on the interaction of axial force and bending moment, which was developed on the basis of existing design recommendations and standards. It was shown that the bearing capacity of eccentrically loaded RC sections depends on two parameters, which are the mechanical reinforcement ratio ω and the location of the reinforcement in the cross-section expressed by the β factor. The analyses carried out showed the existence of a singularity in the n–m interaction curve indicating the fact that in a certain loaded range, the curve is concave, and more it was shown that the balance failure point for sections with FRP reinforcement takes place for eccentric tension. A simple procedure for calculating the required reinforcement from any FRP bars in concrete columns was also proposed. Nomograms developed from n–m interaction curves provide for the accurate and rational design of FRP reinforcement in columns.
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spelling pubmed-100073532023-03-12 Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars Korentz, Jacek Czarnecki, Witold Polymers (Basel) Article FRP bars are used in concrete structures as an alternative to steel bars as they have many advantages such as high tensile strength, high strength-to-weight ratio, electromagnetic neutrality, lightweight and no corrosion. There is a perceived lack of standard regulations for the design of concrete columns with FRP reinforcement, e.g., in Eurocode 2. This paper describes a procedure for predicting the bearing capacity of concrete columns with FRP reinforcement based on the interaction of axial force and bending moment, which was developed on the basis of existing design recommendations and standards. It was shown that the bearing capacity of eccentrically loaded RC sections depends on two parameters, which are the mechanical reinforcement ratio ω and the location of the reinforcement in the cross-section expressed by the β factor. The analyses carried out showed the existence of a singularity in the n–m interaction curve indicating the fact that in a certain loaded range, the curve is concave, and more it was shown that the balance failure point for sections with FRP reinforcement takes place for eccentric tension. A simple procedure for calculating the required reinforcement from any FRP bars in concrete columns was also proposed. Nomograms developed from n–m interaction curves provide for the accurate and rational design of FRP reinforcement in columns. MDPI 2023-02-25 /pmc/articles/PMC10007353/ /pubmed/36904402 http://dx.doi.org/10.3390/polym15051161 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Korentz, Jacek
Czarnecki, Witold
Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title_full Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title_fullStr Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title_full_unstemmed Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title_short Prediction of Ultimate Capacity of Concrete Columns Reinforced with FRP Bars
title_sort prediction of ultimate capacity of concrete columns reinforced with frp bars
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10007353/
https://www.ncbi.nlm.nih.gov/pubmed/36904402
http://dx.doi.org/10.3390/polym15051161
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