Cargando…

Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads

Current technology development ensures a variety of advanced materials and options for reinforcing concrete structures. However, the absence of a uniform testing methodology complicates the quantification and comparative analysis of the mechanical performance of the composite systems. The repeated m...

Descripción completa

Detalles Bibliográficos
Autores principales: Sultani, Haji Akbar, Sokolov, Aleksandr, Rimkus, Arvydas, Gribniak, Viktor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10459269/
https://www.ncbi.nlm.nih.gov/pubmed/37631450
http://dx.doi.org/10.3390/polym15163393
_version_ 1785097370233470976
author Sultani, Haji Akbar
Sokolov, Aleksandr
Rimkus, Arvydas
Gribniak, Viktor
author_facet Sultani, Haji Akbar
Sokolov, Aleksandr
Rimkus, Arvydas
Gribniak, Viktor
author_sort Sultani, Haji Akbar
collection PubMed
description Current technology development ensures a variety of advanced materials and options for reinforcing concrete structures. However, the absence of a uniform testing methodology complicates the quantification and comparative analysis of the mechanical performance of the composite systems. The repeated mechanical loads further complicate the issue. This research extends the recently developed residual stiffness assessment concept to the repeated loading case. It provides an engineer with a simplified testing layout and analytical model to quantify the residual flexural stiffness of standardized laboratory specimens subjected to repeated cycling loads. This model explicitly relates the particular moment and curvature values, requiring neither iterative calculations nor the load history. Thus, this feature allows residual stiffness quantification under repeated loading conditions, including complete reloading of the beam samples imitating the structural strengthening procedure; the proposed technique is equally efficient in quantifying the residual stiffness of the beam samples with any combinations of fiber-reinforced polymer (FRP) reinforcements, i.e., embedded bars, near-surface-mounted strips, and externally bonded sheets. This study employs 12 flexural elements with various reinforcement and loading layouts to illustrate the proposed methodology’s efficiency in quantifying the residual strength of the tension concrete, which estimates the efficiency of the reinforcement system. The explicit quantifying of the residual resistance of the FRP reinforcement systems under repeated load cycles describes the essential novelty of this work.
format Online
Article
Text
id pubmed-10459269
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-104592692023-08-27 Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads Sultani, Haji Akbar Sokolov, Aleksandr Rimkus, Arvydas Gribniak, Viktor Polymers (Basel) Article Current technology development ensures a variety of advanced materials and options for reinforcing concrete structures. However, the absence of a uniform testing methodology complicates the quantification and comparative analysis of the mechanical performance of the composite systems. The repeated mechanical loads further complicate the issue. This research extends the recently developed residual stiffness assessment concept to the repeated loading case. It provides an engineer with a simplified testing layout and analytical model to quantify the residual flexural stiffness of standardized laboratory specimens subjected to repeated cycling loads. This model explicitly relates the particular moment and curvature values, requiring neither iterative calculations nor the load history. Thus, this feature allows residual stiffness quantification under repeated loading conditions, including complete reloading of the beam samples imitating the structural strengthening procedure; the proposed technique is equally efficient in quantifying the residual stiffness of the beam samples with any combinations of fiber-reinforced polymer (FRP) reinforcements, i.e., embedded bars, near-surface-mounted strips, and externally bonded sheets. This study employs 12 flexural elements with various reinforcement and loading layouts to illustrate the proposed methodology’s efficiency in quantifying the residual strength of the tension concrete, which estimates the efficiency of the reinforcement system. The explicit quantifying of the residual resistance of the FRP reinforcement systems under repeated load cycles describes the essential novelty of this work. MDPI 2023-08-13 /pmc/articles/PMC10459269/ /pubmed/37631450 http://dx.doi.org/10.3390/polym15163393 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
Sultani, Haji Akbar
Sokolov, Aleksandr
Rimkus, Arvydas
Gribniak, Viktor
Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title_full Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title_fullStr Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title_full_unstemmed Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title_short Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads
title_sort quantifying the residual stiffness of concrete beams with polymeric reinforcement under repeated loads
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10459269/
https://www.ncbi.nlm.nih.gov/pubmed/37631450
http://dx.doi.org/10.3390/polym15163393
work_keys_str_mv AT sultanihajiakbar quantifyingtheresidualstiffnessofconcretebeamswithpolymericreinforcementunderrepeatedloads
AT sokolovaleksandr quantifyingtheresidualstiffnessofconcretebeamswithpolymericreinforcementunderrepeatedloads
AT rimkusarvydas quantifyingtheresidualstiffnessofconcretebeamswithpolymericreinforcementunderrepeatedloads
AT gribniakviktor quantifyingtheresidualstiffnessofconcretebeamswithpolymericreinforcementunderrepeatedloads