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Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods

Many researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison o...

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Autores principales: Tworzewski, Paweł, Alexy, Jeffrey K., Barnes, Robert W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9606864/
https://www.ncbi.nlm.nih.gov/pubmed/36295463
http://dx.doi.org/10.3390/ma15207390
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author Tworzewski, Paweł
Alexy, Jeffrey K.
Barnes, Robert W.
author_facet Tworzewski, Paweł
Alexy, Jeffrey K.
Barnes, Robert W.
author_sort Tworzewski, Paweł
collection PubMed
description Many researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison of seven selected models: fib bulletin 14 approach, Teng et al. model, Lu model, Seracino et al. model, Said and Wu model, Elsanadedy et al. model and ACI 440. The accuracy of each model was evaluated based on the test results of 58 flexural specimens with IC debonding failures of externally bonded (EB), carbon FRP plates or sheets found in the existing literature. The experimental database was prepared to include a wide range of parameters affecting the issue under consideration. A comparison of the measured and predicted load capacity values was made to evaluate the prediction accuracy of the considered models. The analysis included the limitation of the load capacity estimated based on IC debonding models as well as concrete crushing and FRP rupture types of failure. The results indicate that the latest models proposed for direct implementation in design guidelines—the Said and Wu model and the Elsanadedy et al. model—offer the best accuracy in predicting the load capacity. In contrast, the fib bulletin 14 approach shows a wide dispersion of predictions and a large proportion of highly overestimated results.
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spelling pubmed-96068642022-10-28 Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods Tworzewski, Paweł Alexy, Jeffrey K. Barnes, Robert W. Materials (Basel) Article Many researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison of seven selected models: fib bulletin 14 approach, Teng et al. model, Lu model, Seracino et al. model, Said and Wu model, Elsanadedy et al. model and ACI 440. The accuracy of each model was evaluated based on the test results of 58 flexural specimens with IC debonding failures of externally bonded (EB), carbon FRP plates or sheets found in the existing literature. The experimental database was prepared to include a wide range of parameters affecting the issue under consideration. A comparison of the measured and predicted load capacity values was made to evaluate the prediction accuracy of the considered models. The analysis included the limitation of the load capacity estimated based on IC debonding models as well as concrete crushing and FRP rupture types of failure. The results indicate that the latest models proposed for direct implementation in design guidelines—the Said and Wu model and the Elsanadedy et al. model—offer the best accuracy in predicting the load capacity. In contrast, the fib bulletin 14 approach shows a wide dispersion of predictions and a large proportion of highly overestimated results. MDPI 2022-10-21 /pmc/articles/PMC9606864/ /pubmed/36295463 http://dx.doi.org/10.3390/ma15207390 Text en © 2022 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
Tworzewski, Paweł
Alexy, Jeffrey K.
Barnes, Robert W.
Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title_full Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title_fullStr Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title_full_unstemmed Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title_short Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
title_sort intermediate crack debonding of externally bonded frp reinforcement—comparison of methods
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9606864/
https://www.ncbi.nlm.nih.gov/pubmed/36295463
http://dx.doi.org/10.3390/ma15207390
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