Cargando…

Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete

Textile-reinforced concrete is becoming more and more popular. The material enables the realization of very thin structures and shells, often with organic shapes. However, a problem with this reinforcement occurs when the structure is bent (contains a corner), and the flexural stiffness around this...

Descripción completa

Detalles Bibliográficos
Autores principales: Žalský, Jiří, Vlach, Tomáš, Řepka, Jakub, Hájek, Jakub, Hájek, Petr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9863995/
https://www.ncbi.nlm.nih.gov/pubmed/36679254
http://dx.doi.org/10.3390/polym15020376
_version_ 1784875473393680384
author Žalský, Jiří
Vlach, Tomáš
Řepka, Jakub
Hájek, Jakub
Hájek, Petr
author_facet Žalský, Jiří
Vlach, Tomáš
Řepka, Jakub
Hájek, Jakub
Hájek, Petr
author_sort Žalský, Jiří
collection PubMed
description Textile-reinforced concrete is becoming more and more popular. The material enables the realization of very thin structures and shells, often with organic shapes. However, a problem with this reinforcement occurs when the structure is bent (contains a corner), and the flexural stiffness around this bent area is required. This article presents the design, solution, and load-bearing capacity of an L-shaped rigid frame made of textile-reinforced concrete. Basic material parameters of concrete matrix and carbon textile reinforcement were supplemented by a four-point bending test to calibrate fracture energy Gf, critical compressive displacement Wd, solver type, and other parameters of a numerical model created by Atena Engineering in specialized non-linear structural analysis software for reinforced concrete structures. The calibrated numerical model was used to evaluate different variants of carbon textile reinforcement of the L-shaped frame. The carbon textile reinforcement was homogenized using epoxy resin to ensure the interaction of all fibers, and its surface was modified with fine-grained silica sand to increase the cohesion with the concrete matrix. Specimens were produced based on the most effective variant of the L-shaped frame reinforcement to be experimentally tested. Thanks to the original shaping and anchoring of the reinforcement in the corner area, the frame with composite textile reinforcement is rigid and can transmit the bending stresses in both positive and negative directions. The results of the mechanical loading test on small experimental specimens correspond well to the results of numerical modeling using Atena Engineering software.
format Online
Article
Text
id pubmed-9863995
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-98639952023-01-22 Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete Žalský, Jiří Vlach, Tomáš Řepka, Jakub Hájek, Jakub Hájek, Petr Polymers (Basel) Article Textile-reinforced concrete is becoming more and more popular. The material enables the realization of very thin structures and shells, often with organic shapes. However, a problem with this reinforcement occurs when the structure is bent (contains a corner), and the flexural stiffness around this bent area is required. This article presents the design, solution, and load-bearing capacity of an L-shaped rigid frame made of textile-reinforced concrete. Basic material parameters of concrete matrix and carbon textile reinforcement were supplemented by a four-point bending test to calibrate fracture energy Gf, critical compressive displacement Wd, solver type, and other parameters of a numerical model created by Atena Engineering in specialized non-linear structural analysis software for reinforced concrete structures. The calibrated numerical model was used to evaluate different variants of carbon textile reinforcement of the L-shaped frame. The carbon textile reinforcement was homogenized using epoxy resin to ensure the interaction of all fibers, and its surface was modified with fine-grained silica sand to increase the cohesion with the concrete matrix. Specimens were produced based on the most effective variant of the L-shaped frame reinforcement to be experimentally tested. Thanks to the original shaping and anchoring of the reinforcement in the corner area, the frame with composite textile reinforcement is rigid and can transmit the bending stresses in both positive and negative directions. The results of the mechanical loading test on small experimental specimens correspond well to the results of numerical modeling using Atena Engineering software. MDPI 2023-01-10 /pmc/articles/PMC9863995/ /pubmed/36679254 http://dx.doi.org/10.3390/polym15020376 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
Žalský, Jiří
Vlach, Tomáš
Řepka, Jakub
Hájek, Jakub
Hájek, Petr
Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title_full Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title_fullStr Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title_full_unstemmed Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title_short Reinforced L-Shaped Frame Made of Textile-Reinforced Concrete
title_sort reinforced l-shaped frame made of textile-reinforced concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9863995/
https://www.ncbi.nlm.nih.gov/pubmed/36679254
http://dx.doi.org/10.3390/polym15020376
work_keys_str_mv AT zalskyjiri reinforcedlshapedframemadeoftextilereinforcedconcrete
AT vlachtomas reinforcedlshapedframemadeoftextilereinforcedconcrete
AT repkajakub reinforcedlshapedframemadeoftextilereinforcedconcrete
AT hajekjakub reinforcedlshapedframemadeoftextilereinforcedconcrete
AT hajekpetr reinforcedlshapedframemadeoftextilereinforcedconcrete