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Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation

This paper presents the results of direct tensile tests performed on six different FRCM (fabric reinforced cementitious matrix) strengthening systems used for masonry structures. The emphasis was placed on the determination of the mechanical parameters of each tested system and a comparison of their...

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Autores principales: Hojdys, Łukasz, Krajewski, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269619/
https://www.ncbi.nlm.nih.gov/pubmed/34209625
http://dx.doi.org/10.3390/ma14133626
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author Hojdys, Łukasz
Krajewski, Piotr
author_facet Hojdys, Łukasz
Krajewski, Piotr
author_sort Hojdys, Łukasz
collection PubMed
description This paper presents the results of direct tensile tests performed on six different FRCM (fabric reinforced cementitious matrix) strengthening systems used for masonry structures. The emphasis was placed on the determination of the mechanical parameters of each tested system and a comparison of their tensile behaviour in terms of first crack stress, ultimate stress, ultimate strain, cracking pattern, failure mode and idealised tensile stress-strain curve. In addition to the basic mechanical tensile parameters, accidental load eccentricities, matrix tensile strengths, and matrix modules of elasticity were estimated. The results of the tests showed that the tensile behaviour of FRCM composites strongly depends on the parameters of the constituent materials (matrix and fabric). In the tests, tensile failure of reinforcement and fibre slippage within the matrix were observed. The presented research showed that the accidental eccentricities did not substantially affect the obtained results and that the more slender the specimen used, the more consistent the obtained results. The analysis based on a rule of mixtures showed that the direct tensile to flexural tensile strength ratio of the matrixes used in the test was 0.2 to 0.4. Finally, the tensile stress–strain relationship for the tested FRCMs was idealised by a bi- or tri-linear curve.
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spelling pubmed-82696192021-07-10 Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation Hojdys, Łukasz Krajewski, Piotr Materials (Basel) Article This paper presents the results of direct tensile tests performed on six different FRCM (fabric reinforced cementitious matrix) strengthening systems used for masonry structures. The emphasis was placed on the determination of the mechanical parameters of each tested system and a comparison of their tensile behaviour in terms of first crack stress, ultimate stress, ultimate strain, cracking pattern, failure mode and idealised tensile stress-strain curve. In addition to the basic mechanical tensile parameters, accidental load eccentricities, matrix tensile strengths, and matrix modules of elasticity were estimated. The results of the tests showed that the tensile behaviour of FRCM composites strongly depends on the parameters of the constituent materials (matrix and fabric). In the tests, tensile failure of reinforcement and fibre slippage within the matrix were observed. The presented research showed that the accidental eccentricities did not substantially affect the obtained results and that the more slender the specimen used, the more consistent the obtained results. The analysis based on a rule of mixtures showed that the direct tensile to flexural tensile strength ratio of the matrixes used in the test was 0.2 to 0.4. Finally, the tensile stress–strain relationship for the tested FRCMs was idealised by a bi- or tri-linear curve. MDPI 2021-06-29 /pmc/articles/PMC8269619/ /pubmed/34209625 http://dx.doi.org/10.3390/ma14133626 Text en © 2021 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
Hojdys, Łukasz
Krajewski, Piotr
Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title_full Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title_fullStr Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title_full_unstemmed Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title_short Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation
title_sort tensile behaviour of frcm composites for strengthening of masonry structures—an experimental investigation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269619/
https://www.ncbi.nlm.nih.gov/pubmed/34209625
http://dx.doi.org/10.3390/ma14133626
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