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A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results

Fiber-reinforced polymers (FRPs) are widely used within civil structural applications either for structural retrofitting or new constructions. This is due to their appreciable mechanical properties such as high stiffness and strength, resistance to environmental effects, as well low density. Through...

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Detalles Bibliográficos
Autores principales: Damiani, Marco, Nisticò, Nicola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268953/
https://www.ncbi.nlm.nih.gov/pubmed/35808718
http://dx.doi.org/10.3390/polym14132675
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author Damiani, Marco
Nisticò, Nicola
author_facet Damiani, Marco
Nisticò, Nicola
author_sort Damiani, Marco
collection PubMed
description Fiber-reinforced polymers (FRPs) are widely used within civil structural applications either for structural retrofitting or new constructions. This is due to their appreciable mechanical properties such as high stiffness and strength, resistance to environmental effects, as well low density. Through the years, such peculiarities have encouraged researchers to apply FRP cables within the design of prestressing systems, where steel cables are systematically adopted. However, the brittleness intrinsic to FRP materials necessitates additional efforts to design the anchorage devices. In fact, tendons are here subjected to stress peaks, which need to be controlled in order to prevent the premature failure of the cable. Following this goal, authors recently studied an optimized split-wedge anchorage, for 12 mm-diameter pultruded-carbon-fiber-reinforced polymer (PCFRP) tendons, adopting double-angle (DA) wedges, and compared its performance with a single-angle (SA) wedge configuration. Tensile tests were performed on 3 SA and 2 DA prototypes, respectively, through a universal testing machine: the DA configuration exploited the average cable capacity (257 kN) once, denoting a maximum efficiency. The obtained experimental results are utilized, in the framework of the present work, to calibrate contact parameters of nonlinear finite element models. The presented numerical results helped to assess benefits of the proposed configurations and the behavior of the anchorage components: the DA configuration turned out to satisfactorily avoid stress peak superpositions on the cable, with a reduction in pressure in the loading end of the cable with respect to the SA model.
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spelling pubmed-92689532022-07-09 A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results Damiani, Marco Nisticò, Nicola Polymers (Basel) Article Fiber-reinforced polymers (FRPs) are widely used within civil structural applications either for structural retrofitting or new constructions. This is due to their appreciable mechanical properties such as high stiffness and strength, resistance to environmental effects, as well low density. Through the years, such peculiarities have encouraged researchers to apply FRP cables within the design of prestressing systems, where steel cables are systematically adopted. However, the brittleness intrinsic to FRP materials necessitates additional efforts to design the anchorage devices. In fact, tendons are here subjected to stress peaks, which need to be controlled in order to prevent the premature failure of the cable. Following this goal, authors recently studied an optimized split-wedge anchorage, for 12 mm-diameter pultruded-carbon-fiber-reinforced polymer (PCFRP) tendons, adopting double-angle (DA) wedges, and compared its performance with a single-angle (SA) wedge configuration. Tensile tests were performed on 3 SA and 2 DA prototypes, respectively, through a universal testing machine: the DA configuration exploited the average cable capacity (257 kN) once, denoting a maximum efficiency. The obtained experimental results are utilized, in the framework of the present work, to calibrate contact parameters of nonlinear finite element models. The presented numerical results helped to assess benefits of the proposed configurations and the behavior of the anchorage components: the DA configuration turned out to satisfactorily avoid stress peak superpositions on the cable, with a reduction in pressure in the loading end of the cable with respect to the SA model. MDPI 2022-06-30 /pmc/articles/PMC9268953/ /pubmed/35808718 http://dx.doi.org/10.3390/polym14132675 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
Damiani, Marco
Nisticò, Nicola
A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title_full A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title_fullStr A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title_full_unstemmed A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title_short A Split-Wedge Anchorage for CFRP Cables: Numerical Model vs. Experimental Results
title_sort split-wedge anchorage for cfrp cables: numerical model vs. experimental results
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268953/
https://www.ncbi.nlm.nih.gov/pubmed/35808718
http://dx.doi.org/10.3390/polym14132675
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