Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

This study investigates the possibility of replacing the minimum web reinforcement in deep beams with discrete fibers. Additionally, the equivalent dosage of fibers required to obtain similar performance of the deep beam with minimum web reinforcement is investigated. Deep beams made of plain concre...

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Autores principales:	Murali Sagar Varma Sagi, Chandrashekhar Lakavath, S. Suriya Prakash, Akanshu Sharma
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	deep beams steel fibers macro-synthetic fibers minimum shear reinforcement web reinforcement Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999
Acceso en línea:	https://doaj.org/article/18874caa9ec14654aa9cc59b5ba750b4
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spelling	oai:doaj.org-article:18874caa9ec14654aa9cc59b5ba750b42021-11-25T17:31:19ZExperimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams10.3390/fib91100732079-6439https://doaj.org/article/18874caa9ec14654aa9cc59b5ba750b42021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6439/9/11/73https://doaj.org/toc/2079-6439This study investigates the possibility of replacing the minimum web reinforcement in deep beams with discrete fibers. Additionally, the equivalent dosage of fibers required to obtain similar performance of the deep beam with minimum web reinforcement is investigated. Deep beams made of plain concrete with no fibers, beams with minimum web reinforcement as per AASHTO LFRD recommendations (0.3% in both horizontal and vertical), and with a 0.5% volume fraction of steel, macro-synthetic and hybrid fibers are tested at a shear span to height ratio (<i>a/h</i>) of one. Test results show that the presence of 0.3% web reinforcement in horizontal and vertical directions increased the peak load by 25% compared to the plain concrete beams. However, it did not significantly change the first diagonal crack load. With the addition of 0.5% of steel, macro-synthetic and hybrid fibers, the peak load increased by 49%, 42%, and 63%, respectively, compared to the plain concrete specimen. The addition of steel fibers significantly improved the first cracking load. In contrast, macro-synthetic fibers did not affect the first cracking load but improved the ductility with higher deflections at peak. Hybridization of steel and macro synthetic fibers showed improved performance compared to the individual fibers of the same volume in peak load and ductility. Test results showed that a 0.5% volume fraction of discrete macro steel or synthetic or hybrid fibers can be used to completely replace the minimum web reinforcement (0.3% in both directions).Murali Sagar Varma SagiChandrashekhar LakavathS. Suriya PrakashAkanshu SharmaMDPI AGarticledeep beamssteel fibersmacro-synthetic fibersminimum shear reinforcementweb reinforcementChemicals: Manufacture, use, etc.TP200-248Textile bleaching, dyeing, printing, etc.TP890-933Biology (General)QH301-705.5PhysicsQC1-999ENFibers, Vol 9, Iss 73, p 73 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	deep beams steel fibers macro-synthetic fibers minimum shear reinforcement web reinforcement Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999
spellingShingle	deep beams steel fibers macro-synthetic fibers minimum shear reinforcement web reinforcement Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999 Murali Sagar Varma Sagi Chandrashekhar Lakavath S. Suriya Prakash Akanshu Sharma Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
description	This study investigates the possibility of replacing the minimum web reinforcement in deep beams with discrete fibers. Additionally, the equivalent dosage of fibers required to obtain similar performance of the deep beam with minimum web reinforcement is investigated. Deep beams made of plain concrete with no fibers, beams with minimum web reinforcement as per AASHTO LFRD recommendations (0.3% in both horizontal and vertical), and with a 0.5% volume fraction of steel, macro-synthetic and hybrid fibers are tested at a shear span to height ratio (<i>a/h</i>) of one. Test results show that the presence of 0.3% web reinforcement in horizontal and vertical directions increased the peak load by 25% compared to the plain concrete beams. However, it did not significantly change the first diagonal crack load. With the addition of 0.5% of steel, macro-synthetic and hybrid fibers, the peak load increased by 49%, 42%, and 63%, respectively, compared to the plain concrete specimen. The addition of steel fibers significantly improved the first cracking load. In contrast, macro-synthetic fibers did not affect the first cracking load but improved the ductility with higher deflections at peak. Hybridization of steel and macro synthetic fibers showed improved performance compared to the individual fibers of the same volume in peak load and ductility. Test results showed that a 0.5% volume fraction of discrete macro steel or synthetic or hybrid fibers can be used to completely replace the minimum web reinforcement (0.3% in both directions).
format	article
author	Murali Sagar Varma Sagi Chandrashekhar Lakavath S. Suriya Prakash Akanshu Sharma
author_facet	Murali Sagar Varma Sagi Chandrashekhar Lakavath S. Suriya Prakash Akanshu Sharma
author_sort	Murali Sagar Varma Sagi
title	Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
title_short	Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
title_full	Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
title_fullStr	Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
title_full_unstemmed	Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams
title_sort	experimental study on evaluation of replacing minimum web reinforcement with discrete fibers in rc deep beams
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/18874caa9ec14654aa9cc59b5ba750b4
work_keys_str_mv	AT muralisagarvarmasagi experimentalstudyonevaluationofreplacingminimumwebreinforcementwithdiscretefibersinrcdeepbeams AT chandrashekharlakavath experimentalstudyonevaluationofreplacingminimumwebreinforcementwithdiscretefibersinrcdeepbeams AT ssuriyaprakash experimentalstudyonevaluationofreplacingminimumwebreinforcementwithdiscretefibersinrcdeepbeams AT akanshusharma experimentalstudyonevaluationofreplacingminimumwebreinforcementwithdiscretefibersinrcdeepbeams
_version_	1718412210414288896

Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

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