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

Sagi, Murali Sagar Varma and Lakavath, Chandrashekhar and Prakash, Suriya S and et al, . (2021) Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams. Fibers, 9 (11). p. 73. ISSN 2079-6439

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Abstract

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 (a/h) 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). © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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IITH Creators:

IITH Creators	ORCiD
Prakash, Suriya S	https://orcid.org/0000-0003-0319-1773

Item Type:

Article

Additional Information:

Funding: “IMPRINT Scheme-Order # IMP/2018/000846” by the Ministry of Human Resource Development, Department of Science and Technology, and Prime Minister Research Fellowship-India Project Number # CE19RESCH11007-PMRF.

Uncontrolled Keywords:

Deep beams; Macro-synthetic fibers; Minimum shear reinforcement; Steel fibers; Web reinforcement

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Aug 2022 05:45

Last Modified:

23 Aug 2022 05:45