Effectiveness of Hybrid Fibers on the Fracture and Shear Behavior of Prestressed Concrete Beams

Lakavath, Chandrashekhar and Bhosale, Aniket B. and Prakash, Suriya S and et al, . (2022) Effectiveness of Hybrid Fibers on the Fracture and Shear Behavior of Prestressed Concrete Beams. Fibers, 10 (3). pp. 1-26. ISSN 2079-6439

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Abstract

This study investigates the effectiveness of hybrid fibers (steel and macro‐synthetic) on the shear behavior of prestressed concrete beams. The hybrid fiber combination was selected to avoid workability issues at high volume dosages and ensure effective crack arresting over the crack opening range. Fracture studies included testing notched concrete prisms to identify the role of hybrid fibers in the crack bridging mechanism. Seven hybrid fiber reinforced prestressed concrete (HFRPC) beams were tested at a low shear span (a) to depth (d) ratio of 2.4. The effects of hybrid fibers on load–deflection behavior and strain in the strand are reported. Similarly, the crack opening, crack slip and crack angle variation regarding applied shear were investigated using the digital image correlation (DIC) technique. Test results of HFRPC beams showed considerable improvements in peak load and the post‐peak response with a higher hybrid fiber dosage. The crack opening and crack slip measurement across the major shear crack revealed continuous dilatant behavior. The kinematic response of critical shear crack reflects the sustained dilation response up to the ultimate load, which depends on the critical shear crack angle of the tested beams. As the fiber dosage increases, the shear crack slip and width are reduced, indicating the roles of hybrid fibers in improving ductility and the change in failure mode from brittle shear tension to relatively ductile shear tension. © 2022 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: “Utchattar Avishkar Yojana (UAY) Scheme, Government of India through Grant No: YSS/2015/000677” by the Ministry of Human Resources Development, Department of Science and Technology; and the Prime Minister Research Fellowship—India, Project Number CE19RESCH11007.

Uncontrolled Keywords:

hybrid fibers (steel and macro‐synthetic), concrete beams, hybrid fiber reinforced prestressed concrete (HFRPC) beams, digital image correlation (DIC) technique.

Subjects:

Civil Engineering > Construction & Building Technology
Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

22 Jul 2022 06:13

Last Modified:

22 Jul 2022 06:13

URI:

http://raiithold.iith.ac.in/id/eprint/9583