Carbon Fiber Reinforced Polymer (CFRP) for Structural Capacity Enhancement of RC Beams Incorporating Innovative Side Hybrid (SH) Technique

Md. Akter Hosen; Mahaad Issa Shammas; Khalid Ahmed Al Kaaf; Mohd Zamin Jumaat; U. Johnson Alengaram; Nor Hafizah Ramli Sulong; Huzaifa Bin Hashim

doi:10.3390/buildings14071919

Buildings (Jun 2024)

Carbon Fiber Reinforced Polymer (CFRP) for Structural Capacity Enhancement of RC Beams Incorporating Innovative Side Hybrid (SH) Technique

Md. Akter Hosen,
Mahaad Issa Shammas,
Khalid Ahmed Al Kaaf,
Mohd Zamin Jumaat,
U. Johnson Alengaram,
Nor Hafizah Ramli Sulong,
Huzaifa Bin Hashim

Affiliations

Md. Akter Hosen: Department of Civil and Environmental Engineering, College of Engineering, Dhofar University, Salalah P.O Box 2509, Oman
Mahaad Issa Shammas: Department of Civil and Environmental Engineering, College of Engineering, Dhofar University, Salalah P.O Box 2509, Oman
Khalid Ahmed Al Kaaf: Department of Civil and Environmental Engineering, College of Engineering, Dhofar University, Salalah P.O Box 2509, Oman
Mohd Zamin Jumaat: Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
U. Johnson Alengaram: Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
Nor Hafizah Ramli Sulong: School of Civil & Environmental Engineering and Group of Sustainable Engineered Construction Materials, Faculty of Engineering, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia
Huzaifa Bin Hashim: Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia

DOI: https://doi.org/10.3390/buildings14071919
Journal volume & issue: Vol. 14, no. 7
p. 1919

Abstract

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Reinforced concrete (RC) infrastructure is an essential part of modern civilization. However, the serviceability of RC infrastructure in extreme weather has become challenging due to the susceptibility of the initiation of cracks. Hence, the demand for strengthening and retrofitting RC infrastructure is rapidly increasing. The RC specimens strengthened with existing externally bonded reinforcement (EBR) and near-surface mounted (NSM) techniques; however, they suffered a prematurely brittle or debonding failure. Hence, the merging of side near surface mounting (SNSM) and side externally bonded reinforcement (S-EBR) methods ended up resulting in the development of an innovative side hybrid (SH) strengthening approach that is designed to overcome these drawbacks. In this investigation, six rectangular RC beam specimens were flexurally strengthened utilizing carbon fiber-reinforced polymer (CFRP) with the SH technique, and then four-point bending experiments were performed to failure. The beam specimens were categorized into two types: (I) control specimens and (II) specimens strengthened with the SH technique applying CFRP varying bonded length from 1600 mm to 1900 mm. The initial cracking, yield, and ultimate load-bearing capabilities, deflection, failure modes, cracking characteristics, stiffness, energy absorption capacity, and strain on the utmost fiber of concrete, the tensile strain of major steel rebars, SNSM bars, and S-EB plates were assessed from the experimental investigation. The SH technique substantially improved the flexural performance of the beam specimens. The initial cracking load, yield, and ultimate load-bearing capabilities were enhanced remarkably by 387%, 108%, and 163%, respectively, over the reference specimen. The flexural stiffness and energy absorption capacity substantially improved by 120% and 103%, respectively, compared with the reference specimen.

Published in Buildings

ISSN: 2075-5309 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Building construction
Website: https://www.mdpi.com/journal/buildings

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