Rehabilitation of RC Beams with Web Openings Using Alkali-Activated Fiber-Reinforced U-Jacket
Publication: Journal of Performance of Constructed Facilities
Volume 37, Issue 6
Abstract
The structural performance of a damaged web opened beam repaired and strengthened by U-shaped jacketing with fiber-reinforced geopolymer concrete (FRGC) is evaluated. Reinforced concrete (RC) beams with openings in the flexure (BMS) and shear (BSS) are initially tested to their ultimate loading. The damaged beams are repaired using geopolymer mortar (GM), followed by strengthening using three-sided FRGC jackets. To assess the efficiency of the noble strengthening technique, portland-based cement mortar (PCM) and fiber-reinforced cement concrete are also used as an alternative jacketing agent. The test results indicate that FRGC material can effectively restore the structure to its functional use at the earliest possible time. The BMS-type jacketed beam exhibits improved stiffness with enhanced load carrying capacity 1.3 times higher than the original beam. However, the effect of FRGC jacketing is found to be more effective in enhancing the load carrying capacity of the BSS-type by 1.75 times higher than the original specimen. All jacketed specimens exhibit deflection hardening behavior with improved deformation capacity leading to improved ductility.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors acknowledge Alccofine micro materials, India, and Northeast Chemicals, Guwahati, India, for supplying the materials required for this research at IIT Guwahati.
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 37 • Issue 6 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Feb 11, 2023
Accepted: Jul 18, 2023
Published online: Sep 29, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 29, 2024
ASCE Technical Topics:
- Beams
- Concrete
- Concrete beams
- Construction engineering
- Construction methods
- Engineering materials (by type)
- Fiber reinforced concrete
- Foundation design
- Foundations
- Geotechnical engineering
- Load bearing capacity
- Material mechanics
- Material properties
- Materials engineering
- Polymer
- Rehabilitation
- Reinforced concrete
- Strength of materials
- Structural engineering
- Structural members
- Structural systems
- Synthetic materials
- Web beams
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