Reinforced Concrete Beams Strengthened in Flexure with Near-Surface Mounted 7075 Aluminum Alloy Bars
Publication: Journal of Structural Engineering
Volume 148, Issue 1
Abstract
The flexural behavior of reinforced concrete (RC) beams strengthened with near-surface mounted (NSM) 7075 aluminum alloy (AA) bars was investigated through experimental testing. In particular, 10 RC beams strengthened with NSM AA bars and one control beam were tested under four-point bending loading. The experimental variables included NSM reinforcement ratio, bonded length of NSM reinforcement, end anchoring of NSM reinforcement, and type of bonding agent. The test results were evaluated in terms of the load-deflection curves, failure modes, ductility, and strains in NSM reinforcements, and the effects of different test parameters on the effectiveness of the proposed strengthening approach were discussed. In addition, analytical models were developed to predict the load-bearing capacities of strengthened beams failed by intermediate crack debonding and concrete cover separation, respectively. The RC beams strengthened with NSM AA bars exhibited a significant improvement in maximum load ranging from 35% to 120% over the reference specimen.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. The data include the computational and experimental results and the experiment raw data.
Acknowledgments
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 51868073), Special Funds for Technology Innovation Guidance of Shaanxi (No. 2019CGHJ-06), and Special Fund for Basic Scientific Research of Central Colleges (No. 300102288302).
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Published In
Journal of Structural Engineering
Volume 148 • Issue 1 • January 2022
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© 2021 American Society of Civil Engineers.
History
Received: Dec 29, 2020
Accepted: Aug 20, 2021
Published online: Oct 25, 2021
Published in print: Jan 1, 2022
Discussion open until: Mar 25, 2022
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Cited by
- Guohua Xing, Xiangyu Li, Zhaoqun Chang, Osman E. Ozbulut, Behavior of RC Beams Strengthened with Near-Surface Mounted Aluminum Alloy Bars under Fully Reversible Cyclic Loads, Journal of Bridge Engineering, 10.1061/(ASCE)BE.1943-5592.0001950, 27, 11, (2022).