Review on FRP Strengthened Concrete Structures: Current Advances, Challenges and Emerging Innovations

Manquan Li; Yingshi Du; Manlin Li

doi:10.54254/2755-2721/2025.GL24467

Applied and Computational EngineeringOpen access

Review on FRP Strengthened Concrete Structures: Current Advances, Challenges and Emerging Innovations

Research Article

Open Access

Review on FRP Strengthened Concrete Structures: Current Advances, Challenges and Emerging Innovations

Manquan Li ^1* Yingshi Du ², Manlin Li ³

¹ Hohai-Lille Institute, Hohai University, Nanjing, China, 210098

² Environment Institute, South China Normal University, Guangzhou, China, 511400

³ School of Civil and Transportation Engineering, Guangdong University of Technology, Guangdong, China, 510006

^*Corresponding author: manquan_li@163.com

Published on 4 July 2025

ACE Vol.172

ISSN (Print): 2755-273X

ISSN (Online): 2755-2721

ISBN (Print): 978-1-80590-221-8

ISBN (Online): 978-1-80590-222-5

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Abstract

Fiber-Reinforced Polymer (FRP) composites have revolutionized the rehabilitation of aging concrete structures by addressing limitations of traditional materials, such as corrosion susceptibility and heavyweight. FRP variants—carbon, glass, basalt, and aramid—offer exceptional strength-to-weight ratios, corrosion resistance, and adaptability, enabling non-invasive retrofitting via externally bonded (EB) laminates, near-surface mounted (NSM) bars, and prefabricated grids. These techniques enhance flexural, shear, and seismic performance in beams, columns, and bridges, exemplified by long-term durability in projects like Switzerland’s Ibach Bridge. Emerging innovations include nanotechnology-enhanced adhesives to mitigate debonding, machine learning models for predictive structural analysis, and sustainable bio-based FRPs derived from renewable resources. However, challenges persist in interfacial durability, fire resistance, and standardized design protocols, particularly under environmental stressors or elevated temperatures. While FRP reduces lifecycle emissions and energy consumption compared to steel, economic viability and long-term performance in extreme conditions require further validation. Future research must prioritize fire-resistant formulations, predictive aging models, and interdisciplinary collaboration to optimize FRP’s role in sustainable, resilient infrastructure. This review synthesizes advancements and unresolved gaps, guiding practical implementation and fostering FRP’s potential in modern structural engineering.

Keywords:

Fiber-reinforced polymer, Structural strengthening, Nano-adhesives, machine learning, Bio-composites

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