Enhancing performance of beam-column joints in reinforced concrete structures using carbon fiber-reinforced polymers (CFRP): A novel review
Mohammed Sarhan Maseer, Abdulkhalik J. Abdulridha
Abstract
The performance and longevity of beam-column joints in reinforced concrete (RC) structures are crucial for ensuring structural stability and safety under various loading conditions. This study provides a comprehensive evaluation of CFRP-strengthened beam-column joints, incorporating insights into load-deflection behavior, the effects of major investigated parameters, and comparisons with existing research. Special emphasis is placed on hybrid rehabilitation strategies, such as combining epoxy repair with CFRP laminates and concrete jackets, which have demonstrated significant improvements in joint strength , stiffness, and energy absorption capacity . The study also explores the role of lightweight expanded clay aggregate (LECA) in reducing structural self-weight while enhancing impact resistance and energy dissipation . A critical review of ultimate load capacity, stiffness variations, and energy absorption in pre- and post-cracking stages reveals that CFRP and hybrid reinforcement systems effectively optimize structural performance, though environmental exposure and excessive reinforcement layering may influence long-term durability. Comparative analysis with existing studies highlights both aligned trends and significant variations, particularly in post-cracking stiffness retention and failure mechanisms. Equally, the study denotes the emerging role of AI-driven computational modeling and advanced finite element analysis in predicting joint behavior and optimizing design efficiency. Despite these advancements, hurdles remain in CFRP durability under harsh environmental conditions and the need for eco-friendly, sustainable strengthening materials. By handling these gaps, this research contributes to the development of more resilient, adaptable, and sustainable structural systems capable of withstanding evolving load and environmental demands. These findings offer new insights into enhancing reinforced concrete joint performance, paving the way for safer, more efficient, and long-lasting structural designs.