03 Feb New publication in the International Journal of Fatigue
A new scientific article entitled “Fatigue behavior of externally bonded and hybrid-bonded carbon fiber reinforced polymer–to–concrete joints” has been published in the International Journal of Fatigue.
The paper was written by Mehdi Aghabagloo, in collaboration with researchers from AMADE -Laura Carreras and Marta Baerna- and the University of Minho (Portugal), including Professor José Sena-Cruz. This joint effort combines experimental investigation and analytical modeling to advance the understanding of fatigue performance in strengthened concrete structures.
Research Overview
The study focuses on the fatigue behavior of carbon fiber reinforced polymer (CFRP)–to–concrete bonded joints, comparing two strengthening techniques:
– Externally Bonded Reinforcement (EBR)
– Hybrid-Bonded (HB) systems
An extensive experimental campaign was carried out using direct pull-out tests under cyclic fatigue loading. CFRP laminates were tested at different maximum cyclic load levels while maintaining a constant load ratio, allowing a detailed observation of fatigue-induced damage progression and debonding mechanisms.
In parallel, the research proposes an analytical model based on Paris’ law, adapted to describe and predict the growth of debonding under fatigue loading conditions.
Key Findings
-Both EBR and hybrid-bonded CFRP-to-concrete joints exhibit progressive debonding under cyclic loading, strongly influenced by the applied maximum load level.
-The proposed Paris’ law–based analytical model shows good agreement with experimental results and provides a useful predictive tool for fatigue debonding growth.
-The combined experimental–analytical approach contributes to more reliable design and assessment of CFRP-strengthened concrete structures subjected to fatigue.
Publication Details
📘 International Journal of Fatigue
🔗 Full article available here
