Article Dans Une Revue Structures Année : 2025

Flexural behavior of RC beams strengthened with Fe-based SMA using different types of anchorage: Experimental and analytical study

Résumé

Flexural strengthening of reinforced concrete beams using Iron-based Shape Memory Alloys (Fe-SMA) has been applied in the last decade in many studies and on-site applications. The efficiency of load transmission between Fe-SMA and concrete depends on anchorage during prestressing and loading. Near Surface Mounted (NSM) and Externally Bonded (EB) techniques are the most common methods of anchoring Fe-SMA rebars to the concrete in mortar. However, few studies have focused on anchoring techniques for the flexural strengthening of RC beams. To address this issue, six real-scale RC beams were reinforced with Fe-SMA rebars. The main parameters were anchorage length, reinforcing ratio, and anchorage types. The beams were tested on a four-point bending bench under monotonic loading. Load-carrying capacity, crack propagation, failure modes, strain analysis, prestressing losses, and anchorage behavior were investigated in this study. Strengthened beams showed a significant improvement in load-carrying capacity, ductility, and crack behavior. In addition, the performance of the different bonding techniques and the prestressing losses was assessed. Using an analytical model for ultimate moment prediction and prestress estimation gave satisfactory results.

Fichier non déposé

Dates et versions

hal-05320485 , version 1 (16-12-2025)

Identifiants

Citer

Léonard Axus, Firas Al Mahmoud, Charlotte Mercier, Abdelouahab Khelil, Tarak Ben Zineb. Flexural behavior of RC beams strengthened with Fe-based SMA using different types of anchorage: Experimental and analytical study. Structures, 2025, 81, pp.110420. ⟨10.1016/j.istruc.2025.110420⟩. ⟨hal-05320485⟩
109 Consultations
0 Téléchargements

Altmetric

Partager

  • More