Efficiency of EB CFRP composites for flexural strengthening of continuous RC beams: A comparative study with NSM CFRP rods - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Structures Année : 2021

Efficiency of EB CFRP composites for flexural strengthening of continuous RC beams: A comparative study with NSM CFRP rods

Mohammad Abdallah
  • Fonction : Auteur correspondant
  • PersonId : 1284470

Connectez-vous pour contacter l'auteur
Firas Al-Mahmoud
Abdelouahab Khelil

Résumé

This paper presents an experimental study of the use of carbon fiber-reinforced polymer (CFRP) composites tostrengthen two-span reinforced concrete (RC) beams. Six large-scale beams were strengthened in hogging andsagging regions according to the external bonding (EB) technique and then statically tested to investigate theimpact of the CFRP position , CFRP form , CFRP layers , and weight of carbon fibers on the flexural performanceof continuous beams. The experimental results of the strengthened beams were carefully studied in terms of loadcarrying capacity, failure modes, cracking patterns, moment redistribution, and reinforcement strain andcompared with the results of an unstrengthened control beam. The efficiency of the EB technique in strengthening continuous RC beams was assessed through a comparative study with the near surface mounted (NSM) technique. For this purpose, another two beam specimens strengthened with NSM-CFRP bars were considered. Based on the experimental results, a general improvement in the flexural performance of strengthened beams was observed. By applying the EB-CFRP composites, the yield and ultimate load capacity could be improved up to 59.1% and 49.8% respectively. . The results also showed that increasing the carbon fiber weight was found to be effective in improving the strength capacity of beams and it may use as an alternative to multiple sheet layers… Comparisons regarding the global flexural performance allow confirming the higher efficiency of the NSM system in comparison to the EB one.
Fichier principal
Vignette du fichier
S2352012421007852.pdf (2.48 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03976004 , version 1 (16-10-2023)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Mohammad Abdallah, Firas Al-Mahmoud, Abdelouahab Khelil, Julien Mercier. Efficiency of EB CFRP composites for flexural strengthening of continuous RC beams: A comparative study with NSM CFRP rods. Structures, 2021, 34, pp.1567-1588. ⟨10.1016/j.istruc.2021.08.073⟩. ⟨hal-03976004⟩
15 Consultations
12 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More