Concrete contribution to the shear resistance of FRP-reinforced concrete beams
Notice bibliographique
Résumé
Corrosion of steel reinforcement in concrete structures causes deterioration of concrete, resulting in costly maintenance and repair. Many steel-reinforced concrete structures exposed to deicing salts and marine environments require extensive and expensive maintenance. Recently, the use of fibre-reinforced polymers (FRP) as an alternative reinforcing material in reinforced concrete structures has emerged as an innovative solution to the corrosion problem. However, due to the difference in mechanical properties between steel and FRP reinforcements, the shear strength of concrete members reinforced with FRP longitudinal reinforcement may differ from that of members reinforced with steel. An experimental program including two phases is described. The experimental program was conducted at the University of Sherbrooke to investigate the effect of using FRP bars as longitudinal reinforcement on the shear strength and behaviour of concrete beams without web reinforcement. The first phase included 15 large-scale concrete slender beams reinforced with glass FRP, carbon FRP, or conventional steel bars. Nine beams were constructed using normal-strength concrete, whereas six beams were constructed using high-strength concrete. The test variables were the reinforcement ratio and the modulus of elasticity of the reinforcing bars as well as the concrete compressive strength. The second experimental phase included 12 large-scale concrete deep beams reinforced with glass FRP, carbon FRP, or conventional steel bars. The test beams of this phase were constructed using normal-strength concrete and the test parameters were the reinforcement ratio and the modulus of elasticity of the reinforcing bars as well as the shear span-to-depth ratio. The influence of the considered variables on the shear strength and behaviour of the tested beams in the two phases is presented. An analytical investigation to examine the validity of the available design provisions of concrete contribution to shear strength for members longitudinally reinforced with FRP bars is reported. For this purpose, the shear strengths of the tested beams are analyzed using the shear design provisions of the different available codes, manuals, and design guidelines. The results of the analysis are compared with the experimental values. Based on the findings of this investigation, a proposed shear design equation is presented. The proposed equation is verified against experimental shear strengths of 107 specimens tested to date, including the specimens in this investigation. In addition, the proposed equation is compared to the major design provisions using the available test data to further evaluate its reliability.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».