Reply to the discussion by Bakht et al. on "An experimental investigation of steel-free deck slabs"
Notice bibliographique
Résumé
The authors are now in complete agreement with the discussers that the longitudinal crack of the steel-free concrete slabs is not a danger to the ultimate strength of these slabs. After the original experiment, we have since turned our focus to the fundamental behaviour of the steel-free concrete members, which is thought to be essential before further developing the system. One part of this research dealt with steel-free slab strips, which act in bending and is yet unpublished. Another part tested the change of failure mode of steel-free beam-like members and will be published soon (Hassan et al. 2004). The authors came to believe that the behaviour of steel-free concrete members after cracking is better simulated by using models of masonry structures. Arching action would completely dominate after a steel-free concrete member had substantially cracked (in terms of crack width not crack numbers) and therefore turned into separate blocks. The discussers stated this fact when they mentioned that all steel-free slabs had developed full length longitudinal cracks. Consequently, the new system of concrete blocks restrained by the straps and the girders could be considered as any well-restrained masonry arch. This approach would help allay the concerns and fears of many engineers that the longitudinal crack is a menace to the strength of the system. Heyman (1969) in his fundamental and pioneering studies of masonry arches and vaults showed, for example, that cracking state in a masonry arch, similar to the one present in the steel-free slab after appearance of a longitudinal crack, is completely safe and might transfer the structure to a better shape to resist applied loading. Heyman (1969) also proved that a perfectly flat arch (a slab) has an infinite geometrical factor of safety, meaning that the structure failure would be initiated only by material crushing (punching in the case of slabs) or by failure of the restraining system. In brief, the fear of the longitudinal crack in the steel-free slab is due mainly to the belief that this system is merely a variation on the conventional slab. When a consideration such as the one mentioned above is introduced to explain the behaviour of the steel-free concrete slab after cracking, better understanding of the longitudinal crack would be expected.
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 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 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 ».