Numerical linear elastic investigation of steel roof deck diaphragm behaviour accounting for the contribution of non-structural components
Notice bibliographique
Résumé
Dynamic analysis programs and empirical formulae are often used to compute the period of vibration of single-storey steel buildings. Recent ambient vibration tests of buildings in Quebec and British Columbia have shown that the predicted period of vibration is typically much longer than that measured. Software and empirical formulae do not usually take into account the stiffening effects of the non-structural components; this could be the source of the discrepancy between the results in the field and the results obtained by computational methods. This research project concentrates on the roof diaphragm system of single-storey steel buildings and the contribution of the non-structural components to diaphragm stiffness. It is believed that the non-structural components, roofing materials such as gypsum board and fibreboard, add to the overall stiffness of the system. A roofing system called AMCQ SBS-34 consisting of gypsum board, ISO insulation board and fibreboard, all hot bitumen adhered, was studied. The full roof system, as well as its individual components and connections, were first studied through laboratory testing. The flexural and shear stiffness of the fibreboard and gypsum panels, as well as the shear stiffness and equivalent flexural stiffness of the complete roof system and shear stiffness of the roofing connections were determined. Linear elastic finite element models, using the SAP2000 software, were developed to replicate the behaviour of bare sheet steel and clad diaphragm test specimens. The test based properties of the roofing components and connections were incorporated into the definition of the elements. The models were then calibrated based on the results of large-scale diaphragm tests by Yang. Once the elastic behaviour of the diaphragms had been matched, a parametric study was performed in order to assess the importance of the contribution of the roofing assembly relative to the roof deck panel thickness. It was shown that as the deck thickness increases, the relative contribution of the non-structural components decreases on a percentage basis, but does not become non-negligible. The increase in shear stiffness of the diaphragm ranges from 58.6% for the 0.76 mm deck panel to 4.7% for the 1.51 mm roof deck panel, dependent on the sidelap and deck-to-frame connection configuration.
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 ».