Water/ice loads and scour at Canadian bridges in a changing climate: state of practice review
Notice bibliographique
Résumé
The federal government, through Infrastructure Canada (INFC), has established the Climate Resilient Buildings and Core Public Infrastructure (CR-B&CPI) Project led by the National Research Council (NRC). A key project objective is to develop new and updated codes, guides and standards to support the design and rehabilitation of buildings and infrastructure to achieve improved climate resilience. To support meeting this objective, NRC’s Ocean, Coastal and River Engineering (OCRE) Research Center reviewed the current state of practice in Canada and internationally for evaluating water loads, scour and ice action, and related climate change impacts, on bridges and overpasses. The objectives of the initial literature review were to: -Identify and review recent cases of bridge damage/failure due to water loads, scour or ice loads in Canada and internationally; -Review the evolution, and current status, of methods and approaches to evaluating water loads, scour and ice action for new bridges presented in recent research publications, codes and standards; -Review recent research on approaches to incorporating climate change impacts (and associated changes in the frequency and intensity of extreme weather events) in methods of evaluating water loads, scour and ice action for new bridges; -Identify and summarize possible adaptation strategies and design approaches or practices currently in use to mitigate ice loads, water loads and scour at bridges in Canada and internationally. Historical failures in Canada and elsewhere highlight the risks posed by water loads, scour and ice effects to bridges, with more than half of bridge failures in North America attributed to floods and hydraulic factors; particularly scour. River ice is a particularly relevant hazard for Canadian bridges and associated structural components, with most rivers having seasonal ice cover. Estimates of annual average damages in Canada due to ice jams exceed $100 million. High-profile bridge collapses and damaging events have motivated much of the research forming the current basis for assessing water loads, scour and ice action on bridges. The risks associated with climate change, in terms of the increasing exposure and vulnerability of bridges and overpasses to water and ice hazards, represent growing concerns for Canadian infrastructure owners. A review of provisions in the Canadian Highway Bridge Design Code (CHBDC) for assessing water loads, scour, and ice action – and comparisons to various other standards, codes and guidelines in use in Canada and internationally – identified potential opportunities for improvements in future design guidance. These include opportunities to re-evaluate or re-consider some design aspects and approaches to load assessment for bridges as described below:
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 | 0,012 | 0,003 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,010 |
| Science ouverte | 0,002 | 0,003 |
| 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 ».