Comportement en flexion de joints en BFUB entre dalles préfabriquées dans l'axe des poutres
Bibliographic record
Abstract
RESUME Au Quebec, plusieurs ponts necessiteront une reparation ou un remplacement dans les prochaines annees car la vie utile de ces structures est atteinte. Cette quantite importante de travaux est tres dispendieuse pour la societe. Il est donc necessaire de trouver des alternatives moins couteuses. L'utilisation d'elements prefabriques en beton constitue une bonne option car cette methode est souvent plus economique que l'option d'une coulee en chantier due a la main-d’oeuvre et a la machinerie de chantier plus cher qu’en usine. De plus, l’element prefabrique fait en usine elimine les risques d’arret des travaux dus a la temperature exterieure tout en assurant une meilleure qualite. Cette recherche se concentre sur les dalles prefabriquees constituees de plusieurs sections, jointes par du beton fibre a ultra-haute performance (BFUP). Ce nouveau type de beton contient un pourcentage eleve de fibres d’acier qui permet de compenser la faible resistance en traction du beton conventionnel en plus de lui conferer une ductilite exceptionnelle en traction. Les dalles sont aussi constituees d’un beton avec fibres d’acier qui sont toutefois plus longues et en moins grande quantite que celles du BFUP.----------ABSTRACT In Quebec, there are many bridges which would need to be repaired or replaced in the near future. In fact, most of these structures have already achieved there lifespan. The massive construction costs needed to repair the bridges are a burden on society. Less expensive alternatives must be applied. The use of prefabricated concrete elements are usually economical compared to cast-in-place elements like girders, piles and decks because they necessitate less on site labor, which contributes to the majority of the costs. Moreover moving fabrication in factory eliminates the risk of stopping the construction because of the weather constraints and increases the quality of the elements. This research focusses on the deck which is installed on the girders of the bridge by sections. These sections are connected by joints made of ultra-high performance fibre reinforced concrete (UHPFRC). This new type of concrete contains a high percentage of steel fibres which eliminates the brittleness of concrete and allows developing an exceptional tensile ductility. The deck panels are also made of fibre reinforced concrete which contains longer steel fibres in lower quantity.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".