The Effect of Orientation and Distribution on the Material and Structural Behaviour of Ultra-High-Performance Fibre-Reinforced Concrete
Bibliographic record
Abstract
This work continues research at the University of Toronto into a simple precast ribbed deck slab system using ultra-high-performance fibre-reinforced concrete (UHPFRC) for highway bridge overpasses. Two identical ribbed slab specimens are tested in the range of their serviceability and ultimate limit states and are tested to failure. These tests demonstrate that the proposed system is capable of supporting the required concentrated loads according to the Canadian Highway Bridge Design Code. Fibre properties including the distribution of fibres and their orientation are then examined in an effort to explain the behaviour of UHPFRC at the material and structural levels. In doing so, clear trends are identified between the fibre properties and the flexural tensile strength of UHPFRC. A general predictive equation for the tensile strength of UHPFRC is summarized and is then applied specifically for the current UHPFRC mix under study. Concrete and fibre properties as determined throughout the specimens are then related to the behaviour of the ribbed slab specimens.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 source (direct Gemma or distilled Codex), 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".