Unified Approach for Liveload Moments and Deflections in Orthotropic Bridge Deck Due to CHBDC Truckloading
Bibliographic record
Abstract
The current Canadian Highway Bridge Design Code includes design provisions to establish live load moment demands for reinforced concrete decks over longitudinal girders, orthotropic deck over longitudinal girders, and orthotropic deck over transverse beams. However, it only provides an equation for the factored applied moment on the deck as a function of the girder spacing, neglecting the effect of flexural and torsional rigidities of the deck. As a result, a parametric study was carried out in order to produce new empirical expressions for moment in bridge decks subjectedto truck wheel loading, takinginto account each of the three cases oforthotropy, namely: relatively torsionally stiff, flexurally soft decks, relatively uniformly thickness decks, and relatively torsionally soft, flexurally stiff decks. Bridge deck design can be treated in a unified manner across different deck types using the proposed formulations, accounting for longitudinal and transverse flexural rigidity of decks. The use of these methods can significantly simplify deck analysis and allow bridge engineers to compare different deck design alternatives.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".