Evaluation of Cracks in a Spliced, Prestressed Concrete I-Girder Bridge
Bibliographic record
Abstract
The purpose of the investigation reported in this paper was to identify the main causes of cracking that occurred in the Cross Florida Barge Canal Bridge, a three-span, continuous, spliced I-girder bridge that comprises spans of 77.7–86.9–77.7 m (255–285–225 ft) located in Citrus County, Florida. This paper briefly describes the bridge and the cracking. It then presents analytical models. Analytical results showed that the maximum vertical tensile force within a girder end zone from longitudinal prestressing strands was nearly 8% of the total prestressing force. The force was significantly higher than that prescribed by AASHTO specifications to determine the quantity of vertical reinforcement required at the ends of pretensioned members. Finally, the paper discusses some recommendations for end zone detailing. The results could help bridge designers provide better bridge detailing and further mitigate cracking in prestressed, spliced I-girders.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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".