Analysis of concrete beams prestressed and post-tensioned with carbon fiber reinforced polymer (CFRP) bars.
Bibliographic record
Abstract
Bars made of composite fiber reinforced polymers (FRP) are becoming more popular in prestressing concrete structures. A full-scale test was undertaken at the Construction Technology Laboratories for a double-tee beam prestressed internally and externally with carbon fibers. An analysis has been conducted to evaluate the behaviour and the ultimate strength of the beam by using the classical analytical equations to examine their correlation with the structural test results. The stresses and deflections obtained from the analysis showed good comparison with the test results. An iterative design procedure is also proposed to estimate the ultimate load carrying capacity of the beam taking into consideration the variation of the stress that occurs in the unbonded tendons during the different stages of loading. A computer program was developed to cover the iterative procedure of the analysis and predicts the ultimate load carrying capacity. The analytical process for evaluating the ultimate moment is based on the deflected shape of the double-tee beam. (Abstract shortened by UMI.) Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2002 .A123. Source: Masters Abstracts International, Volume: 45-01, page: 0385. Thesis (M.A.Sc.)--University of Windsor (Canada), 2002.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".