Bond Strength of Standard and High-Modulus GFRP Bars in High-Strength Concrete
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Bibliographic record
Abstract
The use of glass fiber–reinforced polymer (GFRP) bars in high-strength concrete (HSC) can solve durability problems associated with conventional steel reinforced concrete (such as premature deterioration due to corrosion) and increase the service life of structures. Experimental investigations were conducted to evaluate the bond characteristics of GFRP bars in HSC. Ninety six pullout specimens that had variable parameters, namely, bar diameter (15.9 mm and 19.1 mm), bar surface condition (sand coated), GFRP bar types (standard low modulus and high modulus), and embedded length (3, 5, 7, and 10 times bar diameter) were tested. The influence of each of these parameters is analyzed to understand interface bond between GFRP bar and HSC. Load-slip characteristics and failure modes of the pullout specimens are described. The performance of various codes in predicting bond stress of both low-modulus and high-modulus GFRP bars embedded in HSC is described based on experimental results.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it