Performance of GFRP-Reinforced Concrete Circular Short Columns under Concentric, Eccentric, and Flexural Loads
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Bibliographic record
Abstract
This paper presents test results of seven large-scale circular concrete columns reinforced with either steel or glass fiber-reinforced polymer (GFRP) reinforcement. The columns measured 355 mm in diameter and 1,750 mm in length and were tested to failure under concentric, eccentric, or four-point bending configuration. Test parameters included the reinforcement type (GFRP and steel), the GFRP spiral pitch (50 and 85 mm), and varying ratios of eccentricity-to-column diameter (e/D = 0, 0.085, 0.17, and 0.34). The obtained axial capacity of the GFRP-reinforced concrete (RC) column was approximately 17% less than that of the steel-RC counterpart. However, for e/D = 0.085, the GFRP-RC column with a lesser spiral pitch exhibited approximately 10% more axial capacity than the column with a larger pitch. As the e/D ratio increases from 0 to 0.34 the axial capacity reduced by 32%, 39%, and 70% from the axial capacity of the concentric column. A “knee”-shaped interaction diagram for circular GFRP-RC columns was developed and compared with the predictions of available codes and guidelines for GFRP-RC structures.
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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 | 0.000 | 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) | 0.000 | 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