Enhancing buckling capacity of slender s-section steel columns around strong axis using bonded carbon fibre plates
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Bibliographic record
Abstract
This paper investigates a strengthening technique of slender S-section steel columns against global buckling about their strong axes. Carbon fibre-reinforced polymer plates of various Young’s moduli, ranging from 168 to 430 GPa, were adhesively bonded to the steel flanges. The number of carbon fibre-reinforced polymer layers was varied to produce reinforcement ratios of 11–34%. The study comprised eight 2.6 m long pin-ended columns with a slenderness ratio of 83, including five strengthened with carbon fibre-reinforced polymer. The out-of-straightness imperfection of the columns ranged from length (L)/29,000 to L/1600. It was shown that the increase in strength ranged from 15% for the smallest out-of-straightness to 25% for the largest. Increasing reinforcement ratio of the 168 GPa modulus carbon fibre-reinforced polymer from 11 to 34% increased strength from 5 to 15%. Although a higher modulus carbon fibre-reinforced polymer would generally be favoured for achieving higher gains in buckling strength according to Euler’s buckling theory, this study showed that failure strain of such carbon fibre-reinforced polymer could be a critical limiting factor. It is important that global buckling, and hence the peak load, is achieved before carbon fibre-reinforced polymer crushing.
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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)
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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