Strength of laps and anchorages of plain surface bars
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Although plain round or square section reinforcement is no longer used in new construction, there are many older structures still in service built with such bars. As a consequence of the increasing need for assessment of existing construction, there is a continuing need for information on their performance. Research into plain surface bars essentially ceased when ribbed bars became the norm, and plain bars have consequently been bypassed in the developments in the understanding of bond since 1960. An analysis of test data on bond of plain surface bars is presented, and an empirical expression for bond resistance is derived, which parallels that for ribbed bars in the fib Model Code 2010. The analysis finds various parameters that show marked differences in their influence on the bond resistance of ribbed and plain bars. In particular, the strong influence of cover ratio for plain bars observed in the test data was unexpected. A comparison with the provisions of the fib Model Code 90 demonstrates that, in some situations, the margin of safety against failure of straight plain bar anchorages may be too low.
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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