Thin-Walled, Cold-Formed, Steel-Welded Tube Design in a Long Span Dome
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Bibliographic record
Abstract
Experiments are performed to validate the American Iron and Steel Institute's Direct Strength Method (DSM) for cold-formed steel design applied to a unique, thin-walled, 3-radius, cold-formed steel oval tube. The tube segments make up a structural system for long span domes with surface areas over 20,000 m2. While it is expected that the dome design will be governed by overall global buckling under dead load, the compressive strength of the individual tubes experiencing local buckling is also checked. Strength prediction methods are limited for thin-walled steel tubes, especially for non-rectangular cross-sections, leaving engineers with few validated approaches for predicting axial capacity including local buckling. Stub column experiments are conducted to evaluate local buckling behavior and tested capacities are compared to DSM predictions employing finite strip elastic buckling analysis. It is confirmed with elastic buckling studies and the experiments that local buckling tendencies are reduced with radial curvature.
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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) | 0.001 | 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 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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