Influence of Brace Slenderness on the Fracture Life of Rectangular Tubular Steel Bracing Members Subjected to Seismic Inelastic Loading
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Bibliographic record
Abstract
Axial compressive strains that develop in rectangular steel tube braces subjected to cyclic inelastic loading can lead to local buckling and brace fracture. In this study, the influence of the brace effective slenderness on this strain demand is examined as an attempt to assess the effect of brace slenderness on brace fracture. Past test data indicating an impact of brace slenderness on brace fracture is first reviewed. Brace axial deformations at onset of buckling and at first yielding in compression are evaluated using elastic buckling theory. Finite element analysis of bracing members exhibiting different effective slenderness ratios is carried out to evaluate the strain demand after inelastic buckling has occurred and plastic hinging has formed. The strain demand prior to brace buckling and plastic hinging is small and has negligible effect on brace fracture. Compressive strains that develop after brace buckling has occurred and plastic hinging has formed generally decrease as the brace effective slenderness ratio is increased.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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