Effect of Regular Perforation Patterns on Steel Plate Shear Wall Column Demands
Bibliographic record
Abstract
Several methods have been proposed to reduce the moment and axial force demands on the columns of steel plate shear walls. One such method is to reduce the strength of the infill plate by introducing a regular pattern of perforations in the form of circular holes. The decrease in shear strength of the system depends on the diameter of the holes and their centre-to-centre distance. It was found using a variety of finite element models that although introducing the perforations may reduce the lateral strength of the system, the total demand on the columns can in some cases actually increase. Also, the perforated system is sensitive to the pattern of holes selected in that a small change in the arrangement of the holes can have a significant effect on the moment demand on the columns. Moreover, the flexibility of the beam-to-column connections affects the column demands considerably and also influences the sensitivity of the column design forces to the pattern of holes selected. An appropriate design method is proposed and the suitability of this system is summarized.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".