Seismic Resistance of Wood Shear Walls with Large OSB Panels
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Bibliographic record
Abstract
Results are presented from studies on the seismic resistance of wood shear walls sheathed with large (2.4 × 2.4 m) and standard (1.2 × 2.4 m) size oriented strand board (OSB) panels. Comparisons were made among twelve 2.4 × 2.4 m walls tested under quasi-static monotonic and cyclic, as well as dynamic, loads. In push-over tests, all walls reached a drift of approximately 2.5% at maximum load. A 26% increase in shear capacity was achieved using large panels. The nails that would be at internal seams in walls with standard panels were redistributed around the exterior edges of some large panel walls. They also showed a 104% increase in shear capacity and a 30% increase in initial stiffness. These walls performed significantly better when tested dynamically, using the east-west motion recorded at Joshua Tree Station during the 1992 Landers, Calif., earthquake. Their maximum drift was reduced by approximately 25% over standard walls. Damage incurred during dynamic tests consisted mainly of nail pullout and tear out. Renailing at these locations is simple and can restore the wall to a satisfactory performance level.
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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