Influences of pinching and P-.TRIAGL. effects on seismic ductility demand and damage index
Bibliographic record
Abstract
Assessment of the influences of pinching and P-Δ effects on seismic ductility demand and Park-Ang seismic damage index of inelastic single-degree-of-freedom(SDOF) system is carried out.The hysteretic behaviour of the SDOF system is described using the Bouc-Wen model taking into account strength and stiffness degradations as well as pinching and P-Δ effects.Analysis results show that the P-Δ and the pinching effects influence the seismic ductility demand,while the effect induced by the vertical excitation is negligible.Probabilistic models for predicting the mean and coefficient of variation of seismic ductility demand considering the pinching and P-Δ effects are recommended based on the samples obtained from 69 California records.It is suggested that for short-period system,the seismic ductility demand can be modeled as either the Lognormal or the Frechet distribution,while for long-period system,the Frechet distribution is preferred.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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 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".