A Liquefaction Triggering Surface for Ottawa F65 Sand: Cyclic DSS Results and PM4Sand Calibration
Bibliographic record
Abstract
Liquefaction triggering results from 48 cyclic direct simple shear (DSS) tests are presented for Ottawa F65 sand under constant volume and level ground conditions, at a vertical stress of 100 kPa. An analytical framework is presented to relate relative density (DR), cyclic stress ratio (CSR), and number of cycles to liquefaction (N) using a simple expression with three fitting parameters, which can provide improved interpretation of DSS test results. The expression can be rearranged to be in CSR versus N space, as is traditional when presenting DSS results, or in CSR versus DR space, as is conventional with case history data. The mean liquefaction triggering surface for Ottawa F65 sand is presented together with an estimate of the uncertainty associated with the full experimental dataset. The results are then used to obtain element-level calibrations of the constitutive model PM4Sand across the experimental parameter range that bound the uncertainty from cyclic DSS tests.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".