Dynamic Behavior of a Granular Medium Subjected to Resonant Column Tests: Application to Ottawa Sand
Bibliographic record
Abstract
Abstract This research is based on the results of 120 determinations of the shear modulus (G) of a saturated granular medium (20-40 Ottawa sand) for different conditions of relative density (Dr), effective consolidation pressure (σ’c), and level of torsional excitation (Te) obtained through the measurement of the resonant frequency (Fr) in resonant column equipment. The tests were performed with relative density values equal to 20, 40, 60, and 80 %; effective consolidation pressures of 50, 100, 150, 200, 250, and 300 kPa; and torsional excitations of 0.025, 0.05, 0.1, 0.2, and 0.4 V. The proposed experimental program is described in detail, in addition to the systematic process of analysis to properly study and interpret the results obtained for samples subjected to cyclic loading. In general, the results indicate that it is possible to establish very simple empirical functions of the resonant frequency as a function of the angular strain and of the effective consolidation pressure. It is concluded that is statistically significant to consider the shear modulus and the resonant frequency related by a constant value M for each type of soil. In this sense, a methodology is proposed herein to be able to obtain from a very small number of tests the variation trends of the shear modulus as a function of the angular strain for different effective consolidation pressures.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".