Comportement des interfaces fragiles des ouvrages hydroélectriques
Bibliographic record
Abstract
In Quebec, the concrete dams over fifty years are systematically studied since the Saguenay earthquake (1988, 6.2 on the Richter scale) because they were not sized for such hazards. For calculation of the reliability codes for Hydro-Quebec structures, different parameters on the morphology of structure and the physical and mechanical parameters are needed. Among these, the shear strength of interfaces (concrete-concrete, concrete-rock, rock-rock) is particularly important because it determines the safety factor in large part. Moreover, it is commonly accepted that the roughness of the surfaces of rock discontinuities determines the mechanical behavior in shear. This study is divided into two parts: a study of taking samples from two dams of Hydro-Quebec and the conception of an artificial rock-concrete contact. Firstly, from shear tests realized under constant normal load, achieved on contacts from two dams, the principal component study of mechanical and roughness parameters was conducted to determine the parameters dominate (Z[subscript 2], Z[subscript 4], Extent).In addition, a field classification of discontinuities is proposed. The latter depends on various parameters such as the angularity of the surface, filling or oxidation of the surfaces of the discontinuity. Artificial rock-concrete contact has been studied in its entirety by various statistical and geostatistical methods in order to describe as precisely as possible its surface roughness. Once the last known, a map of coring with a 150 mm diameter core sampler has been decided. The collected areas are those with features of roughness, for example, a high angularity. Once the coring performed, samples were tested for shear resistance under a constant normal load It follows a study of mechanical and roughness parameter and an underline of scale effect.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 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".