Caractérisation du comportement post-pic en compression du béton armé et non armé, et extension au béton renforcé de fibres
Bibliographic record
Abstract
RESUME Le modele constitutif de beton EPM3D (Endommagement Progressif Multiaxial en 3 Dimensions) est developpe a l’Ecole Polytechnique de Montreal depuis 1990. Bouzaiene et Massicotte (1995) ont choisi l’approche hypoelastique avec le concept de deformation equivalente et la mise en place d’un parametre d’endommagement scalaire pour representer la microfissuration du beton en compression pre-pic. Le comportement post-pic adoucissant, en traction et en compression, est base sur le concept de conservation de l’energie de rupture. Dans le contexte des elements finis, cela requiert la determination d'un limiteur de localisation des deformations base sur un module d’adoucissement dependant de la taille de l’element du maillage. La formulation du modele EPM3D dans le cas de la compression post-pic devait etre revisee. Les problemes vis-a-vis de la dependance de la taille du maillage et l’absence de la prise en compte de l’effet du confinement etaient les points les plus importants a ameliorer avec comme but principal la modelisation du comportement a la rupture de poteaux en beton arme.----------ABSTRACT Since 1990, constitutive concrete model EPM3D (Multiaxial Progressive Damage in 3 Dimensions) has been developed at Polytechnique Montreal. Bouzaiene and Massicotte (1995) choose the hypoelastic approach with the concept of equivalent deformation and the implementation of a scalar damage parameter to represent the microcracking of concrete in pre-peak compression. The post-peak softening behaviour, in tension and in compression, is based on the concept of conservation of the fracture energy. In the finite elements context, it requires defining a localisation limiter acting on the softening modulus depending on the element size. The formulation of EPM3D model in the case of the post-peak compression required revisions. Mesh-dependence problems and the absence of the consideration of the confinement effect were the most important points to improve, with as main goal the modelling of the fracture of the reinforced concrete columns.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".