Flexural failure modes of ribbed triangular UHPFRC plates: experimental and numerical investigation
Bibliographic record
Abstract
Thin UHPFRC plates stiffened by reinforced ribs represent a promising use of UHPFRC as demonstrated in some outstanding applications. Optimization of the ribs reinforcement and of the UHPFRC fibre ratio, which has significant economic and technical relevance, is critically related to guaranteeing ductile failure modes of such structures and components, including effects of the scatter of local material properties and post-cracking fibre contribution. A micromechanical model based on the fibre pull-out mechanism and explicitly accounting for fibre orientation and spatial dispersion has been developed and its ability to support the structural design of ribbed reinforced UHPFRC structures is under validation. To this aim, flexural tests on ribbed triangular UHPFRC plates have been carried out at IFSTTAR Structures Laboratory, with LafargeHolcim as a partner, in a joint project with Laval University. The fibre content and the preferential fibre orientation related to casting process were varied, as well as the loading configuration, so that the possible structural redundancy could be checked. The results of these tests are described and numerically analysed in relation to the material properties derived from both molded samples and specimens sawn from companion plates.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".