Numerical Modelling of Shear Crack Angles in Frp Shear-Strengthened Reinforced Concrete Beams
Bibliographic record
Abstract
SummaryThe shear crack angle is a key parameter in the calculation of the fibre-reinforced polymer (FRP) contribution to the shear capacity of a shear-strengthened reinforced concrete beam. In this study, a new approach is developed to estimate the shear crack angles for such a beam. The approach is based on the FRP/concrete interface response. A non-linear finite element model was developed to simulate the behaviour of six beams grouped in three sets according to their dimensions. One unstrengthened beam of each set was used as a benchmark and its behaviour was compared to that of a beam strengthened with a U-wrap scheme. It was found that the numerical model is able to successfully simulate the behaviour of the shear-strengthened beams. The numerical predictions compare very well with previously published experimental data in terms of load-deflection relationships and carbon FRP (CFRP) axial strain profiles along the sheet length. The analysis of the slip profiles along the CFRP strip is helpful to understand the bond behaviour between the concrete and CFRP strips. The interfacial slip profiles are used to predict the shear crack angle along the shear span, and these predictions agree very well with the experimental measurements. The numerical results give failure modes that are identical to those obtained experimentally.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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".