Finite-Element Bond-Slip Model for Concrete Columns under Cyclic Loads
Bibliographic record
Abstract
The hysteretic behavior of reinforced concrete structures depends in large measure on the transfer mechanism between reinforcing steel and concrete through bond and the resulting slip. This paper presents a finite-element model developed to investigate the response of reinforced concrete columns subjected to cyclic loading, considering in an explicit way the relative displacement at the interface. The novel aspect of the model is its capability of modeling three-dimensional effects as concrete confinement, the softening response of concrete, and to take into account the gradual deterioration of the bond between reinforcing bars and concrete. Numerical results are compared to experimental results on rectangular bridge columns with lapped starter bars subjected to cyclic loading. The numerical model reproduces the physical phenomena observed experimentally, as the gradual stress transfer from one bar to the other. The numerical results show the effect of damage in concrete on the steel stress distribution, as long as the coupled effect of damage in concrete and bond-slip constitutive law on the general behavior of the structural element.
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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 | 0.000 |
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".