Effect of Reinforcement Corrosion on Axial and Flexural Performance of R.C. Columns
Bibliographic record
Abstract
Limited research is available on the axial and flexural performance of statically loaded reinforced concrete columns subject to medium and high levels of corrosion. A combined experimental and analytical investigation was developed to evaluate the residual bearing capacity and the post-peak response of corroded columns at different reinforcement corrosion levels and patterns. The analytical approach was established from sectional analysis and numerical analyses of ten reinforced concrete columns that were experimentally tested under quasi-static concentric and eccentric loads. Eight of the columns were subjected to accelerated reinforcement corrosion for 137-days. The mid-section of the columns was subjected to three different patterns of reinforcement corrosion, targeting the dominating reinforcement contributing to peak bearing capacity depending on eccentricity level. Four columns loaded concentrically and eccentrically were corroded at the transverse reinforcement, two columns loaded eccentrically were corroded along the longitudinal reinforcement only, and two columns loaded concentrically were corroded along the transverse and longitudinal reinforcements. Three dimensional finite element analyses were conducted using Diana finite element software to investigate more corrosion scenarios beyond those experimentally tested. The presented approach accounts for material deteriorations (strength, cross-sectional area, bond, and confinement effects) using constitutive models from the literature and incorporates data from the experimental testing. The analytical estimation compared well with experimental and numerical results. The outcome of this investigation emphasizes the importance of incorporating degradations models into evaluation procedures of corroded columns. Results indicate a significant reduction in peak residual strength and ductility at high levels of reinforcement corrosion. Also, local buckling of the longitudinal reinforcement is attributed to loss of core confinement due to tie fracture.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".