Chloride Diffusivity, Fatigue Life, and Service Life Analysis of RC Beams under Chloride Exposure
Bibliographic record
Abstract
This study investigates the combined actions of flexural fatigue loading and chloride exposure by an experimental examination of the initial fatigue loading cycles (0.2, 0.4, 0.8, and 1.2 million), chloride exposure duration (0, 3, and 6 months), and modeling estimating service life. The results show the following: (1) at the initial fatigue loading cycles of 0.4, 0.8, and 1.2 million, (a) the chloride diffusivity of tensile concrete is similar, which are greater than the specimens initially fatigue loaded with 0.2 million cycles; (b) the chloride diffusivity of compressive concrete increases as the initial fatigue loading cycles increase; and (c) specimens present similar values of fatigue life and service life, which are shorter than the specimens initially fatigue loaded with 0.2 million cycles. (2) As the chloride exposure duration increases from 3 to 6 months, (a) chloride contents of tensile concrete increases more than that of compressive concrete, but both diffusion coefficients decrease; and (b) the fatigue life decreases by ~25%–75% and service life decreases by ~28%–55%. (3) There is an exponential correlation between the fatigue life and service life of beams.
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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 | 0.001 |
| 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".