Effect of relative stiffness on moment redistribution in reinforced high-strength concrete beams
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Bibliographic record
Abstract
Moment redistribution in continuous concrete beams is primarily a structural aspect of behaviour, since it is a consequence of structural redundancy. However, the current design codes do not take this structural characteristic into consideration and therefore may not be reasonable when predicting the permissible moment redistribution. In this paper, moment redistribution in reinforced high-strength concrete (HSC) beams is analysed, focusing on the effect of relative stiffness represented by the structure-related parameter ρ s2 /ρ s1 (where ρ s1 and ρ s2 are the tensile steel ratios over positive and negative moment regions, respectively). A numerical evaluation was conducted on two-span continuous beams made of HSC having a cylinder compressive strength of 90 MPa. A wide range of ρ s2 /ρ s1 was produced by varying either ρ s1 or ρ s2 from 0·81% to 6·06%. The results show that the ρ s2 /ρ s1 ratio is a critical parameter influencing the global moment redistribution behaviour. Modifications to the Canadian Standards Association and American Concrete Institute equations are proposed for calculating the moment redistribution at the ultimate state. By introducing the parameter ρ s2 /ρ s1 , the proposed modified equations are shown to have an excellent fit to the actual redistribution values.
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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 | 0.002 | 0.002 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| 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 it