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Statistical Analyses of Strength of Slender RC Columns

2001· article· en· W2040731645 on OpenAlex

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affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueJournal of Structural Engineering · 2001
Typearticle
Languageen
FieldEngineering
TopicStructural Behavior of Reinforced Concrete
Canadian institutionsWestern University
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsStructural engineeringEccentricity (behavior)Probabilistic logicCompressive strengthBucklingReinforced concreteTest dataStability (learning theory)Probabilistic analysis of algorithmsStatistical modelMoment (physics)MathematicsComputer scienceEngineeringStatisticsMaterials scienceComposite material

Abstract

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Probabilistic analyses of the modeling errors of several selected strength prediction models for slender reinforced concrete (RC) columns are carried out. The selected strength models include the moment magnifier methods that are recommended in the ACI and CSA design codes and the stability-based theoretical model. A relatively large amount of test data on slender RC columns is collected from the literature and the test results are compared with the ones obtained from different strength prediction models. Both normal- and high-strength concrete columns are included in this study. Probabilistic analyses of the modeling error include the use of pseudolikelihood estimation method. Analysis results suggest that the coefficient of variation of the modeling error for slender RC columns can be as high as 20%, which is considerably larger than those suggested and employed for reliability analysis in the literature. The results also suggest that the modeling error for slender RC columns depends on concrete compressive strength, the load eccentricity, and the slenderness ratio. However, the effect of the slenderness ratio on the modeling error is negligible. Sets of probabilistic models of the modeling errors by considering different strength models for slender RC columns are suggested.

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Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.366
Threshold uncertainty score0.768

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.019
GPT teacher head0.276
Teacher spread0.256 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it