Full-Scale Tests on Shear Connections of Composite Beams Under a Column Removal Scenario
Bibliographic record
Abstract
In this research, the progressive collapse behaviour of a shear connection of a composite beam has been investigated experimentally. Steel shear/simple connections are widely used in composite gravity framing systems and their behaviour under conventional loading is well understood. However, their response and robustness under the column removal scenario is still largely unknown. While the slab itself can participate in maintaining the integrity of the overall floor system, its presence also amplifies the demand on the steel connections after experiencing initial flexural action. As the column pulls down progressively, which results in a large vertical deflection, the shear connection reaches its capacity under tension-dominant action. The contribution of the concrete slab to the steel connection demands plays an important role in determining the failure mode, load carrying capacity, and ductility of the connections. The main objective of the experimental program is to study the behaviour of steel shear connections in the presence of a concrete slab under a column removal scenario. The test results show the performance of the connection in terms of rotational ductility and ultimate load capacity.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 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".