Development of Replaceable Cast Steel Links for Eccentrically Braced Frames
Bibliographic record
Abstract
Replaceable links for eccentrically braced steel frames (EBFs) decouple the yielding links from the floor beams to facilitate rapid repair or replacement after a seismic event. Replaceable links that are composed of rolled or built-up steel sections are, however, susceptible to the same failure modes as links in conventional EBFs. These failure modes include fracture in the base metal or welds, local buckling, and lateral-torsional buckling, all of which limit the ductility of the link and consequently, the overall ductility of the frame. An extensive numerical analysis study was completed to develop replaceable cast steel link concepts, with practical connection details, that combine the advantages of replaceable links with the geometric freedom and material properties inherent to castings. Results indicate that the unique geometry of the proposed concepts achieves a larger rotation capacity and longer low-cycle fatigue life by evenly distributing flexural yielding over the entire length of the link and minimizing stress concentrations. The replaceable cast steel links have the potential to significantly improve the performance, reliability, robustness, and resilience of EBFs.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".