Wind-tunnel investigations of an inclined stay cable with a helical fillet
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Bibliographic record
Abstract
Cable-stayed bridges have been recognized as the most efficient and cost effective structural form for medium-to-long-span bridges over the past several decades. With their widespread use, cases of serviceability problems associated \nwith large amplitude vibration of stay cables have been reported. Stay cables are laterally flexible structural members \nwith very low inherent damping and thus are highly susceptible to environmental conditions such as wind and \nrain/wind combination. \nRecognition of these problems has led to the incorporation of different types of mitigation measures on many cable-stayed bridges around the world. These measures include surface modifications, cable crossties, and external dampers. \nModification of cable surfaces has been widely accepted as a means to mitigate rain/wind vibrations. Recent studies \nhave firmly established the formation of a water rivulet along the upper side of the stay and its interaction with wind \nflow as the main cause of rain/wind vibrations. Appropriate modifications to exterior cable surfaces effectively disrupts \nthe formation of a water rivulet. \nThe objective of this study is to supplement the existing knowledge base on some of the outstanding issues of stay \ncable vibrations and to develop technical recommendations that may be incorporated into design guidelines. \nSpecifically, this project focused on the wind-cable interaction, with particular interest in details of the air flow and \nflow field close to the cable as well as forces on the cable surface. A helical fillet was attached to an existing cable \nmodel to evaluate the influence of this common mitigation feature on dynamic behavior. The cable inclination angle \nwas varied during testing to represent field orientations, and the model was rotated on its longitudinal axis to assess the \ninfluence of high-density polyethylene roundness. Tests were conducted at various levels of damping, with and without \nthe fillet, and in turbulent as well as smooth flow conditions. \n
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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 it