Behaviour of bolted lap joints in above-ground liquid-filled steel cylindrical tanks
Why this work is in the frame
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Bibliographic record
Abstract
Leakage is the main concern in steel bolted liquid tanks and past experience has indicated serviceability problems due to leakage, mainly from the joint locations, even in situations where the tank has only been subjected to an internal hydrostatic pressure. In this study, the performance of this type of construction was investigated using a detailed finite element (FE) analysis technique. Moreover, the validity of the American Water Works Association design practice in terms of the safe design of this type of structure at a wide range of service loads is evaluated through a parametric study. The FE analysis was performed in two stages using shell and solid elements in a three-dimensional ANSYS environment including the effect of geometric nonlinearity. The proposed FE model could estimating the behaviors such as capacity curve, yield/failure pattern, and the occurrence of ovalling and curling in bolted connections. In addition, the FE results were compared with experimental ones and found to be generally in good agreement. This study shows that a bolt arrangement chosen by design can efficiently improve the joint performance. Further, the use of a limited deformation criterion in the leak-resistant design of bolted lap joints in steel liquid containers is recommended.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 it