Mechanical grouting sleeve of rebars: experimental investigations
Bibliographic record
Abstract
To ensure the reliability of prefabricated concrete structures and reduce the cost of sleeve, a new type of mechanical grouting sleeve of rebars was designed. According to the specification of the rebar joint, monotonic axial tension test and cyclic load test of the new rebar sleeve were performed. The working mechanism and connection performance of sleeve were studied. The results show that the unidirectional tensile strength of the sleeve joint can meet the requirement of 1.1 times of the tensile strength of the rebar. The deformation of mechanical grouting meets the requirements of standard under cyclic load. The strength and deformation properties of the rebar joint meet the requirements of standard of JGJ107-2010 for I level joint when the grouting length is large. The working mechanism of the mechanical grouting sleeve is discussed, which provides a new design method for the connection of rebar with different diameters. The research results are of great significance for promoting the development of prefabricated concrete structures.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 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".