Pull-out tests of a new hooked steel-GFRP composite connector in precast concrete sandwich panels
Bibliographic record
Abstract
A new hooked steel-GFRP composite connector was proposed for precast concrete sandwich panels. The new connector consisted of a steel core and glass fiber-reinforced polymer (GFRP) as outer covering layers processed by injection molding machines. It was intended to connect the inner and outside layers of precast concrete sandwich panels with high structural performance, low thermal conductivity and ease of installation. To investigate the anchoring capacity of the new connector in concrete, pull-out tests were carried out on total 9 test specimens. Experimental results were analysed including pull-out strength, failure pattern, load-slip curve and load-strain curve etc. Results show that all the test specimens fail with the pattern of pulling out of concrete cone. Slippages between the connectors and concrete remain negative when the specimens were damaged. Hook of the connector linking the intersection of reinforcing bars improve the pull-out capacity significantly. The pulling-out capacity of the new connectors increase with the increment of concrete strength grade; and the average pulling-out capacity of the connectors become more than 5 times pulling-out load required by the Chinese code.
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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 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 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".