Shear Strengthening of Single Web Prestressed Hollow Core Slabs Using Externally Bonded FRP Sheets
Bibliographic record
Abstract
Precast, prestressed hollow core (PHC) slabs are among the most common load bearing concrete elements in the world. They are widely used in floors and roofs of office, residential, commercial and industrial buildings. As no shear reinforcement can be provided due to fabrication restraint, the concrete shear strength is the only source of PHC slab shear capacity. However, in some design situations, typically when large concentrated or line loads are present, shear capacity of PHC slabs could be exceeded. Therefore, developing an efficient technique to strengthen shear capacity of PHC slabs is essential. The objective of this research project is to explore an innovative application of Fiber-Reinforced Polymer (FRP) composite sheets to strengthening web-shear capacity of PHC slabs by installing the sheets along the internal perimeter of the slab voids. As the first phase of exploring the feasibility and effectiveness of this new technique, experimental and finite element study has been carried out on full scale single web hollow core slabs with carbon FRP sheets bonded on the full perimeter of voids on both sides of the specimen. Several parameters including the width and number of FRP sheets have been investigated. Test results showed the effectiveness of this novel shear strengthening technique.
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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 | 0.000 | 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 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".