Dimensjonering og analyse av fiberarmert polymer som armeringsstenger i plattendekke
Bibliographic record
Abstract
Fiber reinforced polymer (FRP) is an advanced composite which offers high capacity in tensile\nstrength, low weight and excellent corrosion resistance. Rebars made from basalt-, glass- and carbon\nfibers are readily available in the marked, but the practical use in the construction industry is limited\nbecause of less knowledge and no codes or standardization. This thesis studies the use of FRP-rebars in lattice girder slabs to compare the effect the rebar has on longer spans compared to regular steel reinforced lattice girder slabs. Both non-tensioned and pre-tensioned alternative have been studied with a variable thickness and length. Design manuals and codes from American Concrete Institute (ACI) and Canadian Standards Association (CSA), as well as the American Association of State Highway and Transportation Officials (AASHTO) has been used to calculate the capacity of the slab regarding flexural deflection, moment capacity and shear capacity. The lattice girder slab has also been dimensioned with regular steel reinforcement in accordance with Eurocode 2, for a \ncomparison. Finite Element Method (FEM) has also been used to validate the results and study the \nload-deflection difference of the different material properties. Additional study has been done on \nbond and fire resistance for FRP-rebars embedded in concrete structure.\n\nThroughout the study it has been found that large spans with FRP-rebar have challenges when it \ncomes to flexural deflection. This is mainly due to low modulus of elasticity which contributes to less \nlongitudinal stiffness compared to steel. By pre-tensioning FRP-rebar it is possible to overcome this\nand take advantage of the high tensile strength to pretension with camber, especially for carbon \nfiber rebars. Bond between FRP-rebar and concrete is usually as good or some cases better that \nribbed steel rebar if surface has been treated with sand coating or helical twinned fibers. Fire \nresistance is generally low because of matrix low glass transition temperature and extra cover is \nnecessary for protection.
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How this classification was reachedexpand
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 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 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 teacher head, 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".