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Shear analysis of concrete with brittle reinforcement
The design of steel-reinforced concrete relies on lower-bound plasticity theory, which allows an equilibrium-state to be postulated without considering compatibility. This is of particular benefit in shear design, due to the complexity of shear-transfer, where simplified models such as the truss analogy are used. If brittle reinforcement (such as fiber-reinforced-plastic (FRP)) is used in concrete, lower-bound plasticity theory cannot be applied. This paper studies how compatibility, equilibrium, and the material constitutive laws can be combined to establish the actual conditions within an FRP-reinforced beam subjected to shear. The modern understanding of shear in steel-reinforced concrete beams without stirrups is based on a very similar approach, and the techniques developed for those beams can be extended to analyze beams with FRP reinforcement. Crack-based modeling is a more valid approach to analysis than current design proposals, since it cnsiders compatibility requirements in detail. Previous research on FRP reinforcement is incorporated into the model. While further research is required to calibrate and verify the model, it has been used in this papr to highlight the implications of using brittle reinforcement in a concrete beam.
Shear analysis of concrete with brittle reinforcement
The design of steel-reinforced concrete relies on lower-bound plasticity theory, which allows an equilibrium-state to be postulated without considering compatibility. This is of particular benefit in shear design, due to the complexity of shear-transfer, where simplified models such as the truss analogy are used. If brittle reinforcement (such as fiber-reinforced-plastic (FRP)) is used in concrete, lower-bound plasticity theory cannot be applied. This paper studies how compatibility, equilibrium, and the material constitutive laws can be combined to establish the actual conditions within an FRP-reinforced beam subjected to shear. The modern understanding of shear in steel-reinforced concrete beams without stirrups is based on a very similar approach, and the techniques developed for those beams can be extended to analyze beams with FRP reinforcement. Crack-based modeling is a more valid approach to analysis than current design proposals, since it cnsiders compatibility requirements in detail. Previous research on FRP reinforcement is incorporated into the model. While further research is required to calibrate and verify the model, it has been used in this papr to highlight the implications of using brittle reinforcement in a concrete beam.
Shear analysis of concrete with brittle reinforcement
Scheranalyse von Beton mit einer spröden Verstärkung
Stratford, T. (author) / Burgoyne, C. (author)
Journal of Composites for Construction ; 7 ; 323-330
2003
8 Seiten, 8 Bilder, 39 Quellen
Article (Journal)
English
Beton , Armierung , faserverstärkter Kunststoff , Verstärkung (Festigkeit) , Spannungsanalyse , mechanische Spannungsverteilung , Scherbeanspruchung , Versagensart , Rissbildung , spröder Werkstoff , Druckspannung , theoretische Untersuchung , Sprödbruch , Verträglichkeit , physikalisches Gleichgewicht
Shear analysis of concrete with brittle reinforcement
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