A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Energy release in fiber-reinforced plastic reinforced concrete beams
The use of fiber-reinforced plastic (FRP) materials as reinforcement for concrete beams requires the development of design procedures that ensure adequate safety for catastrophic failure. Reinforced concrete beams are ductile because their energy absorption is attributed to the capacity of the steel to yield and deform. In the case of beams reinforced with FRP rebars, the capacity to absorb large amounts of energy through straining in the reinforcing rebars is limited. That is why definitions for ductility that account for the energy absorption using FRP rebars as reinforcement are needed. The results of the experimental tests carried out with variations in reinforcement ratio, overwrapping configurations, addition of stirrups, and addition of fibers, and a comparison with steel reinforcement showed the effect of these variables on strength and energy dissipation. Even though their ductility is less than that of comparable steel reinforced beams, energy dissipation via concrete cracking does ensure good ductility in FRP reinforced beams. A simple analytical model was used to demonstrate fraction of energy stored and dissipated in each material (concrete and FRP). The model was verified by comparing the measured strain on the FRP rebars during the static tests with the strains predicted by the model.
Energy release in fiber-reinforced plastic reinforced concrete beams
The use of fiber-reinforced plastic (FRP) materials as reinforcement for concrete beams requires the development of design procedures that ensure adequate safety for catastrophic failure. Reinforced concrete beams are ductile because their energy absorption is attributed to the capacity of the steel to yield and deform. In the case of beams reinforced with FRP rebars, the capacity to absorb large amounts of energy through straining in the reinforcing rebars is limited. That is why definitions for ductility that account for the energy absorption using FRP rebars as reinforcement are needed. The results of the experimental tests carried out with variations in reinforcement ratio, overwrapping configurations, addition of stirrups, and addition of fibers, and a comparison with steel reinforcement showed the effect of these variables on strength and energy dissipation. Even though their ductility is less than that of comparable steel reinforced beams, energy dissipation via concrete cracking does ensure good ductility in FRP reinforced beams. A simple analytical model was used to demonstrate fraction of energy stored and dissipated in each material (concrete and FRP). The model was verified by comparing the measured strain on the FRP rebars during the static tests with the strains predicted by the model.
Energy release in fiber-reinforced plastic reinforced concrete beams
Freisetzung von Energie in mit faserverstärktem Kunststoff verstärkten Betonträgern
Orozco, Ana Lilia (author) / Maji, Arup K. (author)
Journal of Composites for Construction ; 8 ; 52-58
2004
7 Seiten, 14 Bilder, 3 Tabellen, 7 Quellen
Article (Journal)
English
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