A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete beams strengthened with externally bonded FRP plates
The overall aim of the research was to investigate the suitability of FRP for externally bonded reinforcement of concrete structures subjected to flexural loading. Aspects of adhesive bonding technology, composite materials, and numerical modelling were used and applied to plate bonding technology. The following conclusions were reached: The peel-ply surface treatment technique for plate bonding applications represents a novel approach, and the particular system adopted exhibited good adhesion characteristics both in the short term and when joints were subjected to environmental aging. The stiffness and strength of the beams strengthened with composite plates was substantial increased. The ultimate load carrying capacity of the beams increased by as much as 230 % over their unplated counterparts. The locus of failure in the beams reinforced with thin laminates was in the cover concrete close to the point loads within the shear span of the beams. The plate debonding/concrete cover failure mechanism is governed by a limiting principal stress value at the concrete/external-plateinter face. Nonlinear FE modeling is a powerful tool for the analysis of externally strengthened concrete beams.
Concrete beams strengthened with externally bonded FRP plates
The overall aim of the research was to investigate the suitability of FRP for externally bonded reinforcement of concrete structures subjected to flexural loading. Aspects of adhesive bonding technology, composite materials, and numerical modelling were used and applied to plate bonding technology. The following conclusions were reached: The peel-ply surface treatment technique for plate bonding applications represents a novel approach, and the particular system adopted exhibited good adhesion characteristics both in the short term and when joints were subjected to environmental aging. The stiffness and strength of the beams strengthened with composite plates was substantial increased. The ultimate load carrying capacity of the beams increased by as much as 230 % over their unplated counterparts. The locus of failure in the beams reinforced with thin laminates was in the cover concrete close to the point loads within the shear span of the beams. The plate debonding/concrete cover failure mechanism is governed by a limiting principal stress value at the concrete/external-plateinter face. Nonlinear FE modeling is a powerful tool for the analysis of externally strengthened concrete beams.
Concrete beams strengthened with externally bonded FRP plates
Mit äußerlich angeklebten Faserverbundwerkstoffplatten verstärkte Betonträger
Rahimi, H. (author) / Hutchinson, A. (author)
Journal of Composites for Construction ; 5 ; 44-56
2001
13 Seiten, 12 Bilder, 3 Tabellen, 52 Quellen
Article (Journal)
English
Verbundträger , Träger (Bauwesen) , Beton , Verstärkung (Festigkeit) , glasfaserverstärkter Kunststoff , Epoxidharz , Klebverbindung , Platte (Bauteil) , Biegeprüfung , Finite-Elemente-Methode , theoretisches Modell , Nichtlinearität , Schadenursache , Adhäsionskraft , Belastbarkeit , Scherspannung , Grenzfläche
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