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Impact resistance of laterally confined fibre reinforced concrete plates
Abstract The effect of both biaxial and uniaxial lateral confinement on fibre reinforced concrete (FRC) plates under transverse impact loading was investigated. It was found that confinement had a major effect on the failure patterns as well as on the mechanical properties of both plain and fibre reinforced concretes. With different types and degrees of confinement, the failure changed from a flexural mode to a punching shear mode or a combined flexural-shear mode. With confinement, the apparent strength of concrete increased by up to two or three times and the inertial load decreased to a small enough fraction of the measured impact load that it could be ignored in the analysis. The ability of the FRC to absorb energy also increased with increasing confinement.
Résumé Les effets du confinement bi-axial et uni-axial sur les propriétés de plaques de béton renforcé de fibres ont été examinés en conditions de choc. Il a été trouvé que le confinement a des effects majeurs sur le mode de rupture ainsi que sur les propriété mécaniques du béton normal et celles du béton de fibres. Avec un changement de confinement, le mode de rupture a également changé, passant de la flexion au cisaillement. En raison du confinement, la résistance du béton a doublé voire triplé, et le chargement inertiel a été réduit substantiellement. L'absorption d'énergie a aussi augmenté à cause du confinement.
Impact resistance of laterally confined fibre reinforced concrete plates
Abstract The effect of both biaxial and uniaxial lateral confinement on fibre reinforced concrete (FRC) plates under transverse impact loading was investigated. It was found that confinement had a major effect on the failure patterns as well as on the mechanical properties of both plain and fibre reinforced concretes. With different types and degrees of confinement, the failure changed from a flexural mode to a punching shear mode or a combined flexural-shear mode. With confinement, the apparent strength of concrete increased by up to two or three times and the inertial load decreased to a small enough fraction of the measured impact load that it could be ignored in the analysis. The ability of the FRC to absorb energy also increased with increasing confinement.
Résumé Les effets du confinement bi-axial et uni-axial sur les propriétés de plaques de béton renforcé de fibres ont été examinés en conditions de choc. Il a été trouvé que le confinement a des effects majeurs sur le mode de rupture ainsi que sur les propriété mécaniques du béton normal et celles du béton de fibres. Avec un changement de confinement, le mode de rupture a également changé, passant de la flexion au cisaillement. En raison du confinement, la résistance du béton a doublé voire triplé, et le chargement inertiel a été réduit substantiellement. L'absorption d'énergie a aussi augmenté à cause du confinement.
Impact resistance of laterally confined fibre reinforced concrete plates
Sukontasukkul, P. (author) / Mindess, S. (author) / Banthia, N. (author) / Mikami, T. (author)
Materials and Structures ; 34 ; 612-618
2001-12-01
7 pages
Article (Journal)
Electronic Resource
English
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