NDLI: Steel-fibre high-strength concrete prisms confined by rectangular ties under concentric compression

Content Provider	Springer Nature Link
Author	Lima Júnior, H. C. Giongo, J. S.
Copyright Year	2004
Abstract	This paper presents results from a continuing research program that aims to investigate the behaviour of high-strength concrete columns and to recommend some design procedures to Brazilian Building Code. The specific current work deals with experimental behaviour of steel fibre high-strength concrete columns (SFHSCC) confined with low ratios of rectangular ties under concentric compression. Twenty-four small-scale SFHSCC were tested under concentric loading and their behaviour were examined and compared with the behaviour of two normal-strength concrete columns. The variables studied in this work were the concrete strength, amount of transversal reinforcement and volumetric fraction of steel fibre. The results indicated that steel fibre not only improves the columns ductility, but also avoids the premature concrete cover spalling. Further, to improve the ductility of high-strength concrete column, the used amount of steel reinforcement is the same when the confinement or steel fibre is applied.Cet article présente les résultats d'un programme de recherche continue qui a pour but d'étudier le comportement de poteaux en béton à hautes performances et de recommander quelques procédures de projet pour le Code Brésilien du béton armé. Ce travail traite du comportement expérimental de poteaux en béton fibré à hautes performances, confiné par des étriers rectangulaires, sous compression concentrique. Vingt-quatre poteaux de petite échelle ont été testés sous chargement concentrique et leur comportement a été examiné et comparé à ceux des poteaux en béton conventionnel. Les variables étudiées dans ce travail étaient la résistance du béton, la quantité d'armatures transversales et la fraction volumétrique de fibres d'acier. Les résultats ont indiqué que la fibre d'acier augmente non seulement la ductilité des poteaux, mais empêche l'enrobage prématuré de la couverture des armatures longitudinales. De plus, afin d'améliorer la ductilité de poteaux en béton à hautes performances, la quantité d'armatures en acier utilisée est la même que lorsque l'on utilise un confinement par des étriers rectangulaires ou des fibres d'acier.
Starting Page	689
Ending Page	697
Page Count	9
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	37
Issue Number	10
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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