Vol 6, No 2 (2015) > Civil Engineering >

Strength and Energy Absorption of High-strength Steel Fiber-concrete Confined by Circular Hoops

Antonius Antonius



This paper presents the results
of an experimental study of the behavior of steel fiber high strength concrete confined
by hoops round cross-section. Behavior strength and energy absorption
capability of confined fibrous concrete is the main focus in this study.
Fibrous concrete test specimens are made by varying the concrete compressive
strength, characteristics of confining reinforcement that is volumetric ratio
and spacing. All these specimens use longitudinal reinforcement with the same
ratio. Experimental results shows that the strength enhancement of confined steel
fiber concrete is strongly influenced by the characteristics of the installed confining
reinforcement. Stress-strain behavior of confined steel fiber high strength
concrete between predictions based on existing confinement models with
experimental results differ significantly, especially in the post-peak
behavior. Therefore, prior modifications or developed the confinement model in
order to obtain predictions of the behavior of confined steel fiber high
strength concrete  accurately.

Keywords: steel fiber, strength, ductility, toughness, confinement model

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