Strength and energy absorption of high-strength steel fiber-concrete confined by circular hoops
Antonius
Abstract
This paper presents the results of an experimental study of the behavior of high-strength steel fiber-concrete confined by hoops with round cross-sections subjected to concentric loadings. Behavior strength and energy absorption capability of confined fibrous concrete was the main focus of this study. Fibrous concrete test specimens were made by varying concrete's compressive strength and characteristics of hoops reinforcement (i.e., volumetric ratio and spacing). All specimens used longitudinal reinforcement with the same ratio. Experimental results showed that the strength enhancement of confined concrete reinforced with steel fiber is strongly influenced by the characteristics of the installed confining reinforcement. In this paper, the confinement models by researchers were evaluated and compared with the experimental results. The comparison between existing confinement models and experimental results were significantly different, especially in the post-peak behavior. Obtaining accurate characteristic predictions of high-grade confined fibrous concrete is necessary prior to modification of existing confinement models.
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Aip Conference Proceedings
