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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Shear Behavior of Ultra-High-Performance Concrete Beams Reinforced with High-Strength Steel Bars
Author(s): S. Ahmad, S. Bahij, M. A. Al-Osta, S. K. Adekunle, and S. U. Al-Dulaijan
Publication: Structural Journal
Appears on pages(s): 3-14
Keywords: concrete beam; cracking pattern; high-strength steel; mechanistic model; shear capacity; ultra-high-performance concrete (UHPC); ultra-high-performance fiber-reinforced concrete (UHPFRC)
Abstract:This study was conducted to investigate the effects of key structural parameters on the shear behavior of non-prestressed
ultra-high-performance concrete (UHPC) beams passively reinforced with high-strength steel bars. The parameters studied were shear span to effective depth ratio a/d; volume fraction of steel fibers Vf ; longitudinal reinforcement ratio ρ; and stirrups spacing s. Ten beam specimens with cross-section dimension (width x depth) 5.91 x 8.86 in. (150 x 225 mm) were quasistatically loaded to failure on a simple span length of 68.9 in. (1.75 m), under a four-point loading configuration. The statistical analysis of the experimental data indicated that a/d, Vf, and s have significant effects on the shear capacity of UHPC beams, while the effects of ρ are quite insignificant. A mechanistic model for estimating the shear capacity of reinforced UHPC beams was developed, validated, and shown to be reasonably accurate.
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