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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: Flexural Stiffness of High Strength Concrete Beams Reinforced with GFRP Bars
Author(s): J. R. Yost, S. P. Gross, and D. W. Dinehart
Publication: Special Publication
Appears on pages(s): 209-224
Keywords: deflection; flexural stiffness; FRP; reinforced concrete beams
Abstract:Deflection behavior of high strength concrete (HSC) flexural members reinforced with glass-fiber polymer bars (GFRP) is investigated. Because serviceability plays a significant role in establishing design acceptance for GFRP reinforced concrete beams, accurate modeling of flexural stiffness is critical and he effect of influencing parameters must be considered. This study accounts ofr variations in reinforcement ratio ( r ) for HSC beams. Experimental results from twelve simply supported concrete beams reinforced with GFRP bars are compared with published deflection models to establish analytic accuracy. All samples have a hear-span-to-depth ratio of 9.4 and are overreinforced with respect to a balanced strain design. Results show that the ACI 318 and ACI 440 effective moment-of-inertia expressions greatly overestimate flexural stiffnes, with the degree of inaccuracy dependent upon on reinforcement ratio.
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