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Title |
Effects of Shear Reinforcements on the Reinforced High-Strength Lightweight Concrete Beams
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Abstract |
In this study, fifteen reinforced high-strength lightweight concrete(HLC) beams were tested to investigate shear behavior of the specimens according to shear reinforcement ratio. Test variables are shear span to effective depth ratio(a/d=2.5, 3.5, 4.5)and shear reinforcement ratio(0∼1.0ρv.ACI). Concrete compressive strength and tensile steel reinforcement ration are constantly 439kg/㎠ and 0.0203, respectively. Test results for the HLC beams showed that ACI code equation underestimates the shear strength of concrete(Vc), and overestimates of shear reinforcements of reinforced HLC beams are lower than those of normal weight concrete beams. Then, the shear strengths of shear reinforcements are increased in proportion not to first degree of shear reinforcement ratio but to square root of them.
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