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Title |
A Study on the Flexural Performance of Steel Fiber-Reinforced Beams lightly Reinforced Below the Minimum Steel Reinforcement
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Authors |
강덕만(Duk-Man Kang) ; 박용걸(Yong-Gul Park) ; 문도영(Do-Young Moon) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.3.035 |
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Keywords |
최소철근비 ; 연성도 ; 균열저항성능 ; 내하성능 ; 강섬유보강콘크리트 Minimum steel reinforcement ; Ductility ; Crack Resistant Performance ; Load Carrying Performance ; Steel Fiber-Reinforced Concrete |
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Abstract |
In this study, steel fiber-reinforced concrete beams with ordinary steel reinforcements, that are below minimum steel reinforcement amount specified in domestic concrete structure design code, were tested in flexure until failure. Steel reinforcement ratio considered were 44%, 66%, 78% and 100% of the minimum steel reinforcement. Considered steel fiber volume fractions were 0.25%, 0.50%, 0.75% and 1.00%. In results, it is confirmed that steel fibers greatly improve crack performance. Also, the steel fibers contributed to increment in yield load not in ultimate load. But the increment was not greater than the reduction by steel reinforcement reduction. The use of steel fibers in RC beams lightly reinforced below the minimum reinforcement ratio specified design code reduced ductility greatly. Consequently, steel reinforcement ratio in steel fiber-reinforced beams lightly reinforced below the minimum steel reinforcement should be increased in order to enhance proper ductility.
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