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Title |
The Ductile Behavior Test of the Ultra High Perfomance Fiber Reinforced I Beam by the Combination of the Fiber and Group of Reinforcement Bar
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.1.018 |
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Keywords |
강섬유 ; 초고강도 콘크리트 ; 연성거동 ; I형 보 ; 철근 집합체 Steel fiber reinforced concrete ; Ultra high performance concrete(UHPC) ; Ductile behavior ; I Shaped beam ; Bundle of reinforcement bars |
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Abstract |
The purpose of this study is to induce the ductile behavior of the Ultra High Perfomance Concrete Reinforced I beam by substituting the part of steel fiber for bundle of reinforcing bars. Experiment of flexural behavior of the Ultra High Performance Concrete I shaped beam with the combination of the steel fiber and bundle of reinforcement bars was carried out. The volume fractions of steel fiber are 0%, 0.7%, 1%, 2%. The bundle of reinforcing bars and prestressing wire are used to restrain the concrete in compression zone. Length of bundle of reinforcing bar and prestressing wire is the one of test factors. The 9 Reinforced UHPC I shaped beam were made with these test factors. Not only steel fiber but also bundle of longitudinal reinforcing bar has effect to induce the ductile behavior of Reinforced UHPC I beam. The combination of 0.7% or 1.0% steel fiber and bundle of reinforcing bar showed the effective ductile behavior of I beam. The relationship of load-deflection and the crack pattern indicate the usefulness of the bundle of the longitudinal bar which has small diameter with close arrangement each other.
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