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Title |
Structural Behavior of Steel Fiber-Reinforced Concrete Beams with High-Strength Rebar Subjected to Bending
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.3.093 |
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Keywords |
강섬유 ; 압축강도 ; 고강도철근 ; 휨강도 ; 연성 거동 Steel fiber ; Compressive strength ; High-strength rebar ; Bending strength ; Ductile behavior |
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Abstract |
The purpose of this paper is to investigate the flexural behavior of high-strength steel fiber-reinforced concrete beams with compressive strength of 130 MPa. The paper presents experimental research results of steel fiber-reinforced concrete beams with steel fiber content of 1.0% by volume and steel reinforcement ratio of less than 0.02. Both of normal-strength rebar and high-strength rebar were used in the test beams. Modeling as well as compressive and tensile strength test of high-strength steel fiber-reinforced concrete was performed to predict the bending strength of concrete beams. Tension modeling was performed by using inverse analysis in which load-crack mouth opening displacement relationship was considered. The experimental results show that high-strength steel fiber-reinforced concrete beams and the addition of high-strength rebar is in favor of cracking resistance and ductile behavior of beams. For beams reinforced with normal-strength rebar, the ratio of bending strength prediction to the test result ranged from 0.81 to 1.42, whereas for beams reinforced with high-strength rebar, the ratio of bending strength prediction to the test result ranged from 0.92 to 1.07. The comparison of bending strength from numerical analysis with the test results showed a reasonable agreement.
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