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Title |
Flexural Strength of Hybrid Steel Fiber-Reinforced Ultra-High Strength Concrete Beams
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Authors |
양인환(In-Hwan Yang) ; 김경철(Kyoung-Chul Kim) ; 조창빈(Chang-Bin Joh) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.3.283 |
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Keywords |
하이브리드 강섬유 ; 초고강도 콘크리트 ; 인장연화 ; 모멘트-곡률 ; 휨강도 hybrid steel fiber ; ultra-high strength concrete ; tension softening ; moment-curvature ; flexural strength |
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Abstract |
This paper proposes a method for predicting flexural strength of hybrid steel fiber-reinforced ultra-high strength concrete beams. It includes an experimental test framework and associated numerical analyses. The experimental program includes flexural test results of hybrid steel fiber-reinforced ultra-high strength concrete beams with steel fiber content of 1.5% by volume. Tensile softening characteristics play an important role in the structural behavior of steel fiber-reinforced ultra high performance concrete. Tension softening modeling is carried out by using crack equation based on fictitious crack and inverse analysis in which load-crack mouth opening displacement relationship is considered. The comparison of moment-curvature curves of the numerical analysis results with the test results shows a reasonable agreement. Therefore, the numerical results confirms that good prediction of flexural behavior of steel fiber-reinforced ultra high strength concrete beams can be achieved by employing the proposed method.
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