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Title |
Impact Resistance of Steel Fiber-Reinforced Concrete Panels Under High Velocity Impact-Load
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Authors |
김상희(Sang-Hee Kim) ; 강현구(Thomas H.-K. Kang) ; 홍성걸(Sung-Gul Hong) ; 김규용(Gyu-Yong Kim) ; 윤현도(Hyun-Do Yun) |
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DOI |
https://doi.org/10.4334/JKCI.2014.26.6.731 |
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Keywords |
강섬유보강콘크리트 ; 내충격성 ; 관입 ; 고속충격하중 ; 강섬유 혼입률 ; steel fiber-reinforced concrete ; impact resistance ; penetration ; high velocity impact-load ; steel fiber volume fraction |
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Abstract |
This paper describes the evaluation of the impact performance of steel fiber-reinforced concrete based on high-velocity impact experiments using hard spherical balls. In this experimental study, panel specimens with panel thickness to ball diameter (h/d) ratios of 3.5 or less were tested with variables of steel fiber volume fraction, panel thickness, impact velocity, and aggregate size. Test results were compared with each other to evaluate the impact resistance. The results showed that the percentage of weight and surface loss decreased as the steel volume fraction increased. However, the penetration depth increased with up to steel fiber volume fraction of 1.5%. Particularly the results of specimens with 20 mm aggregates showed poorer performance than those with 8 mm aggregates. The results also confirmed that the impact performance prediction formulas are conservative with (h/d) ratios of 3.5 or less. Despite the conservative predictions, the modified NDRC formula and ACE formula predict the impact performance more consistently than the Hughes formula.
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