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Title |
Face Damage Characteristic of Steel Fiber-Reinforced Concrete Panels under High-Velocity Globular Projectile Impact
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Authors |
장석준(Seok-Joon Jang) ; 손석권(Seok-Kwon Son) ; 김용환(Yong-Hwan Kim) ; 김규용(Gyu-Yong Kim) ; 윤현도(Hyun-Do Yun) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.4.411 |
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Keywords |
강섬유 ; 손상완화 ; 내충격성능 ; 고속비상체 충격 ; 역학적 특성 ; 콘크리트 steel fiber ; damage mitigation ; impact resistance ; high velocity impact ; mechanical properties ; cocnrete |
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Abstract |
This paper investigates the effects of fiber volume fraction and panel thickness on face damage characteristics of steel fiber-reinforced concrete (SFRC) under high-velocity globular projectile impact. The target specimens were prepared with 200 × 200 mm prismatic panels with thickness of 30 or 50 mm. All panels were subjected to the impact of a steel projectile with a diameter of 20 mm and velocity of 350 m/s. Specifically, this paper explores the correlation between mechanical properties and face damage characteristics of SFRC panels with different fiber volume fraction and panel thickness. The mechanical properties of SFRC considered in this study included compressive strength, modulus of rupture, and toughness. Test results indicated that the addition of steel fiber significantly improve the impact resistance of conventional concrete panel. The front face damage of SFRC panels decreased with increasing the compressive toughness and rear face damage decreased as the modulus of rupture and flexural toughness increased. To evaluate the damage response of SFRC panels under high-velocity impact, finite element analysis conducted using ABAQUS/Explicit commercial program. The predicted face damage of SFRC panels based on simulation shows well agreement with the experimental result in similar failure mode.
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