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Title |
A Study on the Penetration Resistance and Spalling Properties of High Strength Concrete by Impact of High Velocity Projectile
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Authors |
김홍섭 ; 남정수 ; 황헌규 ; 전중규 ; 김규용 |
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DOI |
https://doi.org/10.4334/JKCI.2013.25.1.099 |
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Keywords |
표면관입 ; 배면박리 ; 내충격 성능 ; 고강도 콘크리트 ; 수정 NDRC식 ; US ACE식 penetration of front ; spalling of rear ; impact resistance performance ; high strength concrete ; the modified NDRC formula ; US ACE formula |
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Abstract |
Concrete materials subjected to impact by high velocity projectiles exhibit responses that differ from those when they are under static loading. Projectiles generate localized effects characterized by penetration of front, spalling of rear and perforation as well as more widespread crack propagation. The magnitude of damage depends on a variety of factors such as material properties of the projectile, impact velocity, the mass and geometry as well as the material properties of concrete specimen size and thickness, reinforcement materials type and method of the concrete target. In this study, penetration depth of front, spalling thickness of rear and effect of spalling suppression of concrete by fiber reinforcement was evaluated according to compressive strength of concrete. As a result, it was similar to results of the modified NDRC formula and US ACE formula that the more compressive strength is increased, the penetration depth of front is suppressed. On the other hand, the increase in compressive strength of concrete does not affect spalling of rear suppression. Spalling of rear is controlled by the increase of flexural, tensile strength and deformation capacity.
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