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Title |
Flexural and Punching Behaviors of Concrete Strengthening with FRP Sheets and Steel Fibers under Low-Velocity Impact Loading
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Keywords |
저속 충격하중 ; 펀칭 ; FRP 시트 ; 강섬유 보강 콘크리트 ; 초고성능 콘크리트 low-velocity impact loading ; punching ; FRP sheet ; steel fiber reinforced concrete ; ultra high performance concrete |
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Abstract |
In this study, in order to observe the behaviors of fiber reinforced polymer (FRP) strengthened and steel fiber reinforced concrete specimens for impact and static loads, flexural and punching tests were performed. For the one-way flexural and two-way punching tests, concrete specimens with the dimensions of 50 × 100 × 350 mm and 50 × 350 × 350 mm were fabricated, respectively. The steel fiber reinforced concrete specimens showed much enhanced resistance on two-way punching of static and impact loads. In addition the FRP strengthening system provided the outstanding performance under a punching load. Because of a large tensile strength and toughness of ultra high performance concrete (UHPC), the UHPC specimens retrofitted with FRP showed marginally enhanced strength and energy dissipating capacity.
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