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Title |
Analysis of Behaviors of Concrete Strengthened with FRP Sheets and Steel Fibers Under Low-Velocity Impact Loading
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Keywords |
저속 충격 하중 ; FRP sheet 보강콘크리트 ; 강섬유보강콘크리트 ; 초고성능콘크리트 ; LS-DYNA Low-velocity impact loading ; FRP sheet ; Steel fiber reinforced concrete ; Ultra high performance concrete ; LS-DYNA |
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Abstract |
In the case of impact loading test, measurement of the test data has difficulties due to fast loading velocity. In addition, the dynamic behaviors of specimens are distorted by ignoring local fracture. In this study, therefore, finite element analysis which considers local fracture and strain rate effect on impact load was performed by using LS-DYNA, an explicit analysis program. The one-way and two-way specimens strengthened with FRP Sheets and steel fibers were considered as analysis models. The results showed that the impact resistance of steel fiber reinforced concrete (SFRC) and ultra high performance concrete (UHPC) was enhanced. In the case of specimens strengthened with FRP Sheets, GFRP was superior to CFRP in the performance of impact resistance, and there was little effect of the FRP Sheet orientation. The reliability of this analysis model was verified by comparing with previous experimental results.
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