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Title |
Assessment of Material Characterization Effects on the High Strain-Rate Impact Resistance of Steel Fiber-Reinforced High-Performance Cementitious Composites
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Authors |
김원우(Won-woo Kim) ; 유승한(Seung-han You) ; 문재흠(Jae-heum Moon) ; 신현섭(Hyun-seop Shin) ; 김성욱(Sung-wook Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.1.081 |
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Keywords |
고속 충격; 방호; 가스 건; 충격 저항 성능; 고성능 콘크리트; 고성능 섬유보강 시멘트 복합체 impact resistance; high strain-rate; SHPB; gas gun; UHPC; HPFRCC |
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Abstract |
Under extreme loading conditions, such as explosions and high-velocity impacts, the mechanical behavior of concrete differs significantly from that observed under quasi-static loading. This study investigates the impact resistance of a high-performance fiber-reinforced cementitious composite (HPFRCC) subjected to high strain-rate loading through Split Hopkinson Pressure Bar (SHPB) tests and high-velocity gas-gun experiments. The SHPB tests were conducted to characterize the dynamic material properties of HPFRCC under high strain rates, while the gas-gun experiments were performed to evaluate its resistance under impact conditions. In addition, experimentally obtained results were compared with predictions from existing empirical models proposed in previous studies to assess their applicability to ultra-high performance concrete. The results demonstrated that HPFRCC exhibited significantly enhanced impact resistance compared to conventional concrete; however, a substantial discrepancy was observed between the experimental results and the predictions obtained from existing models. These findings highlight the need for developing improved constitutive models and impact resistance prediction methods that explicitly account for the unique material behavior of HPFRCC under high strain-rate loading.
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