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Title |
Evaluating Local Damages and Blast Resistance of RC Slabs Subjected to Contact Detonation
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Authors |
리령(Li,Ling) ; 이진영 ; 민경환 ; 윤영수 |
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Keywords |
접촉 발파 ; CFRP 시트 ; 하이브리드 PVA 섬유보강 콘크리트 ; 강섬유 보강 콘크리트 ; 초고성능 콘크리트 ; 크레틀 ; 스폴 ; 브리치 ; LS-DYNA Contact detonation ; CFRP sheet ; PVA ; SFRC ; UHPCC ; Crater ; Spall ; Breach ; LS-DYNA |
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Abstract |
In this study, the resistance of various reinforced concrete (RC) slabs subjected to contact detonation was assessed. In order to enhance the blast resistance, fibers and external FRP sheets were reinforced to RC slabs. In the experiment, the 2,000×1,000×100 mm sized RC slabs were fabricated using normal concrete (NC), steel fiber reinforced concrete (SFRC), polyvinyl alcohol fiber reinforced cementitious composite (PVA FRCC), and ultra-high performance cementitious composites (UHPCC). The damage levels of RC slabs subjected to contact detonation were evaluated by measuring the diameter and depth of crater, spall and breach. The experimental results were compared to the analyzed data using LS-DYNA program and three different prediction equations. The diameter and depth of crater, spall and breach were able to be predicted using LS-DYNA program approximately. The damage process of RC slabs under blast load was also well expressed. Three prediction equations suggested by other researchers had limitations to apply in terms of empirical approaches, therefore it needs further research to set more analytical considerations.
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