International Journal of Concrete Structures and Materials

  • 제11권1호
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  • Pages.29-43
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  • 2017
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  • 1976-0485(pISSN)
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  • 2234-1315(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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Experimental Investigation on the Blast Resistance of Fiber-Reinforced Cementitious Composite Panels Subjected to Contact Explosions

  • Nam, Jeongsoo (Laboratory for Materials and Structures, Tokyo Institute of Technology) ;
  • Kim, Hongseop (Department of Architectural Engineering, Chungnam National University) ;
  • Kim, Gyuyong (Department of Architectural Engineering, Chungnam National University)
  • 투고 : 2016.08.18
  • 심사 : 2016.11.06
  • 발행 : 2017.03.30
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초록

This study investigates the blast resistance of fiber-reinforced cementitious composite (FRCC) panels, with fiber volume fractions of 2%, subjected to contact explosions using an emulsion explosive. A number of FRCC panels with five different fiber mixtures (i.e., micro polyvinyl alcohol fiber, micro polyethylene fiber, macro hooked-end steel fiber, micro polyvinyl alcohol fiber with macro hooked-end steel fiber, and micro polyethylene fiber with macro hooked-end steel fiber) were fabricated and tested. In addition, the blast resistance of plain panels (i.e., non-fiber-reinforced high strength concrete, and non-fiber-reinforced cementitious composites) were examined for comparison with those of the FRCC panels. The resistance of the panels to spall failure improved with the addition of micro synthetic fibers and/or macro hooked-end steel fibers as compared to those of the plain panels. The fracture energy of the FRCC panels was significantly higher than that of the plain panels, which reduced the local damage experienced by the FRCCs. The cracks on the back side of the micro synthetic fiber-reinforced panel due to contact explosions were greatly controlled compared to the macro hooked-end steel fiber-reinforced panel. However, the blast resistance of the macro hooked-end steel fiber-reinforced panel was improved by hybrid with micro synthetic fibers.

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참고문헌

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