International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Design Equation for Punching Shear Capacity of SFRC Slabs

  • Higashiyama, Hiroshi (Dept. of Civil and Environmental Engineering, Kinki University) ;
  • Ota, Akari (Graduate School of Science and Engineering Research, Kinki University) ;
  • Mizukoshi, Mutsumi (Dept. of Civil Engineering, Kagawa National College of Technology)
  • Received : 2010.12.08
  • Accepted : 2011.01.28
  • Published : 2011.06.30
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Abstract

In this paper, a design equation for the punching shear capacity of steel fiber reinforced concrete (SFRC) slabs is proposed based on the Japan Society of Civil Engineers (JSCE) standard specifications. Addition of steel fibers into concrete improves mechanical behavior, ductility, and fatigue strength of concrete. Previous studies have demonstrated the effectiveness of fiber reinforcement in improving the shear behavior of reinforced concrete slabs. In this study, twelve SFRC slabs using hooked-ends type steel fibers are tested with varying fiber dosage, slab thickness, steel reinforcement ratio, and compressive strength. Furthermore, test data conducted by earlier researchers are involved to verify the proposed design equation. The proposed design equation addresses the fiber pull-out strength and the critical shear perimeter changed by the fiber factor. Consequently, it is confirmed that the proposed design equation can predict the punching shear capacity of SFRC slabs with an applicable accuracy.

Keywords

References

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