Advances in concrete construction

  • 제1권1호
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  • Pages.1-27
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  • 2013
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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Steel fibre reinforced concrete for elements failing in bending and in shear

  • Barros, Joaquim A.O. (ISISE, Dept. of Civil Engineering, Univ. of Minho) ;
  • Lourenco, Lucio A.P. (ISISE, Dept. of Civil Engineering, Univ. of Minho) ;
  • Soltanzadeh, Fatemeh (ISISE, Dept. of Civil Engineering, Univ. of Minho) ;
  • Taheri, Mahsa (ISISE, Dept. of Civil Engineering, Univ. of Minho)
  • 투고 : 2012.10.30
  • 심사 : 2012.12.20
  • 발행 : 2013.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Discrete steel fibres can increase significantly the bending and the shear resistance of concrete structural elements when Steel Fibre Reinforced Concrete (SFRC) is designed in such a way that fibre reinforcing mechanisms are optimized. To assess the fibre reinforcement effectiveness in shallow structural elements failing in bending and in shear, experimental and numerical research were performed. Uniaxial compression and bending tests were executed to derive the constitutive laws of the developed SFRC. Using a cross-section layered model and the material constitutive laws, the deformational behaviour of structural elements failing in bending was predicted from the moment-curvature relationship of the representative cross sections. To evaluate the influence of the percentage of fibres on the shear resistance of shallow structures, three point bending tests with shallow beams were performed. The applicability of the formulation proposed by RILEM TC 162-TDF for the prediction of the shear resistance of SFRC elements was evaluated. Inverse analysis was adopted to determine indirectly the values of the fracture mode I parameters of the developed SFRC. With these values, and using a softening diagram for modelling the crack shear softening behaviour, the response of the SFRC beams failing in shear was predicted.

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참고문헌

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