Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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An Experimental Study on the Shear Strength of High Strength Reinforced Concrete Columns according to Volume Fraction of Steel Fiber

강섬유 혼입률에 따른 고강도 철근콘크리트 기둥의 전단강도에 대한 실험적 연구

  • 최지웅 (한양대학교 대학원 건축공학과) ;
  • 배백일 (한양대학교 산업과학연구소) ;
  • 최창식 (한양대학교 건축공학부)
  • Received : 2016.12.19
  • Accepted : 2017.03.24
  • Published : 2017.04.30
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Abstract

The purpose of this study is to evaluate the shear strength of steel fiber reinforced concrete columns quantitatively through the experimental program. For this purpose, the volume fraction of steel fiber is determined to main parameter (0%, 1%, 2%), and the cyclic lateral loading tests of columns were performed with constant axial loads. According to the test results, the shear strength of the column with 1% of steel fiber increased 1.61 times and shear strength of the column with 2% of steel fiber increased 1.67 times compared to RC column. Also, it was investigated that the cracks are distributed and angle of cracks is reduced in specimens with steel fiber. This resulted in an increase of the number of transverse reinforcement located on the crack face. Therefore, the shear strength of columns was evaluated by dividing the shear strength contribution by the concrete, transverse reinforcement, and the shear strength increase by the steel fiber. As a result, the shear strength contributions of concrete increased about 29% with 1% of steel fiber and increased about 36% with 2%. Also, the shear strength contributions of transverse reinforcement increased when steel fiber is mixed.

Keywords

Acknowledgement

Supported by : 한국연구재단

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