Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Flexural Behavior of RC Beam Made of Slurry Infiltrated Fiber Concrete

슬러리 충전 강섬유 콘크리트로 제작된 RC 보의 휨 거동

  • Received : 2017.09.05
  • Accepted : 2017.10.18
  • Published : 2018.03.01
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Abstract

This paper presents experimental and analytical results on flexural behavior of flexural members made of SIFCON. Twelve SIFCON beams were subjected to bending tests and their flexural behavior was evaluated. Experimental variables included steel fiber type, presence of tensile reinforcement, and height of section. The specimens using Type-B steel fibers, which had better pullout resistance than Type-A steel fibers, showed flexural failure behavior without shear failure. The aspect ratio of steel fiber had a great influence on the behavior of SIFCON beams without tensile steel, however the effect on the behavior of SIFCON beams was negligible. In addition, the flexural strength equation for SIFCON was proposed in the study. The mean and standard deviation of the ratios of the predicted value to the experimental value are 1.02 and 0.04, respectively. Therefore, the proposed flexural strength equation can be useful for the design and performance evaluation of SIFCON beam.

본 논문은 SIFCON으로 제작된 휨부재의 휨거동에 대한 실험적 해석적 연구결과를 제시한다. 우선, 12개의 SIFCON 보에 대한 휨 실험을 실시하고 휨거동을 평가하였다. 실험변수로는 강섬유 종류, 인장철근 유 무, 단면의 높이를 고려하였다. Type-A 강섬유보다 뽐힘저항성이 우수한 Type-B 강섬유를 사용한 시험체는 전단파괴가 발생하지 않고 휨파괴 거동을 보였으며, 강섬유 형상비는 인장철근을 사용하지 않는 SIFCON 보의 거동에 큰 영향을 주었으나 인장철근을 갖는 SIFCON 보의 거동에 대해서는 그 영향이 매우 미미하게 나타났다. 추가적으로 본연구에서는 SIFCON에 대한 휨강도 예측식을 제시하였다. 휨강도 예측값에 대한 실험값의 비의 평균과 표준편차가 각각 1.02와 0.04로 나타나 휨강도 예측식은 SIFCON 보의 설계 및 성능 평가에 유용하게 사용될 수 있을 것으로 생각된다.

Keywords

References

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