Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Deflection Behavior of Concrete Members Reinforced with FRP Bars

FRP-보강근 콘크리트 부재의 처짐 거동

  • Choi, Bong-Seob (Department of Architectural Engineering, Chungwoon University)
  • 최봉섭 (청운대학교 건축공학과)
  • Received : 2010.11.23
  • Accepted : 2011.02.10
  • Published : 2011.02.28
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Abstract

The effective moment of inertia revising the expression proposed by Branson has been used in ACI 440.1R-06 design guide for calculating deflections of FRP-reinforced concrete members. However, its adequacy has been questioned by several researchers. The propose of this study is to provide fundamental data for the rational design of deflection by the comparison of the experimental results obtained from twelve specimens with rectangular section and nine specimens with T-shaped section to the theoretical results. As a result, it found that calculated results for specimens with rectangular section were underestimated comparing to test results, while calculated results for specimens with T-shaped section were overestimated comparing to test results.

ACI 440.1R-06 설계지침에서는 FRP-보강근 콘크리트 부재의 처짐 계산을 위해 Branson에 의해 제안된 유효단면2차모멘트를 수정 보완하여 제시하고 있다. 그러나 다수의 연구자들은 아직까지도 적용범위의 적절성에 대해 의문점을 제기하고 있다. 이에 본 연구에서는 12개의 장방형 단면과 9개의 T형단면의 FRP-보강근 콘크리트 시험체를 제작하여 처짐 실험을 통해 얻어지는 실험값과 제안된 이론식에 의해 얻어진 계산값을 비교 분석하여 합리적인 처짐설계를 위한 기초자료를 제안하고자 하였다. 결과로서 FRP-보강근 콘크리트 보의 처짐값은 장방형단면에서는 계산값이 실험값 보다 과소평가 되었으나, T형단면에서는 계산값이 실험값 보다 다소 과대평가 되어 나타났다.

Keywords

References

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