KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Effective Strength of Concrete Strut in Strut-Tie Model (I) - Methods for Determining Effective Strength of Concrete Strut -

스트럿-타이 모델에서 콘크리트 스트럿의 유효강도 (I): 결정방법의 소개

Yun, Young-Mook
윤영묵

  • Published : 2005.01.31

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Abstract

The strut-tie model approach has proven to be useful in the analysis and design of structural concrete with disturbed region(s). However, to employ the approach the effective strengths of concrete struts required for obtaining the cross-sectional areas of struts and ties and for verifying the geometrical compatibility condition of a selected strut-tie model should be determined accurately. In this study, a literature review of the conventional methods for determining the effective strengths of concrete struts was conducted, and a consistent and general method applicable to any types of two-dimensional structural concrete was proposed. The procedure for applying each method was illustrated through the designs of a reinforced concrete beam and an anchorage zone of post-tensioned concrete. In the companion paper, the validity of the conventional and proposed methods was examined by evaluating the ultimate strength of several reinforced concrete beams tested to failure.

스트럿-타이 모델 방법은 콘크리트 부재의 해석 및 설계에 효과적인 방법으로 알려져 있다. 그러나 스트럿-타이 모델 방법을 콘크리트 부재의 해석 및 실 설계에 적용하기 위해서는 스트럿-타이 모델의 스트럿과 타이의 단면력 결정과 선정한 스트럿-타이 모델의 적합성 판단에 중요한 요소 중의 하나인 콘크리트 스트럿의 유효강도를 정확하게 결정하여야 한다. 본 논문에서는 콘크리트 스트럿의 유효강도 결정방법에 관한 문헌조사를 수행하였으며, 일반적이며 일관성 있는 콘크리트 스트럿의 유효강도 결정방법을 제안하였다. 또한 기존의 전통적인 방법 및 본 연구에서 제안한 방법에 의한 콘크리트 스트럿 유효강도 산정과정을 철근콘크리트 보 및 프리스트레스트 콘크리트 I형보 정착부의 스트럿-타이 모델 설계를 통해 예시하였다. 본 논문의 후속 편에서는 여러 참고문헌 및 본 논문에서 제안한 방법에 의한 콘크리트 스트럿의 유효강도 값을 파괴실험이 이미 수행된 여러 콘크리트 부재의 스트럿-타이 모델 해석에 적용시켜서 이들 방법의 적합성을 평가하였다.

Keywords

References

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