KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Estimation of Shear Strength of RC Shear Connection for the Steel-Concrete Composite Girder

강합성 거더용 철근콘크리트 전단연결체의 전단강도 평가

  • 신현섭 (한국건설기술연구원 구조교량연구실) ;
  • 유영준 (한국건설기술연구원 구조교량연구실) ;
  • 정연주 (한국건설기술연구원 구조교량연구실) ;
  • 엄인수 ((주)포스코건설 토목환경사업본부)
  • Received : 2009.08.20
  • Accepted : 2010.04.19
  • Published : 2010.06.30
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Abstract

For the purpose of improvement of the load carrying capacity and constructibility of the conventional steel-concrete composite girder through a effective appliance of the construction materials and optimization of the girder section, a new type section of composite girder and RC shear connection were proposed. In this study shear strength of the RC shear connection is estimated, and the characteristics of shear load-slip behaviour is analyzed. Push-out tests on shear specimens and FEM analysis with various design parameters are carried out, and results are analyzed. The results of test and FEM analysis showed that shear strength of RC shear connection is underestimated by the design provisions of the current design code. By regression analysis a empirical equation for the estimation of shear strength of RC shear connection is proposed.

최근 건설재료의 효율적 활용과 단면구조의 최적화로써 기존 강합성 거더의 구조성능과 시공성을 향상시키고자 새로운 형상의 강합성 거더 및 거더와 바닥판의 전단합성을 위한 RC 전단연결체가 고안된 바 있다. 본 연구에서는 RC 전단연결체의 구조거동 및 전단강도를 평가하였다. 이를 위해 전단철근비를 변수로 하여 Push-out 실험을 실시하였고, 다양한 설계변수에 대한 유한요소해석을 수행하여 그 결과를 분석하였다. 실험 및 유한요소해석 결과에 의하면 RC 전단연결체의 전단강도를 기존 규준식으로 산정할 경우 매우 안전측으로 평가된다. 본 연구에서는 RC 전단연결체의 전단강도를 적절히 산정하기 위해 회귀분석적 방법으로 전단강도 평가식을 제안하였다.

Keywords

References

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