초록
본 연구에서는 고강도 콘크리트 기둥-일반강도 콘크리트 슬래브 접합부의 구속도, 형상비 (h/c), 강도비 ($f^{\prime}_{cc}/f_{cs}$)에 따른 구조거동 분석하였다. 유한요소해석 프로그램을 통해 해석적 연구가 수행되었으며, 해석 방법의 검증을 위하여 기존의 구조 실험과 동일한 조건의 해석 부재를 제작하여 결과를 비교하였다. 부재의 종류는 내부기둥, 외부기둥, 모서리기둥, 독립기둥으로 분류하였으며 내부기둥에서 가장 높은 극한강도를 보였다. 또한 형상비가 증가할수록 접합부에 작용하는 축방향 응력이 작게 나타났으며 강도비가 증가할수록 부재의 극한강도가 상승하였으나 1.83이후로는 뚜렷한 강도 증진을 나타내지 않았다.
In this study, the structural performance of high strength concrete (HSC) column-normal strength concrete (NSC) slab connection was investigated according to confinement effects, aspect ratio (h/c) and strength ratio ($f^{\prime}_{cc}/f_{cs}$). The study was conducted by using finite element analysis. To verify the analysis methods, the experiments and analyses results were compared. The specimens were classified by connection types including interior column, edge column, corner column and isolated column. As a result, ultimate strength of interior column was larger than other specimens. Also, the axial stresses of connection were decreased when the aspect ratio was increased. As the strength ratio between column and slab was increased, the ultimate strength of specimens was also increased until the strength ratio was reached to 1.83.
