고강도 콘크리트를 사용한 철근콘크리트 외부 보-기둥 접합부의 거동 평가
Evaluation of Structural Behavior of Reinforced Concrete Exterior Beam-Column Joints with High-Strength Concrete
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초록
이 논문은 고강도 콘크리트를 사용한 철근콘크리트 외부 보-기둥 접합부의 실험결과를 보고한 것이다. 실험체의 주요 실험변수는 접합부파괴모드, 콘크리트 압축강도, 철근의 정착 방법이다. 모든 실험체는 ACI 352R-02 기준에 바탕을 두어 J파괴와 BJ파괴가 되도록 계획하였다. 주철근은 90도 표준갈고리로 하거나 확대머리철근으로 하였다. 실험결과는 콘크리트 압축강도에 제한되는 현행 ACI 설계 기준식이 고강도 콘크리트를 사용한 보-기둥 접합부의 강도를 다소 과소평가하고 있음을 보여준다. 또한 확대머리철근을 가진 J파괴형 보-기둥 접합부의 강도는 표준갈고리를 가진 접합부보다 약 10% 이상 높게 평가되었다.
Abstract
This paper reports the test results of reinforced concrete exterior beam-column joints with high-strength concrete. The mainparameters of eight specimens were joint failure modes, the compressive strength of concrete, and the head shapes of steel bars. All specimens were designed according to ACI 352R-02 design recommendations. Two types of failure modes were considered;J-failure and BJ-failure. The longitudinal steel bars were anchored by 90 degree standard hooks or headed reinforcement. Experimental results indicated that the current ACI design recommendation limited by the compressive strength of concretesomewhat underestimated the strength of beam-column joints with high-strength concrete. In the specimens showed joint shearfailure, the strength of beam-column joints with headed bars was approximately 10 percent higher than that of joints with 90degree standard hooks.
참고문헌 (12)
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