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묶음 대각철근을 갖는 세장한 철근콘크리트 연결보의 이력거동

Cyclic Behavior of Slender Reinforced Concrete Coupling Beams with Bundled Diagonal Reinforcement

  • 한상환 (한양대학교 건축공학부) ;
  • 유경환 (한양대학교 건축공학부) ;
  • 이기학 (세종대학교 건축공학부) ;
  • 신명수 (울산과학기술대학교 도시환경공학부)
  • 투고 : 2015.06.01
  • 심사 : 2015.09.09
  • 발행 : 2015.12.30

초록

병렬전단벽시스템은 횡력저항에 있어서 효율적인 구조시스템이지만, 각 독립벽체를 연결하는 연결보의 복잡한 철근상세로 인해 시공상의 어려움이 있다. ACI-318에서는 개선된 철근상세를 제안했지만, 이 또한 과도한 횡보강근으로 인해 대각철근의 중심부의 철근 배근 혼잡으로 인해 현장 적용에 어려움이 따른다. 본 연구에서는 프리캐스트를 통하여 철근 배근 오차 및 콘크리트 품질 등의 저하를 줄이고 ACI 318-11의 개선된 상세에 따른 기준 실험체와 일반대각철근을 묶음대각철근으로 대체한 철근콘크리트 연결보의 이력거동을 비교 평가하였다. 그 결과, 묶음대각철근을 적용한 실험체는 현행기준에 따른 연결보와 비교하여 유사한 이력거동을 나타냈고, 더 우수한 에너지소산능력을 나타냈다. 묶음대각철근을 적용한 철근콘크리트 연결보가 현행기준에 따르는 연결보를 대체하여 현장적용이 가능할 것으로 판단된다.

Coupled shear walls are effective lateral force resisting system in which coupling beams link individual walls. For improving the energy dissipation capacity of coupling beams, diagonal reinforcement details were developed. However, it is difficult to construct diagonal reinforced coupling beams due to the congestion of reinforcement in the beam. For resolving the problem, this study developed precast coupling beams with bundled diagonal reinforcement. To reduce the reinforcement congestion, bundled diagonal reinforcement were placed in the coupling beam. To evaluate the cyclic performance of coupling beams with bundled diagonal reinforcement, experimental test were conducted. For this purpose, two slender specimens with an aspect ratio of 3.5 were made and tested. It was observed that the cyclic performance of the coupling beam with bundled diagonal reinforcement was similar with that of the coupling beam with normal diagonal reinforcement placed according to design code to ACI 318-11.

키워드

참고문헌

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