Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Seismic Resistance of Cast-In-Place Concrete-Filled Hollow PC Columns

현장타설 콘크리트 채움 중공 PC기둥의 내진성능

  • Lim, Woo-Young (Dept. of Architecture & Architectural Engineering, Seoul National University) ;
  • Park, Hong-Gun (Dept. of Architecture & Architectural Engineering, Seoul National University) ;
  • Oh, Jung-Keun (Construction Technology Center, Samsung C&T Engineering and Construction Group) ;
  • Kim, Chang-Soo (Construction Technology Center, Samsung C&T Engineering and Construction Group)
  • 임우영 (서울대학교 건축학과) ;
  • 박홍근 (서울대학교 건축학과) ;
  • 오정근 (삼성물산(주) 건설부문 기술연구센터) ;
  • 김창수 (삼성물산(주) 건설부문 기술연구센터)
  • Received : 2013.07.01
  • Accepted : 2013.11.27
  • Published : 2014.02.28
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Abstract

Two types of cast-in-place concrete-filled hollow PC (HPC1, HPC2) columns were developed to reduce lifting load of heavy-weight PC columns and to improve the structural integrity of joints. To form the hollow PC columns, a couple of prefabricated PC panels was used for HPC1, and special hoops were used for HPC2. Lateral pressure of wet concrete on PC faces was measured while placing the concrete inside the columns. To evaluate the seismic resistance, full scale specimens of two HPC columns and a conventional RC column were tested under combined axial compression and lateral cyclic loading. The test results showed that the structural performance of the proposed HPC columns such as intial stiffness, maximum strength, and displacement ductility was comparable to that of the conventional RC column, but the energy dissipation of HPC2 slightly decreased after rebar-buckling. However, all the test specimens satisfied the energy dissipation requirement specified in ACI 374.

중량 PC기둥의 양중부하를 저감하고 접합부 구조일체성을 개선하기 위하여, 두 가지 형태의 현장타설 콘크리트 채움 중공 PC기둥(HPC1, HPC2)을 개발하였다. 중공의 PC단면을 구현하기 위해, HPC1은 조립철근망이 설치된 선제작 PC패널 한 쌍을 활용하였으며, HPC2는 특별한 띠철근을 활용하였다. 심부콘크리트 타설시 측압을 측정하였으며, 내진성능을 평가하기 위하여 실물크기의 HPC1, HPC2 기둥과 비교용 RC 기둥에 대하여 일정축력하 주기횡하중실험을 수행하였다. 실험 결과 HPC 실험체는 초기강성, 최대강도, 변위연성도 등 구조성능면에서 RC 실험체와 유사한 거동을 보였으며, 다만 단면을 관통하는 내부띠철근이 없는 HPC2의 경우에는 주철근의 좌굴이 발생한 이후 에너지소산능력이 다소 떨어졌다. 하지만 세 실험체 모두 ACI 374에서 요구하는 에너지소산능력을 만족하였다.

Keywords

References

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