Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Experimental Study on the Failure Behavior of RC Octagonal Hollow Section Columns with Aspect Ratio of 4.0 and Longitudinal Steel Ratio of 2.36 ~ 4.71%

형상비 4.0이고 축방향철근비 2.36 ~ 4.71%인 팔각형 중공단면 철근콘크리트 기둥의 파괴거동에 관한 실험적 연구

  • Ko, Seong-Hyun (Research Center of Urban Safety.Civil Engineering Technology, Jeju International University)
  • 고성현 (제주국제대학교 도시안전.건설기술연구센터)
  • Received : 2022.10.03
  • Accepted : 2022.11.10
  • Published : 2022.12.31
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Abstract

The aim of this study is to assess the seismic performance of octagonal hollow cross section reinforced concrete bridge pier, and to investigate the effect of longitudinal reinforcement ratios on the failure behavior. Four octagonal hollow section RC bridge columns of small scale model were tested under a quasi-static cyclically reversed horizontal load with constant axial load. The volumetric ratio of transverse spiral hoop of all specimens was maintained constant(0.206%), the ratios of longitudinal reinforcement were varied(2.36 ~ 4.71%). Failure behavior and seismic performance were investigated. Three specimens with the exception of lap spliced specimen showed flexure-shear failure at final stage. The test results with the exception of lap spliced specimen showed that the displacement ductility factor and accumulated energy dissipation decreased in inverse proportion to the ratio of longitudinal steel.

본 논문의 목적은 팔각형 중공단면 철근콘크리트 교각의 내진성능을 평가하고 축방향철근비가 파괴거동에 미치는 영향을 분석함에 있다. 축소모형 팔각형 중공단면 기둥 실험체 4개를 제작하여 일정한 축력 하에서 반복 횡하중을 가력하는 실험을 수행하였다. 모든 실험체의 횡방향 나선철근 체적비는 0.206%로 일정하고 축방향철근비는 2.36 ~ 4.71%이다. 파괴거동과 내진성능을 분석하였고 겹침이음 실험체를 제외한 3개의 실험체는 최종단계에서 휨-전단 파괴거동을 보였다. 겹침이음 실험체를 제외한 실험결과에서 변위연성도와 누적 에너지소산 능력이 축방향철근비에 반비례하여 감소하는 경향을 나타내었다.

Keywords

Acknowledgement

이 논문은 제주국제대학교 산학협력단의 지원을 받아 수행된 연구이며 이에 감사드립니다.

References

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