콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제24권3호
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  • Pages.241-248
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  • 2012
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  • 1229-5515(pISSN)
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  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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소성힌지부 강섬유 혼입 모르타르 적용 철근콘크리트 기둥의 내진성능평가

Seismic Performance Evaluation of Reinforced Concrete Columns by Applying Steel Fiber-Reinforced Mortar at Plastic Hinge Region

  • 투고 : 2011.09.22
  • 심사 : 2012.05.02
  • 발행 : 2012.06.30
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초록

이 연구에서는, 철근콘크리트 기둥 실험체를 대상으로 기둥의 휨 위험 단면부에 국부적으로 강섬유 시멘트모르타르를 적용함으로서 기존 철근콘크리트 기둥에 비해 내진성능이 우수한 강섬유 모르타르 적용 철근콘크리트 복합기둥공법에 관해 제시하였다. 제시된 적용공법의 성능검증을 위하여 기존 철근콘크리트 기둥 1개 및 소성힌지구간에 국부적으로 강섬유 모르타르를 적용한 복합기둥 실험체 2개를 제작하여 일정 축하중 하에서 횡방향 반복하중을 받는 재하시험을 수행하였다. 콘크리트 및 강섬유 모르타르는 모두 현장타설되었다. 재하시험 결과 기존 철근콘크리트 기둥 실험체와 비교하여 강섬유 모르타르 적용 철근콘크리트 복합기둥 실험체의 경우 휨 및 전단 균열의 제어에 우수할 뿐만 아니라 기둥의 횡하중 내력 및 횡방향 변형 능력 향상에서도 우수한 것으로 평가되었다.

This paper presents a reinforced concrete composite column method in order to improve seismic performance of reinforced concrete column specimens by selectively applying steel fiber-reinforced mortars at the column plastic hinge region. In order to evaluate seismic improvement of the newly developed column method, a series of cyclic load test of column specimens under a constant axial load was investigated by manufacturing three specimens, two reinforced concrete composite columns by applying steel fiber-reinforced mortars at the column plastic hinge region and one conventional reinforced concrete column. Both concrete and steel fiber-reinforced mortar was cast-in placed type. From cyclic load test, it was found that the newly developed steel fiber-reinforced columns showed improved seismic performances than conventional reinforced concrete column in controlling bending and shear cracks as well as improving seismic lateral load-carrying capacities and lateral deformation capacities.

키워드

참고문헌

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피인용 문헌

  1. Experimental Study on Tension-Hardening and Softening Characteristics in Reinforced Mortar with CSA Expansion Agent vol.18, pp.1, 2014, https://doi.org/10.11112/jksmi.2014.18.1.101
  2. Evaluation of Mechanical Properties and Crack Resistant Performance in Concrete with Steel Fiber Reinforcement and CSA Expansive Admixture vol.18, pp.1, 2014, https://doi.org/10.11112/jksmi.2014.18.1.075
  3. Evaluation of Crack Resistant Performance in Cement Mortar with Steel Fiber and CSA Expansion Admixture vol.18, pp.3, 2014, https://doi.org/10.11112/jksmi.2014.18.3.125
  4. Applicability Evaluation and Development of High Strength Spacer with Plastic Fiber and Slag Cement vol.18, pp.4, 2014, https://doi.org/10.11112/jksmi.2014.18.4.092