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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Effective Compressive Strength of Corner Columns with Intervening Normal Strength Slabs

일반강도 슬래브로 간섭받은 모서리 기둥의 유효압축강도

  • Received : 2014.09.02
  • Accepted : 2014.11.05
  • Published : 2015.05.30
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Abstract

In this study, a prediction model for the effective compressive strength of corner columns with intervening normal strength concrete slabs was developed. A structural analogy between high-strength concrete column-normal strength concrete slab joint and brick masonry was used to develop the prediction model. In addition, the aspect ratio of slab thickness to column dimension was considered in the models. The reliability of the new prediction model was evaluated by comparison with experimental results and its superiority was demonstrated by comparison with previous models proposed by design codes and other researchers. As a result, with average test-to-predicted ratios of 1.09, a standard deviation of 0.15, the newly developed equation provided superior predictions in terms of accuracy and consistency over all of the existing effective strength prediction approaches including KCI structural concrete design code (2012).

본 연구에서는 일반강도 슬래브가 기둥 사이로 지나가는 형태의 모서리 기둥에 대한 유효압축강도 예측식을 개발하고자 하였다. 예측식 개발을 위해서 고강도 기둥-일반강도 슬래브 접합부와 조적조 구조의 유사성을 이용하였으며, 이에 더하여 기둥 단면치수에 대한 슬래브 두께의 형상비를 고려하였다. 제안된 식에 의한 예측값과 실험값의 비교를 통해 신뢰도를 확인하였으며, 설계기준 및 타 연구자들에 의한 제안식과 비교를 통해 우수성을 검증하였다. 연구결과, 제안식은 예측치에 대한 실험값의 비가 평균 1.02, 표준편차 0.15를 보여 콘크리트 구조기준 (2012)을 포함한 타 유효압축강도 예측식들에 비해 정확도 및 일관성 모두 우수한 결과를 나타냈다.

Keywords

References

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