• 제목/요약/키워드: concrete column

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초음파를 이용한 역타기둥 이음부의 공극특성에 관한 연구 (A Study on Void Characteristics with V-meter in Top-Down Column Joint Part.)

  • 이영도;정상진
    • 한국건축시공학회지
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    • 제1권2호
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    • pp.191-195
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    • 2001
  • When top down method is used, it could be a construction method trouble in column joint, between the former concrete and the latter. It could bring a void and weak concrete in column. The purpose of this study is finding a way to prevent concrete void and concrete suitable for top down , through V-metering for top down column and concrete experiment. To minimize the void of reverse placement joint, It is more effect to use the sheath method then direct method in concrete placement.

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철근콘크리트 기둥의 휨-곡률 모델링 및 변수고찰 (Modeling and Parametric Studies on Moment-Curvature Relations for Reinforced Concrete Columns)

  • 이차돈;최기봉;차준실
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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    • pp.285-290
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    • 2000
  • A mathematical model which can simulate biaxial moment-curvature relations for reinforced concrete column is developed. The developed model is capable of tracing the post-peak behavior of a column after peak load. The model can take into account different sectional shapes of a column and various constitutive models of confined concrete. The developed model is used to evaluate constitutive models of confined concrete under concentric loading, suggested by different researchers. Error function which measures the overall constitutive behavior of a confined concrete is intrcduced. The constitutive model minimizing this error function is selected and is incorporated into the developed model in order to investigate the effect of main parameters on the general column behavior.

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Strategic Utilization of Fiber Reinforced UHSC in Slab-Column Connections

  • Yoon, Young-Soo;Lee, Joo-Ha;Lee, Seung-Hoon
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 봄학술 발표회 논문집(I)
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    • pp.79-82
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    • 2005
  • This study reports on the structural characteristics of slab-column connections using an ultra-high-strength-fiber-reinforced concrete from new and retrospective data. The parameters investigated were the ' puddling ' of ultra-high-strength-fiber-reinforced concrete and the use of high-strength concrete in the slab. The effects of these parameters on the punching shear capacity, negative moment cracking, and stiffness of the two-way slab specimens are investigated. Furthermore, the ACI Code (2002), the CSA Standard (1994), the BS Standard (1985) and the CEB-FIP Code (1990) predictions are compared to the experimental results obtained from some slab-column connections tested in this experiment and those tested by other investigators. The beneficial effects of the ultra-high-strength-fiber-reinforced concrete puddling and of the use of high-strength concrete are demonstrated. It is also concluded that the punching shear strength of slab-column connections is a function of the flexural reinforcement ratio.

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CFT 기둥의 장기거동 특성에 관한 연구 (The Long-term Behavior of CFT-Column)

  • 권승희;김진근
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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    • pp.579-582
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    • 1999
  • This paper represents the results of experiments designed to investigate the time-dependent response of concrete and steel tube in circular concrete-filled steel tubes, as are deployed extensively in high-rise building construction. The experiments were performed for creep of concrete and CFT column specimens with three loading cases. The creep coefficient and specific creep(unit creep) obtained from the test results were used for estimating and comparing the time-dependent response of each case. From these analyses, it is show that CFT-column has many merits for long-term behavior.

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콘크리트 충전 각형 강관기둥의 부착응력에 있어 shear-connector의 영향에 관한 실험적 연구 (A Experimental study about an effect of shear-connector at a bond stress in concrete filled rectangular tubular column)

  • 박성무;김성수;김원호;이형석;이경섭;송준근
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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    • pp.561-566
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    • 2001
  • Load at steel beam column joints transfered by beam depend on bond strength between concrete and steel tube. But it is different to transmit a load efficiently in the established concrete filled steel tubular column. Therefore, shear-connector is demanded for transfering loads efficiently. An ascent of bond stress and a transmission of load after debonding are expected by a reinforcement of shear-connector

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콘크리트 충전원형강관기둥의 부착응력에 있어 shear-connector의 영향에 관한 실험적 연구 (An experimental study about an effect of shear-connector at a bond stress in concrete filled circular steel tubular column)

  • 박성무;김성수;김원호;이형석;이우진;김경모
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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    • pp.567-572
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    • 2001
  • A transmission of load that is transmitted by beam in steel beam-column joint depends on bond strength between concrete and steel tube. But it is different to transmit a load efficiently in the established concrete filled steel tubular column. Therefore, shear-connector is demanded for a reinforcement about a transmission of load. An ascent of bond stress and a transmission of load after debonding are expected by a reinforcement of shear-connector.

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PC 기둥-H형강보의 볼트접합부에 관한 실험적 연구 (An Experimental Study on The Bolted Connection Between H-Beam and Precast-Concrete Column)

  • 조은영;박순규
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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    • pp.181-185
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    • 2003
  • The composite structural system with reinforced concrete column and steel beam has some advantages in the structural efficiency by complementing the shortcomings between the two systems. The system, however, has also a lot of problems in earthquake-proof capacity and construction process because it is wet method of construction. So, this paper proposed PCS(Precast Concrete Column and Steel Beam) structural system with dry method of construction. Purpose of this study is to enhance merit and control failure mechanism by installing Dog-Bone on H-beam.

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철근콘크리트충전 강관기둥과 외부다이아프램을 보강한 H형강 보 접합부의 단순모형에 의한 실험연구 (An experimental study on th reinforced concrete filled tubular column to steel H-beam connections with outer diaphram by simplified connection type)

  • 김인덕;최병극;박성무
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 가을 학술발표회 논문집
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    • pp.587-596
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    • 1997
  • This study is concerning the structural behavior of reinforced concrete filled tubular column to steel H-beam connections with outer diaphram by simplified connection type. The important parameters of this study are the cross-section shape of tubular column and the spacing of hoop (60mm, 30mm, 20mm) and the concrete filled or not. The experimental results are summarized for the strength and displacement of each specimen.

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고강도 재료를 사용한 철근 콘크리트 보.기둥 외부접합부의 전단내력에 관한 실험적 연구 (An Experimental Study on Shear on Shear Capacity of Reinforced Concrete Exterior Beam-Column Joint with High Strength Concrete)

  • 박기철;황홍순;정헌수
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1992년도 봄 학술발표회 논문집
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    • pp.59-66
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    • 1992
  • The objective of this investigation was to dvaluater the factors influencing the vasic shear strength of Exterior Beam-Column Joint. Reversec cyclic loading were carride out for 10 reinforced concrete Exterior Beam-Column subassemblages. All the specimens finally failed in joint shear.

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편심축하중을 받는 강섬유보강 콘크리트 기둥의 실험적 연구 (An Experimental Study on Eccentrically Loaded Steel Fiber Reinforced Concrete Columns)

  • 박홍용;안영진
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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    • pp.857-860
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    • 2000
  • An experimental study on the behavior of Steel Fiber Reinforced Concrete Columns under eccentric compression are presented. Forth-one columns were tested; the variables were column type, eccentricity of load, fiber contents, and longitudinal reinforcement ratio. The column size was $250\times160$ mm in cross section with an effective length of 1150 mm. Eccentricity of load was varied in the range from 1/6 to 1/2 times the column depth. This paper is to provides a framework for basic understanding of the steel fiber concrete columns.