초고강도 콘크리트의 고온 변형 특성을 고려한 변형모델 상수 검토
Examination of Strain Model Constants considering Strain Properties at High Temperature of Ultra-high-strength Concrete
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초록
초고강도 콘크리트를 이용한 부재의 내화 성능을 검토하기 위해서는 실제부재 단위의 시험에 의한 평가가 요구되고 있다. 그러나실제부재 실험을 하기 위해서는 재하 능력이 큰 시험 장비가 필요하기 때문에, 재료 모델을 이용한 해석적 연구를 통해 내화 성능을 평가하고있다. 본 연구에서는 80, 130 및 180 MPa의 초고강도 콘크리트를 대상으로 고온 가열시의 변형 특성을 실험적으로 평가하고 초고강도 콘크리트에 대한 기존 변형 모델의 적용을 검토했다. 그 후, 최소 제곱법에 의해 실험 값과 기존의 변형 모델을 적용한 계산 값의 누적 오차가 가장 작은 상수 값을 도출하고 초고강도 콘크리트에 적용 할 수 있는 변형 모델을 제시했다.
Abstract
Evaluation on the test of actual concrete member to confirm the fire resistance of the concrete member using ultra-high strength concreteis required. However, test equipment which has large loading capacity is needed to the actual member experiment. So, many researchers evaluatedthe fire performance through analytical studies using the material models. This study experimentally evaluated strain properties on ultra-high-strengthconcrete of 80, 130 and 180 MPa with heating and examined to apply the existing strain model about ultra-high-strength concrete. As a results, constantsare drawn by method of least squares applying experimental values and calculated values by the existing strain model, it proposed strain model thatcan be applied to ultra-high-strength concrete.
참고문헌 (11)
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