Abstract
초고층 빌딩 건설에 있어서 초고강도 콘크리트는 필수적으로 사용되기 때문에 관련연구 또한 증가하고 있다. 이러한 초고강도 콘크리트 배합에는 다량의 시멘트 결합재가 사용되기 때문에 수화열에 의한 온도균열을 평가하고 제어해야만 현장 적용이 가능하다. 본 연구에서는 초고강도 콘크리트의 단열온도상승시험 결과를 이용한 유한요소해석을 통해 초고강도 콘크리트 기둥의 온도균열 분석을 수행하였다. 초고강도 콘크리트 기둥의 형상을 원형과 사각형으로 모델링하여 기둥 형상에 따른 온도, 응력변화 및 온도균열지수를 분석하였다. 그 결과 원형기둥이 사각기둥에 비해 온도균열저항에 더 효과가 있는 것을 확인할 수 있었다. Study on ultra-high-strength concrete(UHSC) has increased since it is essential in skyscraper construction. Since UHSC mixture has a large amount of the cementitious materials, UHSC can be applied on-site only when its thermal crack behavior due to heat of hydration is evaluated and controlled. In this study, finite element analysis using adiabatic temperature rise test data of UHSC was performed to evaluate thermal crack of UHSC columns. By modeling of circular and square UHSC columns, the characteristics of hydration heat, thermal stress, and thermal crack ratio were investigated according to column shape. As a result, it was confirmed that circular columns are more effective in thermal crack resistance than the square column.
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