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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Performance Based Evaluation of Concrete Strength and Freeze-Thaw Resistance from Wind Speed - Sunlight Exposure Time Effect

풍속과 일조시간에 따른 콘크리트의 강도 및 동결융해 저항성 성능중심평가

  • 김태균 (연세대학교 토목환경공학과) ;
  • 최승재 (연세대학교 토목환경공학과) ;
  • 최지훈 (연세대학교 토목환경공학과) ;
  • 김장호 (연세대학교 토목환경공학과)
  • Received : 2016.09.02
  • Accepted : 2016.11.17
  • Published : 2017.01.01
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Abstract

The phenomena that we experience in everyday life such as snow, rain, wind, and temperature are referred to as weather, and the average state of atmospheric phenomena that occur over a long period of time in a specific region is referred to as climate. In addition, significant variation of climate compared to the average state is referred to as climate change. Concrete structures can have various problems when exposed to elements. Among the problems, the freeze-thaw problem due to extreme climatic factors such as heavy rain and snowfall has become a particularly significant issue recently. The concrete that has been subjected to repeated freeze-thaw rather than too high or low temperature shows serious degradation of durability, and the performance of structures with degraded performance is difficult to recover. Therefore, in this study, concrete durability performance with respect to freeze-thaw from curing conditions change due to wind speed and sunshine exposure time. Concrete freeze-thaw experiment are performed. using wind speed and sunlight exposure time. Also, performance based evaluation through the satisfaction curve based on the freeze-thaw test results are performed.

일상적으로 우리가 매일 경험하는 눈, 비, 바람, 기온과 같은 현상을 날씨라고 하며, 일정한 지역에서 장기간에 걸쳐 나타나는 대기현상의 평균적인 상태를 기후라고 한다. 또한 기후가 평균적 상태에 비해 유의미하게 변동하는 것을 기후변화라고 한다. 콘크리트 구조물의 경우 외부 극한기후환경에 노출 될 경우 다양한 문제점들이 발생할 수 있다. 이러한 문제점들 중 최근 가장 문제가 되고 있는 폭우, 폭설과 같은 극한기후인자요소의 작용을 받아 발생 할 수 있는 동결융해에 대한 현상이다. 콘크리트의 경우 온도가 너무 낮거나 높다고 손상이 발생하는 것은 아니라 동결 융해를 반복적으로 받을 경우 심각한 내구성 저하를 나타나게 되며 실제 성능저하가 된 구조물의 경우 회복하기 힘들게 된다. 따라서 본 연구에서는 극심한 기후변화로 발생 되는 다양한 기후인자 요소 중 풍속-일조시간의 기후변화 양생조건에 대하여 양생 후 콘크리트 동결융해 실험을 접목시켜 상대동탄성계수를 측정하고 이를 바탕으로 성능중심평가 (Performance Based Evaluation (PBE))를 실시하고 대응책을 마련하고자 한다.

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