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NTIS 바로가기한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.24 no.3, 2020년, pp.39 - 46
김태훈 (한남대학교, 건설시스템공학과) , 권성준 (한남대학교, 건설시스템공학과)
Carbonation is a deterioration which degrades structural and material performance by permitting CO2 and corrosion of embedded steel. Service life evaluation through deterministic method is conventional, however the researches with probabilistic approach on service life considering loading and cold j...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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콘크리트란 무엇인가? | 콘크리트는 재료 수급성이 용이할 뿐만 아니라 경제적, 공학적 이점을 가지는 건설재료이며, 물 다음으로 가장 많이 사용되는 건설재료이다. 콘크리트 구조는 안정성을 확보하더라도 다양한 노출환경에서 사용 기간의 증가에 따른 열화가 발생한다. | |
지하구조물이 가지는 특징은 무엇인가? | 이러한 열화기구는 매립된 철근을 부식에 대한 활성화 상태로 변화하게 만들고 이로 인해 전면적인 부식 형태가 발생한다. 특히 지하철 구조와 같은 지하구조물의 경우 600 ppm 이상의 이산화탄소의 농도와 60 ~ 70% 수준의 상대습도에 노출되는데, 이는 탄산화 진전에 매우 유리한 환경이다(CEB, 1997; Hwang et al., 2019; Papadakis et al. | |
콘크리트의 결정론적 해석법이 지니는 공학적인 불확실성 (Engineering Uncertainties)은 무엇인가? | 기존 탄산화에 대한 내구수명 평가는 결정론적 해석법으로 내구한계상태를 시간에 따라 증가하는 탄산화 깊이와 피복두께가 동일해지는 시점으로 정의하고 목표내구수명동안 피복 두께가 성능을 유지하는 것으로 하여 이루어져왔다(KDS 14 20 40, 2016). 하지만 일반적인 결정론적 해석법은 콘크리트라는 복합체 특성상 재료 품질, 노출 환경, 시공 과정 등 뿐만 아니라 소요시간에 따른 구조물의 변동성에 대한 고려가 부족하다. 이러한 공학적인 불확실성 (Engineering Uncertainties)을 고려하기 위하여 최근 들어 다중확률변수를 고려한 확률론적 탄산화 해석기법이 내구설계부분에서 활용되고 있다(Amey et al. |
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