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Title |
Probabilistic Estimation of Service Life of Box Culvert for Power Transmission Considering Carbonation and Crack Effect
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Authors |
우상균(Sang-Kyun Woo) ; 이윤(Yun Lee) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2014.18.6.030 |
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Keywords |
전력구 ; 박스 구조물 ; 탄산화 ; 사용 수명 ; 몬테카를로 기법 ; 내구성 Power transmission line ; Box culvert ; Carbonation ; Service life ; Monte Carlo simulation ; Durability |
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Abstract |
The demand of underground structure such as box culvert for electric power transmission is increasing more and more, and the service life extension of these structures is very important. Recent observations in field and experimental evidences show that even steel in concrete can be corroded by carbonation reaction of cover concrete. Carbonation-induced corrosion in concrete may often occur in a high carbon dioxide environment. In this study, the risk of carbonation of box culverts in our nation was evaluated by measuring the carbonation rate and concrete cover depth in field. Then, the service life due to carbonation at the cover depth was calculated by in situ information and the Monte Carlo simulation in a probabilistic way. Additionally, the accelerated carbonation test for the cracked beam specimen was executed and the crack effect owing to the carbonation process on the service life of box culvert was numerically investigated via Monte Carlo simulation based on the experimental results.
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