Probabilistic Estimation of Service Life of Box Culvert for Power Transmission Considering Carbonation and Crack Effect
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초록
The demand of underground structure such as box culvert for electric power transmission is increasing more and more, and theservice life extension of these structures is very important. Recent observations in field and experimental evidences show that evensteel in concrete can be corroded by carbonation reaction of cover concrete. Carbonation-induced corrosion in concrete may oftenoccur in a high carbon dioxide environment. In this study, the risk of carbonation of box culverts in our nation was evaluated bymeasuring the carbonation rate and concrete cover depth in field. Then, the service life due to carbonation at the cover depth wascalculated by in situ information and the Monte Carlo simulation in a probabilistic way. Additionally, the accelerated carbonationtest for the cracked beam specimen was executed and the crack effect owing to the carbonation process on the service life of boxculvert was numerically investigated via Monte Carlo simulation based on the experimental results.
Abstract
The demand of underground structure such as box culvert for electric power transmission is increasing more and more, and theservice life extension of these structures is very important. Recent observations in field and experimental evidences show that evensteel in concrete can be corroded by carbonation reaction of cover concrete. Carbonation-induced corrosion in concrete may oftenoccur in a high carbon dioxide environment. In this study, the risk of carbonation of box culverts in our nation was evaluated bymeasuring the carbonation rate and concrete cover depth in field. Then, the service life due to carbonation at the cover depth wascalculated by in situ information and the Monte Carlo simulation in a probabilistic way. Additionally, the accelerated carbonationtest for the cracked beam specimen was executed and the crack effect owing to the carbonation process on the service life of boxculvert was numerically investigated via Monte Carlo simulation based on the experimental results.
참고문헌 (7)
- Boulfiza, M., "Prediction of chloride ions ingress in cracked oncrete", ACI Materials Journal, 100(1), pp.38~48 (2003)
- CEB-FIP, "Model code for service life design, The International Federation for Structural Concrete fib", Task Group 5.6, ~ (2006)
- Ismail, M., "Effect of crack opening on the local diffusion of chloride in inert materials", Cement and Concrete Research, 34(4), pp.711~716 (2004)
- Kwon, S. J., "Service life prediction of concrete wharves with early-aged crack, Probabilistic approach for chloride diffusion", Structural Safety, 31(1), pp.75~83 (2009)
- 권성준, "탄산화에 노출된 균열 콘크리트 구조물의 확률론적 내구설계", 대한토목학회 논문집A, 25(5A), pp.741~750 (2005), 대한토목학회
- Nakamura, H., "Time-dependent structural analysis considering mass transfer to evaluate deterioration process of RC structures", Journal of Advanced Concrete Technology, 4(1), pp.147~158 (2006)
- Song, H. W., "Predicting carbonation in early-aged concrete", Cement and Concrete Research, 36(5), pp.979~989 (2006)