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http://dx.doi.org/10.4334/JKCI.2010.22.4.595

Reliability-Based Service Life Estimation of Concrete in Marine Environment  

Kim, Ki-Hyun (Integrated Research Institute of Construction and Environment, Seoul National University)
Cha, Soo-Won (Dept. of Civil and Environmental Engineering, University of Ulsan)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.4, 2010 , pp. 595-603 More about this Journal
Abstract
Monte-Carlo simulation technique is often used in order to predict service life of concrete structure subjected to chloride penetration in marine environment based on probability theory. Monte-Carlo simulation method, however, the method gives different results every time that the simulation is run. On the other hand, moment method, which is frequently used in reliability analysis, needs negligible computational cost compared with simulation technique and gives a constant result for the same problem. Thus, in this study, moment method was applied to the calculation of corrosion-initiation probability. For this purpose, computer programs to calculate failure probabilities are developed using first-order second moment (FOSM) and second-order second moment (SOSM) methods, respectively. From the analysis examples with the developed programs, SOSM was found to give a more accurate result than FOSM does. The sensitivity analysis has shown that the factor affecting the corrosion-initiation probability the most was the cover depth, and the corrosion-initiation probability was influenced more by its coefficient of variation than its mean value.
Keywords
Monte-Carlo simulation; moment method; corrosion-initiation probability; FOSM; SOSM;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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