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http://dx.doi.org/10.14190/JRCR.2017.5.3.230

Simulation on Optimum Repairing Number of Carbonated RC Structure Based on Probabilistic Approach  

Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.3, 2017 , pp. 230-238 More about this Journal
Abstract
Carbonation is a representative deterioration for underground structure, which causes additional repair for service life. This study proposes a simplified equation for optimum repair timing without complicated probability calculation, considering initial and repair conditions For the work, initial service life, extended service life through repair, and their COVs(Coefficient of Variation) are considered, and the periods which can reduce number of repair are evaluated. Assuming the two service lives to be independent, the repair timings are derived from 10 to 50 years based on the probabilistic method, and the regression analysis technique for optimum repairing timing is proposed. Decreasing COV has insignificant effect on reducing repairing number but shows a governing effect on changes in probability near the critical repairing stage. The extension of service life through repairing is evaluated to be a critical parameter for reducing repairing number. The proposed technique can be efficiently used for maintenance strategy with actual COV of initial and additional service life due to repairing.
Keywords
Probability based maintenance; Optimum repair timing; Service life; Carbonation;
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Times Cited By KSCI : 1  (Citation Analysis)
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