Abstract
In this study, the total maintenance cost for public houses in South Korea was analyzed, and the effect of each repair process on the total maintenance cost was evaluated with probabilistic and deterministic methods. In the probabilistic method, quality of repair materials and construction skills were considered in the variability of extended service life through repair, while the deterministic method considered it by simple summation of repair step. The repair cost was analyzed considering the coefficient of variation (COV) of extended service life, so the reasonable total maintenance cost was able to be evaluated. Since the results through the probabilistic method provided a continuous cost line, a reasonable repair strategy was carried out by simply changing the intended service life of the structure. The repair cost was additionally analyzed with constant COV (0.15) of each repair process for considering various situations. The analysis results with a COV of 0.15 exhibited a slightly higher maintenance cost than those with current COV. The total maintenance costs can be adjusted if the initial repair timing is extended to the largest possible extent for the highest-repair-cost process since the total repair cost is dominated by the process with the highest repair cost.
Highlights
For large structures, the exposure environment is analyzed, and thereafter, the durability design is established based on deterioration modeling to secure stability and durability [1,2]
The conditions to ensure that the number of repairs is one are: T1 is smaller than the target service life (Tend ) and the sum of T2 and T1 is larger than Tend
The probabilistic measures of the structural members of public houses, derived in previous studies, were quantified, and the repair cost was analyzed by assuming a normal distribution according to the target service life
Summary
The exposure environment is analyzed, and thereafter, the durability design is established based on deterioration modeling to secure stability and durability [1,2]. The deterministic methods have been used in these studies; the maintenance cost of a structure or member is determined by totaling the additional costs Such deterministic methods or probabilistic methods applied in modeling have been used to evaluate the service life or repair period of large structures as well as the service life of rental houses [8,9]. Studies have been conducted to systematize the members for the finishing work of rental houses and to analyze the pattern of service life for each repair process through probabilistic approaches [14] While these studies are considerably effective in constructing databases for maintenance by analyzing the service life variation of each member, they face limitations in the calculation of the total maintenance cost considering the service life. The effects of the probabilistic variation and repair cost for each repair process on the total maintenance cost were quantitatively analyzed
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