Abstract
RC (reinforced concrete) structures are durable and have a long service life. However, corrosion in embedded steel due to chloride ingress causes durability problems, and this poses a threat to structural performance degradation. The repair cost is very important for the maintenance of RC structures, through which the service life can be extended with reasonable performances. Unlike the conventional deterministic evaluation used to determine repair cost, the probabilistic method can provide a more reasonable result that considers various engineering uncertainties and continuous repair cost. In this paper, the repair cost for an apartment near the seashore was evaluated based on the actual concrete mix proportions and repair unit cost. Two patterns of PSLF (probabilistic service life function) using normal distribution and log distribution were considered for the repair cost evaluation. This was done after the derivation of service life was calculated based on two mix proportions. Within a given service life, various repair costs were evaluated and discussed that considered concrete mix proportions, the pattern of PSLF, and conventional techniques.
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