Abstract
The maintenance of structures must be carried out periodically according to the performance degradation. The change of performance of structural system happens with multiple states including partial failures according to the passage of time. Such a system is known as a MSS (Multi-state system). Taking account of the appropriate maintenance of a MSS structural system with performance degradation, the reliability evaluation approach considering the time series MSS should be used.
In this study, an optimization approach of repair plan of RC slab of piled pier is proposed by the reliability evaluation method of time series MSS. Specifically, the performance degradation due to salt damage is considered and modeled by a time series MSS, and some optimal maintenance approaches proposed. Simultaneously, under the limit condition of a reliability evaluation index or the total repair expense, the safety and life cycle cost of the repair plan were compared using repair expense and a reliability assessment result. The costs of repairs are calculated and repair plans can be optimized.
