STRUCTURE MAINTENANCE SUPPORT METHOD USING PERFORMANCE UPDATE MODEL, AND STRUCTURE MAINTENANCE SUPPORT APPARATUS USING PERFORMANCE UPDATE MODEL

摘要

PROBLEM TO BE SOLVED: To support a decision on a rational repair/update strategy saving long term maintenance costs of a structure while maintaining safety thereof, in maintenance repair/update of a structure such as a bridge constituted of a plurality of members having master-servant relationship in view of repair/update works.

SOLUTION: In many members constituting a structure, a plurality of members having the master-servant relationship in view of repair/update works are determined. For each member in the master-servant relationship, an aging degradation is determined at given inspection timing. The degradation which each degradation is expected to reach at the next inspection timing is expressed by a stochastic matrix. Various repair/update strategies are set in dependence on the degradation of each member at given inspection timing, including immediate repair/update of a degraded member and adjourned repair/update to the next inspection timing. For each repair/update strategy, a minimum value of life cycle costs of the structure is calculated according to the Bellman equation. A repair/update strategy is determined according to the life cycle costs.

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