ABSTRACT
The complex service environment and increasing traffic volume make the maintenance of service bridges more and more important, and how to improve the service life of bridge members and reduce bridge operation and maintenance costs by optimizing maintenance strategies is a hot issue today. In this paper, a state transfer matrix is constructed based on NBI bridge inspection data, and an optimization model for state maintenance of bridge cables is proposed by using semi-Markov process theory. Taking a large-span cable-stayed bridge as a case study, where the objective is to maintain the normal service level of the ties for 200 years, the most economical maintenance programs for the cables is proposed based on the whole-life-cycle maintenance cost. This case study can provide an effective reference for bridge maintenance departments.
