Heterogeneous Deterioration Process and Risk of Deficiencies of Aging Bridges for Transportation Asset Management

The government of the Republic Korea has set minimum service level bridges as Grade B and defined risk management higher than 95 percent. To achieve this goal, it is necessary to understand deterioration process deficiencies for bridges, these characteristics should be reflected in strategy budget investment plan. end, study developed models according bridge ages define heterogeneous aging bridges. build models, collected processed diagnosis data 10 years, a Bayesian Markov mixed hazard model was introduced. Analysis results showed that life expectancy over 30 years remarkably short, 1/3 average network, probability failure seven times new within after completion. In addition, optimal maintenance demand satisfies percent illustrated 44.7 at C continuously maintained annually. urgent prepare preemptive response budget-securing plan which will rapidly increase 39% next 76% 20 years.