Abstract
The deterioration state of each civil infrastructure is evaluated from various aspects, while focusing on several deterioration phenomena. In addition, there is a possibility that several deterioration events interact with one another. In this study, the authors propose a multidimensional deterioration process model for civil infrastructures considering the interaction among several deterioration events. In detail, the progression of each deterioration event is expressed by a mixed Markov deterioration hazard model including heterogeneity parameters. Furthermore, the authors propose a multidimensional deterioration process model expressing the heterogeneity of deterioration rate in each deterioration event with a gamma distribution, and the heterogeneity correlation structure among deterioration events with the Archimedean copula, and a methodology of Bayesian estimation. Lastly, the effectiveness of the proposed method is discussed by using the actual inspection data of expressway expansion joints.
