Abstract
Deterioration process of a pavement is a complex one composed of the deterioration of road surface and the decrease in the load bearing capacity of pavement. Decrease in the load bearing capacity and the deterioration of road surface influence each other. In this study, such a deterioration process of a pavement is expressed by using a composite Markov deterioration model. The soundness level of road surface is observed through road condition surveys. On the other hand, the decline in the load bearing capacity can be detected with a falling weight deflectometer (FWD) or the like. In actual cases of road maintenance and repair, these two kinds of inspections are not conducted at the same time, and so these two kinds of inspection data cannot be obtained concurrently. This study proposes a method for estimating a composite hidden Markov deterioration model considering such systematic sample dropping, and also discusses the effectiveness of the proposed methodology by applying it to a case of the expressway managed by NEXCO.
