ABSTRACT
ABSTRACT Load bearing capacity is an index that quantitatively indicates soundness of road pavements. Load bearing capacity is calculated by using data measured in the FWD survey. A road administrator in Japan, adopts the FWD survey to measure load bearing capacity of pavements of expressway in Japan. Load bearing capacity declines over time by being used, and the rates of decline differ because of many internal or external factors. Therefore, it is important for road management to grasp the deterioration tendency for each road characteristic. In this study, using FWD survey data, the authors estimate the deterioration hazard model that each characteristic's deterioration process depends on, and draw performance curves that illustrate the deterioration process visually. In addition, the authors developed a model that can consider the recovery of load bearing capacity by repairs, and estimated repair effects of pavements.
