Abstract
In this study, we developed a technology to predict the economic damage to facilities in a certain area during an earthquake to facilitate the efficient application of performance-based maintenance and seismic reinforcement. Additionally, we derived an algorithm for establishing a reinforcement plan that can minimize earthquake damage within a limited budget. The fragility function for earthquake damage assessment utilized the results of previous studies and an optimization-based budget allocation algorithm for seismic reinforcement was developed by calculating the estimated damage before and after seismic reinforcement based on target damage ratio(TDR) concept and linear approximation (COBYLA) algorithm. To verify the applicability of the developed model, a fictitious city with a 30km x 30km section was set up, and bridges, embankments, and buildings were placed. In addition, the pre- and post-reinforcement damages were evaluated according to two earthquake scenarios, and the optimization-based budget allocation model that can minimize the damages was applied.