Abstract
Seismic retrofit of existing road bridges is extremely important as a countermeasure against urban seismic disasters and is performed in order of priority determined in advance. Though a plural number of bridges are generally retrofitted at a time, their priorities are not always determined taking the number of bridges retrofitted at almost the same time into account. In this study, we developed a determination method for the priority of seismic retrofit of bridges in which number of bridges retrofitted at a time is included. As the result of application of this method to a model road network, it was found that the number of brides retrofitted at a time considerably affects their retrofit priority.
