Abstract
Recently, it is recognized that the concepts of lifecycle cost (LCC) and lifecycle assessment (LCA) are useful to evaluate new technologies and decision-makings in the lifecycle of infrastructures. It is necessary to consider the effect in LCC and LCA when natural events such as earthquake cause damages for transportation infrastructures during their lifecycles. In this research, focusing on earthquakes that cause serious damages, lifecycle evaluations were performed considering probabilities of losses caused by earthquakes. As a result, it was shown that effects of seismic risk were not large in the case of only taking account of structural damages. However, when the user cost was also considered, the seismic risk showed a large value. Furthermore, when transportation infrastructures such as bridges are given different performance levels in a case study, it is shown that lifecycle cost of whole road networks can be minimized.
