Development of seismic fragility curves for high-speed railway system using earthquake case histories

Abstract

Investigating damage potential of the railway infrastructure requires either large amount of case histories or in-depth numerical analyses, or both for which large amounts of effort and time are necessary to accomplish thoroughly. Rather than performing comprehensive studies for each damage case, in this study we collect and analyze a case history of the high-speed railway system damaged by the 2004 M6.6 Niigata Chuetsu earthquake for the development of the seismic fragility curve. The development processes are ; 1) slice the railway system as 200 m segments and assigned damage levels and intensity measures (IMs) to each segment