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Abstract

Synopsis: Seismic risk assessment was conducted in order to quantitatively evaluate damage and loss of a structure due to seismic actions. First of all, The analytical procedures of the proposed risk assessment system, which consists of five phases is shown. Among five Phases, calculation of vulnerability and damage function by means of EFM-method (Phase IV) and the seismic risk assessment (Phase V) are carefully studied. Then, simulations of the risk assessment for two types of reinforced concrete railway viaducts were carried out. The numerical results provided the fragility curves, the damage functions, the expected damage loss, and seismic risk curves which were quite acceptable in the light of engineering experiences. It should be noted that these calculated results reflect the differences in strength demand, directions of structures.