In this paper described is the basic concept of the Guideline for Post-earthquake Damage Assessment of RC buildings, revised in 2001, in Japan. This paper discusses the damage rating procedures based on the residual seismic capacity index R that is consistent with the Japanese Standard for Seismic Evaluation of Existing RC Buildings, and their validity through calibration with observed damage due to the 1995 Hyogoken-Nambu (Kobe) earthquake and seismic response analyses of SDF systems. It is shown that the intensity of ultimate ground motion for a damaged RC building structure can be evaluated conservatively based on the R-index in the Guideline.
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