In order to reduce the time and labor in damage investigation, post-earthquake damage evaluation method in real time for RC buildings using observed ground motion and building response is proposed. First, capacity spectrum of the building is adjusted according to observed acceleration response records since the capacity spectrum using only current analytical method is not always accurate. Adjusted capacity spectrum not only can estimate the building response at the time of earthquake, but also can estimate response for larger earthquake that the building has not experienced. Then based on the estimated response and adjusted analysis model, the damage level and residual seismic capacity are determined and post-earthquake damage is evaluated. The proposed evaluation could estimate accurately the damage level. However, the accuracy decreases at the point just between the borders of damage level.
