Abstract
2001.3.24 Geiyo earthquake hit at Chugoku district, fortunately the extensive damage and economic losses did not occur though horizontal accelerations of 1g or greater were recorded at some sites. Concerning reinforced concrete buildings, a couple of low rise buildings were damaged. Two school buildings located at the same site in Hiroshima Prefecture, approximately 26km north of the epicenter, were damaged. One of them was severely damaged and another was moderately damaged while they had almost same structural systems. Objective of this study is to clarify the seismic performance of the existing RC buildings as those damaged buildings. Observed damage levels were compared with results of seismic evaluation method and nonlinear static analysis taking account of concrete strength. It was pointed that the obtained concrete strength which were nearly half of the design concrete strength aggravated damages of the buildings.
