建物被害と対応した地震動の周期帯の再検討

－2007年能登半島地震，新潟県中越沖地震のデータを加えて－

抄録

A period region of strong ground motions which have close relationship with actural damage to buildings was reinvertigated including the data by the 2007 Noto-hanto Earthquake and the 2007 Niigata-chuetsu-oki Earthquake, where 1.5-2 sec. and 2-2.5 sec. period dominated records were observed for the first time as the site with building damage data. I found that 1-1.5 sec. period region response had closer relationship with the actual damage to buildings, compare to the previously proposed 1-2 sec. region. The reason why 1-2 sec. in stead of 1-1.5sec. region had close relationship with actural damage to buildings in the previous study was investigated. I found the reason was that the JR Takatori record in the 1995 Hyogoken-Nanbu Earthquake which brought about severe damage around the observation site happened to have a large response around the 2 sec., in addition that 1.5-2 sec. and 2-2.5 sec. period dominated records which were observed in the 2007 Noto-hanto Earthquake and the 2007 Niigata-chuetsu-oki Earthquake were not included in the previous data set.