2004年新潟県中越地震で発生した地震動と建物被害の対応性

概要

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We investigated the 2004 Niigata-Chuetsu earthquake, where we have both strong ground motion records and building damage data, examining correlation between various indices of seismic destructive power and building damage. We confirmed that the average elastic velocity response in the period range of 1 to 2s with a damping factor of 0.05 which one of the authors proposed as an optimum destructive power index of strong ground motion for predicting building damage has close correlation with actual damage to buildings also in the case of the 2004 Niigata-Chuetsu earthquake. The period range is based on the equivalent periods that are calculated for buildings with typical elastic periods considering inelastic elongation. A vulnerability function of wooden houses for same seismic intensity in the case of the 2004 Niigata-Chuetsu earthquake was smaller compared to that in the case of previous earthquake, such as the 1995 Hyogoken-Nanbu earthquake.
2006-03-30