DEVELOPMENT OF FRAGILITY FUNCTION FOR WOODEN HOUSE OBTAINED FROM THE FIELD INVESTIGATION OF FLOOD DISASTER DUE TO JULY 13, 2004 NIIGATA HEAVY RAINFALL

Abstract

This paper presents the fragility function for wooden house obtained from the field investigation of the flood disaster in Nakanoshima town, Niigata prefecture due to the July 13, 2004 Niigata heavy rainfall. At the emergency phase of disasters, the early understanding of overview of damage is required for the management of emergency personnel and resource. To understand the overview of damage easily, fragility function which estimates damage from inundation depth is helpful. The inundation depth is measured at many points and the damage rank of each house is identified in the investigation of this disaster. The fragility function is constructed using these data. Additionally, we marshaled those data about building damage and reviewed documents about damages in past tsunami disaster. By comparing obtained data to fragility curve, we considered the influence of driftage on building damage and the adequacy of that curve.