BUILDING DAMAGE SURVAY AT NAMIE, FUKUSHIMA, DUE TO GROUND MOTION DURING THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE

Abstract

 KiK-net FKSH20 station observed severe strong ground motion during the 2011 off the Pacific coast of Tohoku earthquake. The station is located in a center of Namie town where was the restricted areas due to the Fukushima daiichi nuclear disaster. We performed building damage surveys at the center of town just after temporary entry was accepted. A total ratio of serious damages for wooden frame houses is estimated about 11%. The damage ratio within a 400m from the station is consistent with the observed PGV. We estimated the spatial variation of the damage ratio by categorizing into three areas. In one of the areas located on a natural levee, the ratio is statistically less than the other areas.