三陸南地震および東日本大震災による公共建築物の震動被害

摘要

This paper shows the comparison between the frame analysis result and post-earthquake damage evaluation result of a three-story reinforced concrete government office, in which brittle shear failure was observed after both Sanriku Minami and Great East Japan Earthquake. The strength deterioration of short columns and structural walls is taken into consideration in the model, which is derived from component program analysis. The seismic capacity of the structure was investigated by static loading analysis, which was consistent with the second screening result. The time history response analysis was carried out with the acceleration data of two different main shocks. The analytical result demonstrates the obvious relation between earthquake intensity and observed damage.%本検討では2003年三陸南地震および2011年 東北地方太平洋沖地震の二度にわたり被災した鉄筋コンクリート造3階建て公共建築物について耐震診断資料に基づき静的漸増載荷解析および本震観測波形を用いた地震応答解析を行った。地震応答解析結果と建築物の被災度区分判定結果を比較し，以下の知見を得た。