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タイトル: | 2015年ネパールゴルカ地震の建物被害調査と常時微動計測 |
その他のタイトル: | Building Damage Survey and Microtremor Measurements for the Source Region of the 2015 Gorkha, Nepal Earthquake |
著者: | 山田, 真澄 林田, 拓己 MORI, Jim MOONEY, Walter |
著者名の別形: | YAMADA, Masumi HAYASHIDA, Takumi MORI, Jim MOONEY, Walter |
キーワード: | 2015年ネパールゴルカ地震 組積造 地震被害 強震動 常時微動計測 2015 Gorkha earthquake Masonry structure Earthquake damage Strong motion Microtremor survey |
発行日: | Jun-2016 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. A |
巻: | 59 |
号: | A |
開始ページ: | 65 |
終了ページ: | 73 |
抄録: | We performed a damage survey of buildings and carried out microtremor observations in the source region of the 2015 Gorkha eathquake. Our survey area spans the Kathmandu valley, and areas to the east and north of the valley. Damage of buildings in the Kathmandu valley was localized, and the percentage of the totally collapsed buildings was less than 5%. East of the Kathmandu valley, especially in Sindhupalchok district, damage of buildings was more severe. In the center of Chautara and Bahrabise, towns in Sindhupalchok district, the percentage of the totally collapsed houses exceeded 40%. North of the Kathmandu valley, the damage was moderate, and 20 to 30% of the buildings were totally collapsed in Dhunche. Based on the past studies and our microtremor observations near the strong motion station, the H/V spectrum in Kathmandu has a peak at around 0.3 Hz, which reflects the velocity contrast of the deep sedimentary basin. The H/V spectra in Chautara, Bahrabise, and Dhunche do not show clear peaks, which suggests that the sites have stiff soil conditions. Therefore, the more severe damage outside the Kathmandu valley compared to the relatively light damage levels in the valley, is probably due to the source characteristics of the earthquake and/or the seismic performance of buildings, rather than the local site conditions. |
URI: | http://hdl.handle.net/2433/217265 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/publications/nenpo/ |
出現コレクション: | Vol.59 A |
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