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1.

論文(リポジトリ)

論文(リポジトリ)
本郷, 美佐緒 ; ト部, 厚志 ; 片岡, 香子 ; 鈴木, 幸治 ; Hongo, Misao ; Urabe, Atsushi ; Kataoka, Kyoko ; Suzuki, Koji
出版情報: 新潟大学積雪地域災害研究センター研究年報.  26  pp.61-65,  2004-12.  新潟大学積雪地域災害研究センター
URL: http://hdl.handle.net/10191/39260
概要: The Niigata Chuetsu earthquake (M6.8) occurred on October 23, 2004. It caused widespread hazards and damages in the Chuetsu area, Niigata Prefecture, which including 46 deaths, house destruction of more than 100,000, a great deal of land deformation and structures. Especially, a seismometer installed in the Kawaguchi Town, where located in the eastern part of the epicenter, recorded seismic intensity of 7. We investigated the earthquake hazards and property damages in the Wanazu district, Kawaguchi Town, and preliminary examined the geomorphological and geological aspects of land on which the houses are situated. Most of properties in this district are situated on four terrace surfaces, flood plain, natural levee and two alluvial fans. The house damages are concentrated on steep slopes of alluvial fans overlying terrace and gently slopes of alluvial fan deposits, and are also comparatively concentrated on terraces in the left bank of the Uono River. On the other hand, the house damages situated on terraces in the right bank of the Uono River are less than on which in the left one. Therefore, it is inferred that ground in the Wanazu district were received strong motion by the Niigata Chuetsu earthquake on the left bank of the Uono River. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
ト部, 厚志 ; 片岡, 香子 ; 本郷, 美佐緒 ; 鈴木, 幸治 ; 安井, 賢 ; Urabe, Atsushi ; Kataoka, Kyoko ; Hongo, Misao ; Suzuki, Koji ; Yasui, Satoshi
出版情報: 新潟大学積雪地域災害研究センター研究年報.  26  pp.55-60,  2004-12.  新潟大学積雪地域災害研究センター
URL: http://hdl.handle.net/10191/39267
概要: Niigata-ken Chuetsu earthquake (M6.8) was occurred in the Chuetsu district in Niigata Prefecture at 17:56 23rd October, 2004. Damage becomes the large disaster of fatalities 46 persons, serious or slight injury person 4,791 persons, complete collapsed house 2,827, half collapsed house 12,746, partly failure house 100,453 at 18th March. Serious damages such as Kawaguchi Town and Ojiya City, which recorded seismic intensity of 7, are unevenly distributed. The localization of this damage seemed to appear by many factors such as strong motion, surface geology, structure and actual age of the houses etc. ln this study, distribution of building damage and subsurface deformation were mapped out in the western part of the Uonuma City (ex-Horinouchi Town) at the eastern part of the hypocenter. From the distribution of the completely collapsed house, the concentration of the damage of the western part of the Shin-Doujima were caused by the strong motion from the hypocenter. In the future, ground and geological structure will be examined from field investigations, seismic prospecting, etc. 続きを見る
3.

論文(リポジトリ)

論文(リポジトリ)
片岡, 香子 ; ト部, 厚志 ; 本郷, 美佐緒 ; 鈴木, 幸治 ; Kataoka, Kyoko ; Urabe, Atsushi ; Hongo, Misao ; Suzuki, Koji
出版情報: 新潟大学積雪地域災害研究センター研究年報.  26  pp.67-71,  2004-12.  新潟大学積雪地域災害研究センター
URL: http://hdl.handle.net/10191/39274
概要: The Niigata Chuetsu earthquake occurred on October 23, 2004 (magnitude 6.8), caused severe hazards and extensive damages in the Chuetu area, Niigata Prefecture. This region is characterized by agricultural lands and hence, there is little variation of buildings and houses. Many Japanese style wooden houses were severely damaged. We investigated the damage of Japanese wooden houses and structures in the Tamugiyama district, Kawaguchi Town. Initially we examined the geomorphological and geological aspects of the land on which the houses are situated. Most of the houses and buildings in the district are situated on poor-sort admixture consisting of sand and mud gravel beds that has low resistance to ground motion. The house damages are concentrated in the east of the district probably due to the intensive spread of strong motion and earthquake energy. Also, the damages are obvious on the edges of terrace surfaces and on steep slopes of small-scale alluvial fans (taluses) accompanied with rupture of ground surfaces. 続きを見る