フジイ　ケンジ   Kenji Fujii   藤井　賢志    所属   千葉工業大学  創造工学部 建築学科    千葉工業大学  工学研究科 工学専攻    千葉工業大学  創造工学研究科 建築学専攻    職種   教授
言語種別	日本語
発行・発表の年月	2006/05
形態種別	学術雑誌
査読	査読あり
標題	弾性地盤上における免震構造物の地震時浮き上がり現象
執筆形態	共著
掲載誌名	日本建築学会構造系論文集
出版社・発行元	日本建築学会
巻・号・頁	(603),55-62頁
著者・共著者	小沢　宣行，藤井　賢志，山田　哲，和田　章
概要	When atall seismic isolated building is suffering a big earthquake, large tensile forces may occur at the multi-layer rubber bearings due to the large overturning moment. Tensile stress is critical design problem for such rubber bearings. To avoid such large tensile forces at the bearings, the design idea allowing uplifting at bearings may be preferable for the tall seismic isolated buildings. However, very few studies have made about the nonlinear behaviours of such seismic isolated buildings considering the foundation vertical stiffness. The shaking table test is carried out to investingate the nonlinear dynamic response of seismic isolated buildings that allows the uplifting around the rubber bearings, considering the vertical elastic stiffness of the foundation. From the results getting from the tests, the effect of seismic isolation would be guaranteed even if some bearings step up during earthquakes.