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構造物の地震応答に及ぼす基礎と周辺地盤の剥離・滑りの影響
http://hdl.handle.net/10458/6612
http://hdl.handle.net/10458/661213de58a0-4da1-448b-b4e7-19cfbe8046c5
| 名前 / ファイル | ライセンス | アクション |
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本文 (286.0 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2020-06-21 | |||||
| タイトル | ||||||
| タイトル | 構造物の地震応答に及ぼす基礎と周辺地盤の剥離・滑りの影響 | |||||
| タイトル | ||||||
| タイトル | Effects Of Separation And Slipage Of Soil-Foundation On Earthquake Response Of Structure | |||||
| 言語 | en | |||||
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| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ | journal article | |||||
| 著者 |
原田, 隆典
× 原田, 隆典× 山下, 典彦× Yamashita, Norihiko |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | During recent years, considerable studies have been devoted to evaluate the dynamic soil reactions acting on the foundation. It is usually assumed in these studies that the surrounding soil medium idealized as viscoelastic half space or stratified layers is perfectly bonded to the foundations. However, the earthquake induced soil reactions on foundations, computed by dynamic analysis under such assumption, will often exceed the available soil reactions. The computed overstresses imply that the separation or the slipage would intermittently occur at some portions of the soil-foundation interface. The objective of this study is to develop a better understanding of the effects of transient separation and slipage between soil and foundation, so that the related reduction in earthquake induced forces acting on foundation and superstructure can be taken into consideration into seismic design of structure and foundation. The mathematical model adopted in this study is quite simple, but may incorporate the most important effects of soil flexibility and realistic mechanics of separation and slipage at soil-foundation interface. The superstructure itself is idealized as a single-degree-of-freedom system attached to a rigid foundation with two-degrees-of-freedom which is flexibly supported. The flexibility and damping of the supporting soil is represented by a Winkler foundation with the spring-damper elements distributed over the entire interface of soil and foundation. The spring-damper elements are assumed to react against only compressive forces (tensionless soil) and follows the Mohr-Columb's failure criteria. It is implied from a numerical example that the foundation should be properly designed to accomodate the transient separation and slipage of soil-foundation interface, because the admissible separation and slipage reduces the earthquake forces acting on structure and foundation. |
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| 書誌情報 |
第8回 日本地震工学シンポジウム p. 1191-1196, 発行日 1990 |
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| 出版タイプ | VoR | |||||
