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The method for estimation is disucussed in this report. The surface layers having irregular shape are named the irregular surface layers. Seismic effects on waves in this region have been discussed recently in many works,and several methods for analysis have been proposed. The FEM computer program FLUSH is used in this paper. This program is usally utilized to compute an approximate three dimensional soil-structure interaction. In this study,the structure is replaced into the surface soft layer consisting of an alluvial soil. The Free Field of this program is a moderate stiff soil. It is able to examine seismic waves in the next points. 1) The approximate three dimensional analysis is made. 2) The complex soil condition which is recoganized as reduction of stiffness and increase of damping capacity derived from large strain level,is treated as a nonlinear response using equivalent linearlization. The ground image in program FLUSH is illustrated in Fig.1. 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地中埋設ライフラインを検討するための不整形な表層地盤の地震動特性の解析
http://hdl.handle.net/10748/00008766
http://hdl.handle.net/10748/00008766ff841d69-5395-425d-aa5f-c57a8d39cbd8
名前 / ファイル | ライセンス | アクション |
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20024-041-002.pdf (280.5 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2017-03-31 | |||||
タイトル | ||||||
タイトル | 地中埋設ライフラインを検討するための不整形な表層地盤の地震動特性の解析 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Life Line | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Finite Element Method | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Surface Layers Having Irregular Base Shape | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Acceleration | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ライフライン | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 有限要素法 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 不整形な表層地盤 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 加速度 | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
国井, 隆弘
× 国井, 隆弘 |
|||||
著者別名 |
Kunii, Takahiro
× Kunii, Takahiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 台地をきざむ河川が形成する沖積低地を有する都市の地形を考えている。この複雑な地盤の中に浅く埋設されるガス,水道管等のライフラインの過去の地震被害は表層地盤の複雑性によると考えられている。本論文はこの事象を解明するための手法を提案して,都市の被害予測のために役立てようとするものである。手法はFEMプログラムFLUSHに基づくが,この方法を用いる論拠を明らかにし十分に有用性を持つ意義を説明する。次に解析結果の1例として2種類の不整形な表層地盤モデルを取り上げ応答計算を加速度について行ない,表層地盤の複雑性にはかなり注目すべきことを立証している。 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | It is important to estimate the damage of underground Life Line to earthquakes. The method for estimation is disucussed in this report. The surface layers having irregular shape are named the irregular surface layers. Seismic effects on waves in this region have been discussed recently in many works,and several methods for analysis have been proposed. The FEM computer program FLUSH is used in this paper. This program is usally utilized to compute an approximate three dimensional soil-structure interaction. In this study,the structure is replaced into the surface soft layer consisting of an alluvial soil. The Free Field of this program is a moderate stiff soil. It is able to examine seismic waves in the next points. 1) The approximate three dimensional analysis is made. 2) The complex soil condition which is recoganized as reduction of stiffness and increase of damping capacity derived from large strain level,is treated as a nonlinear response using equivalent linearlization. The ground image in program FLUSH is illustrated in Fig.1. Two models for analysis are shown in Fig.2. Model-A is treated as the most simple irregurar ground. Model-B is one of standard examples in an urban average valley in the Tokyo region. Relations of shear strain to stiffness and damping of soft suface layer are considered in this paper,as shown in Fig.3. The result of an analysis is made concerning only the maximum values of distribution of accelerations on each mesh point. It is discussed in Fig.4. An amplification in the boundary of surface layer is recognized. Discontineuity of the response characteristics is confirmed in this report. | |||||
書誌情報 |
総合都市研究 号 41, p. 21-26, 発行日 1991-02 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 03863506 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00134354 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
その他のタイトル | ||||||
その他のタイトル | Analysis on Characteristics of Seismic Waves Having Irregular Shape Surface Layers for Underground Life Line | |||||
出版者 | ||||||
出版者 | 東京都立大学都市研究センター | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | postprint |