SELECTION OF COUNTERMEASURE AGAINST LIQUEFACTION OF SANDY GROUND ON WHICH PRE-EXISTING STRUCTURE EXISTS

既有建筑物砂地液化对策的选择

• 批准号: 07555638
• 负责人: YASHIMA Atsushi
• 金额: $ 0.45万
• 依托单位: GIFU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555638/
• 关键词: liquefaction; constitutive model; three-dimensional analysis; effective stress; centrifuge test; Hyogo-ken Nambu earthquake; personal computer; 遠心力載荷試験; 既設構造物; 砂地盤; 地震動; 地盤改良; 解析

A numerical method which helps engineers design the countermeasure against liquefaction of sandy ground on which pre-existing civil engineering structure exists has been proposed.1) The constitutive equation has been modified to predict the complex behavior of the sandy ground close to the pre-existing structure.2) A three-dimensional effective stress-based finite element method has been proposed. The validity of the proposed analytical tool was proved based on the comparison between numerical results and centrifuge tests.3) The proposed three-dimensional finite element method has been applied to the liquefaction problem of man-made island.4) Personal computer based analytical tool has been constructed to design the countermeasures against liquefaction easily. The procedure to determine material parameters appeared in the constitutive model has benn also proposed.

提出了一种可以帮助工程设计人员设计既有土木工程结构砂土地基液化对策的数值方法。1)对本构方程进行了修正，以预测砂土地基在现有结构附近的复杂性态。2)提出了一种基于三维有效应力的有限元方法。3)将所提出的三维有限元方法应用于人工岛液化问题。4)构建了基于PC机的分析工具，方便地设计了液化对策。给出了本构模型中材料参数的确定方法。

项目成果

八嶋厚: "水の圧縮性を考慮した3次元液状化解析" 第40回地盤工学シンポジウム論文集. 1. 257-264 (1995)

Atsushi Yashima：“考虑水压缩性的三维液化分析”第 40 届岩土工程研讨会论文集 1. 257-264 (1995)。

岡 二三生: "鉛直アレー観測記録を用いたポートアイランドの連成3次元液状化解析" 土木学会・阪神・淡路大震災に関する学術講演会論文集. 1. 137-144 (1996)

Fumi Oka：“利用垂直阵列观测记录对港口岛进行耦合三维液化分析”日本土木工程学会阪神淡路大地震学术会议论文集 1. 137-144 (1996)。

A.Yashima: "Comprehensive Study of the Great Hanshin Earthquake" United Nations Centre for Regional Development, 244 (1995)

A.Yashima：“阪神大地震的综合研究”联合国区域发展中心，244（1995）

八嶋厚: "鋼矢板工法の液状化抑止効果について" 第7回中部支部地盤工学シンポジウム論文集. 1. 17-22 (1995)

Atsushi Yashima：“论钢板桩法的液化防止效果”第7届中部分会岩土工程研讨会论文集1. 17-22（1995）。