Possibility of response control of foundation-superstructure system considering dynamic soil-structure interaction during strong earthquakes

强震期间考虑动力土-结构相互作用的地基-上部结构系统响应控制的可能性

• 批准号: 17360265
• 负责人: TOKIMATSU Kohji
• 金额: $ 10.43万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360265/
• 关键词: Pile foundation; Earth pressure; Buckling; Liquefaction; Shaking table test; Finite element method; Ground displacement; Soil-structure dynamic interaction; 群杭効果; 地盤構造物系動的相互作用; 有限要素解析

Field investigation after recent earthquakes has shown that damage to foundations and superstructures located in similar soil profile could vary. For example, some foundations were damage without significant damage to their superstructures, while some superstructures collapsed without significant damage to their foundations. Such a difference in damage might have been induced partly by the effects of soil-pile-structure interaction and suggests that the effects of dynamic soil-pile-structure interaction should be properly taken into account in seismic design to mitigate damage to superstructure response and pile stresses. In this study, therefore, centrifuge model tests, large shaking table tests, and numerical analysis were conducted, to estimate dynamic soil-pile-structure interaction in various seismic loading conditions and to investigate possibility of new foundation systems. The test results and analysis have shown that (1) The combination of earth pressure, friction and inertial … More force is affected by the relation between foundation displacement and ground displacement, the height of non-liquefied crust layer, and the relation of natural period of superstructure and ground; (2) The subgrade reaction within a pile group in non-liquefied ground is larger in the leading piles than in the following piles, while that in liquefied ground is larger in the outside piles than the inside piles. As a result, the horizontal load is the largest in the leading piles in non-liquefied ground but in the outside piles in liquefied ground; (3) Buckling stress is estimated by buckling length, soil stiffness and support condition. The slenderness ratio proposed in this study corresponds to that indicated in the guideline for steel structures; (4) Not only soil-pile-structure response but also pile stress is affected such parameter as; predominant period of input motion, natural periods of superstructure and ground, occurrence of liquefaction, presence of foundation embedment. The foundation embedment decreases the pile stresses in non-liquefied ground but increases pile stresses in liquefied ground. Less

最近几次地震后的实地调查表明，位于相似土壤剖面的地基和上层建筑的损坏情况可能有所不同。例如，一些基础受损，但上层建筑没有受到重大损害，而一些上层建筑倒塌，但基础没有受到重大损害。这种损伤差异可能部分是由土-桩-结构相互作用的影响引起的，这表明在抗震设计中应适当考虑土-桩-结构动力相互作用的影响，以减轻上部结构响应和桩应力的损伤。因此，本研究通过离心模型试验、大型振动台试验和数值分析来估计各种地震荷载条件下土-桩-结构的动力相互作用，并探讨建立新基础体系的可能性。试验结果和分析表明：(1)土压力、摩擦和惯性共同作用，地基位移与地面位移关系、非液化地壳层高度、上部建筑与地面自然周期关系对受力影响较大；(2)非液化地基群桩内的路基反力，前桩比后桩大，液化地基群内桩外反力比内桩大。结果表明，在非液化地基中，前桩受水平荷载最大，而在液化地基中，外桩受水平荷载最大；(3)通过屈曲长度、土体刚度和支护条件估算屈曲应力。本文提出的长细比与钢结构指南中规定的长细比相一致；(4)以下参数不仅影响土-桩-结构响应，还影响桩应力；输入运动的主要时期，上层建筑和地面的自然时期，液化的发生，基础埋置的存在。基础预埋降低了非液化地基的桩应力，但增加了液化地基的桩应力。少

项目成果

大型震動台実験に基づく液状化地盤-群杭-構造物系相互作用の検討

基于大型振动台试验的液化地基群桩-结构体系相互作用研究

• 发表时间: 2007
• 作者: 時松孝次;佐藤正義;田端憲太郎;鈴木比呂子
• 通讯作者: 鈴木比呂子

入力地震動が液状化過程での地盤と杭・構造物の動的相互作用に与える影響

液化过程中输入地震运动对地面、桩和结构之间动力相互作用的影响

• 发表时间: 2007
• 作者: 杉本良介;鈴木比呂子;時松孝次
• 通讯作者: 時松孝次

遠心載荷実験における基礎の根入れ効果が杭頭水平力に及ぼす影響と液状化層厚-上部構造物慣性力と土圧合力・側面摩擦力の位相差-

离心加载试验中基础埋置效果对桩头水平力和液化层厚度的影响-上部结构惯性力、土压力合力、侧摩力相位差-

• 发表时间: 2008
• 期刊: 日本建築学会構造系論文集 625
• 作者: 角田克洋;金子佳生;桐越一紀;大西宏治;宮本 則幸;羅黄順;三橋博三;金子佳生;金子佳生;大作亮平;竹林裕高;下川博之;大作 亮平;伊達安基;大作亮平;石原誠一郎;金子佳生;竹林裕高;Yoshio KANEKO;Yoshio KANEKO;Ryohei OSAKU;Hirotaka TAKEBAYASI;Hiroyuki SHIMOKAWA;Ryohei OSAKU;Yasumoto DATE;田村修次
• 通讯作者: 田村修次

Three-dimensional shaking table tests on soil-pile-structure models using E-Defense facility

使用 E-Defense 设施对土桩结构模型进行三维振动台试验

• 发表时间: 2007
• 期刊: Proc. of 4th International Conference on Earthquake Geotechnical Engineering (CD-ROM)
• 作者: Kohji Tokimatsu;Hiroko Suzuki;Kentao Tabata and Masayoshi Sato
• 通讯作者: Kentao Tabata and Masayoshi Sato

液状化地盤において杭頭移動を生じる鋼管杭の曲げ座屈荷重

液化地基中引起桩头移动的钢管桩弯曲屈曲载荷

• 发表时间: 2006
• 期刊: 第41回地盤工学研究発表会
• 作者: 木村祥裕;野間琢生;時松孝次
• 通讯作者: 時松孝次