Experimental Evaluation of Pile-to-Pile Interaction and Impedance Functions with Local Nonlinearity in Soils

土壤中局部非线性桩与桩相互作用和阻抗函数的实验评估

• 批准号: 23560562
• 负责人: SAITOH Masato
• 金额: $ 3.49万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560562/
• 关键词: 非線形動的相互作用; 杭基礎; インピーダンス; 杭間相互作用; 模型振動実験; 鉛直加振; 国際情報交換(ギリシャ); 杭間相互作用係数; 群杭インピーダンス; 動的相互作用; 地震; フーチング; Lumped Parameter Model

This study dealt with impedance functions (IFs) of pile groups subjected to strong vibrations due to earthquakes. IFs are defined as dynamic stiffness and damping representing dynamic characteristics at the interface between superstructure and soil-foundation systems. In general, impedance functions have been evaluated under linear-elastic conditions of soils. However, in accordance with the recent earthquake events, strong ground motions and resultant high amplitude of structural response may generate strong nonlinearity in soils near the piles. Therefore, this study conducted model tests on fixed-head floating piles embedded in cohesionless soil carried out under 1-g conditions, to investigate the effects of local soil nonlinearity on the impedance characteristics of pile groups. Results obtained from such tests indicate that soil nonlinearity markedly change impedance characteristics.

本文研究了受强震作用下群桩的阻抗函数。if被定义为动力刚度和动力阻尼，表示上部结构和地基系统界面处的动力特性。一般来说，阻抗函数是在土的线弹性条件下计算的。然而，根据最近的地震事件，强烈的地面运动和由此产生的高振幅结构响应可能会在桩附近的土壤中产生强烈的非线性。因此，本研究在1 g条件下对无黏性土体中嵌固头浮桩进行模型试验，研究土体局部非线性对群桩阻抗特性的影响。这些试验结果表明，土壤非线性显著改变了阻抗特性。

项目成果

Model tests on validation of principle of superposition in obtaining pile groups'horizontal impedance functions under soil non-linearity

土体非线性下群桩水平阻抗函数叠加原理验证模型试验

• 发表时间: 2012
• 作者: Goit C. S.;Saitoh M. and Mylonakis G.
• 通讯作者: Saitoh M. and Mylonakis G.

地盤の非線形性を考慮した杭間相互作用係数と Superposition Method の適用性に関する実験的研究

考虑地基非线性的桩间相互作用系数及叠加法适用性试验研究

• 发表时间: 2013
• 作者: 齊藤正人、Chandra Goit;Mylonakis George
• 通讯作者: Mylonakis George

Model tests on validation of principle of superposition in obtaining pile groups’ horizontal impedance functions under soil non-linearity.

土体非线性下群桩水平阻抗函数叠加原理验证模型试验

• 发表时间: 2012
• 作者: Goit C. S.;Saitoh M. and Mylonakis G.
• 通讯作者: Saitoh M. and Mylonakis G.

Applicability of Principle of Superposition in Obtaining Horizontal Impedance Functions of Pile Groups under Soil Nonlinearity

叠加原理在获取土体非线性下群桩水平阻抗函数中的适用性

• 发表时间: 2013
• 期刊: Computational Methods in Structural Dynamics and Earthquake Engineering
• 作者: Goit;C. S.;Saitoh;M.;Mylonakis;G.
• 通讯作者: G.

地盤の非線形性を考慮した群杭基礎のインピーダンス特性と動的復元力特性に関する実験的検討

考虑地基非线性的群桩基础阻抗特性及动回复力特性试验研究

• 发表时间: 2012
• 作者: 齊藤正人;Chandra Shekhar Goit,及川大輝
• 通讯作者: Chandra Shekhar Goit,及川大輝