Role of initial stress states in the numerical simulation of subsoil-structure interaction during earthquakes

初始应力状态在地震期间地基土-结构相互作用数值模拟中的作用

• 批准号: 08455220
• 负责人: OHTA Hideki
• 金额: $ 4.99万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455220/
• 关键词: constitutive model; numerical analysis; initial stress state; soil-structure interaction; soil; water coupled analysis; deformation analysis; dynamic analysis; earthquake engineering; 原位置; 有効応力; 三軸試験; 動的応答; 圧密変形履歴; 軟弱粘土; 上下部一体構造設計; 初期応力

A series of numerical simulations of the subsoil-structure interaction observed at a few sites during the Kobe earthquake were successfully carried resulting in the initial stress states before the earthquake, behavior during the earthquake and the time dependent behavior after the earthquake of the subsoil-structure system. These results were compared with the data obtained from the in-situ and laboratory tests on the undisturbed samples taken from the sites. The importance of the initial stress states in the ground is emphasized in the numerical analysis designed based on the constitutive model developed by the head investigator. The degree of influence of the initial stress states in the grounds on the numerical results were quantitatively estimated making it possible to systematically combine the static and dynamic analyzes which have been separately developed in the past history of static and dynamic research fields.

对科比地震中几个场地的土-结构相互作用进行了数值模拟，得到了地震前土-结构体系的初始应力状态、地震过程中的行为和地震后的时变行为。这些结果进行了比较，从现场和实验室测试的原状样品从网站上获得的数据。根据首席研究员开发的本构模型设计的数值分析中强调了地面初始应力状态的重要性。定量地估计了地基中初始应力状态对数值结果的影响程度，从而使在过去的静力和动力研究领域中分别发展的静力和动力分析系统地联合收割机结合起来成为可能。

项目成果

Hideki Ohta et al.: "Seismic Deamplifying Effect of Soft Clay Layers" Proc.14th ICSMHFE. (1997)

Hideki Ohta 等人：“软粘土层的地震减放大效应”Proc.14th ICSMHFE。

I.Kobayashi, A.Iizuka, H.Ohta: "Estimate method of ultimate embankment height on soil clayy ground based on soil/water coupled finit element computations" Journal of JSCE,Division of Geotechnical Engineering. No.575/III-40. 207-217 (1997)

I.Kobayashi，A.Iizuka，H.Ohta：“基于土/水耦合有限元计算的土壤粘土地基最终路堤高度的估算方法”日本土木工程师学会学报，岩土工程学部。

太田秀樹他: "粘土の等体積一面せん断強さ" 土木学会論文集. No.582III-41. 173-182 (1997)

Hideki Ota 等人：“粘土的等体积剪切强度”，日本土木工程师学会论文集，第 582III-41 号（1997 年）。

太田秀樹他: "土/水連成要素解析に基づいた限界盛土高さ推定法" 土木学会論文集. No.575III-40. 207-217 (1997)

Hideki Ota 等人：“基于土/水耦合元素分析的有限路堤高度估算方法”，日本土木工程师学会会刊第 575III-40 号（1997 年）。

太田秀樹他: "土/水連成要素解析に基づいた限界盛土高さ推定法" 土木学会論文集. No575III-40. 207-217 (1997)

Hideki Ota 等人：“基于土/水耦合元素分析的有限路堤高度估算方法”，日本土木工程师协会会刊 No575III-40 (1997)。