Control of Failure Modes of Civil-Infrastructures Experiencing Large Soil Defomations Caused by Surface Fault Ruptures

地表断层破裂引起的土体大变形土木基础设施破坏模式的控制

• 批准号: 12355020
• 负责人: KONAGAI Kazuo
• 金额: $ 16.75万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12355020/
• 关键词: Seismic fault; Large deformation of soil; Earthquake disaster; Data archives; Large deformation analysis; Earthquake Disaster Prevention; 被害データベース

Aug 17, 1999 Kocaeli Earthquake in Turkey and Sept. 21, 1999 ChiChi Earthquake in Taiwan were a serious threat to mega cities. One of the most spectacular aspects of these earthquakes was the damage to structures inflicted directly by faulting, which poses difficult problems to us about minimizing the fault-related damage. Firstly a digital data archive of previous damage examples has been made as the essential basis for further advanced discussions. Secondly some tods have been newly developed for predicting possible extents of fault-induced soil deformations. They include Non-linear Spectral Stochastic Finite Element Method (NL-SSFEM) by Hori, M. et al., Applied Element Method (AEM) by Meguro, K. and Material Point Method (MPM) combined with Hypo-plastic Model by Konagai, K. NL-SSFEM allows a probabilistic estimation of both the fault formation and the possible configuration. It is found from AEM simulations that the peak response exactly above a surface rupture is not likely the largest among those off the rupture plane. Material Point Method (MPM), by virtue of its scheme formulated in an arbitrary Lagrangian-Eulerian description of motion, allows the problem of mesh distortions to be eliminated, and thus large deformation of soils is easily described. MPM is further extended for 3D analyzes, and lastiy in this chapter, behavior of a pile group subjected to soil deformation caused by faulting at its bedrock is numerically studied using the 3D MPM.

1999年8月17日，土耳其科凯利地震和9月1日。1999年21日，台湾集集大地震对特大城市造成严重威胁。这些地震最引人注目的方面之一是断层直接对建筑物造成的破坏，这给我们提出了将与断层有关的损害降至最低的难题。首先，建立了以前破坏实例的数字数据档案，作为进一步深入讨论的重要基础。其次，一些新开发的方法被用来预测断层引起的土壤变形的可能程度。它们包括Hori，M.等人的非线性谱随机有限元方法(NL-SSFEM)，Meguro，K.的应用单元法(AEM)，以及Konagai，K.的材料点法(MPM)和超塑性模型相结合的材料点法(MPM)。AEM模拟发现，地表破裂上方的峰值响应可能不是破裂平面外的峰值响应最大。材料点法(MPM)采用任意拉格朗日-欧拉运动描述格式，消除了网格变形问题，便于描述土体的大变形。将MPM法进一步推广到三维分析中，并利用三维MPM对基岩断层引起的土体变形作用下的群桩性状进行了数值研究。

项目成果

Matsushima, T., Ishii, T., Konagai, K.: "Observation of grain motion in the interior of a PSC test specimen by Laser-Aided Tomography"Soils & Foundations, Japanese Geotechnical Society. 42(5). 27-36 (2002)

Matsushima, T.、Ishii, T.、Konagai, K.：“通过激光辅助断层扫描观察 PSC 测试样本内部的颗粒运动”土壤

Konagai K., Sadr A.: "Examples of Seismic Fault-induced Damage from JSCE/EqTAP Archives"Proc., 2^<nd> Workshop on Seismic Fault-induced Failures. 1/1. 31-50 (2003)

Konagai K.，Sadr A.：“JSCE/EqTAP 档案中地震断层引起的损坏的示例”Proc.，第 2 届地震断层引起的故障研讨会。

M.Hori, M.S.Anders, T.Mizutani: "Analysis of periodic shear band formation"model experiments and numerical simulation, in Bifurcation and Localization Theory in Geomechanics. 311-319 (2001)

M.Hori、M.S.Anders、T.Mizutani：《地质力学分岔和局域化理论》中的“周期性剪切带形成分析”模型实验和数值模拟。

KONAGAI,K.and JOHANSSON Jorgen: "Lagrangian Particles for Modeling Large Soil Deformations"Proceedings of the Workshop on Seismic Fault-induced Failures. 1. 99-106 (2001)

KONAGAI,K. 和 JOHANSSON Jorgen：“用于模拟大型土壤变形的拉格朗日粒子”地震断层诱发故障研讨会论文集。

Konagai, K., Numada, M.: "Pseudo-three dimensional Lagrangian Particle Finite Difference Method for modeling long-traveling soil flows"Journal of Japan Society of Dam Engineers. 12(2). 123-128 (2002)

Konagai, K.、Numada, M.：“用于模拟长程土壤流的伪三维拉格朗日粒子有限差分法”日本大坝工程师学会杂志。