Multiscale Meshfree Analysis of Failure in Geostructures Founded on or Containing Liquefiable Soils
基于可液化土壤或含有可液化土壤的地质结构失效的多尺度无网格分析
基本信息
- 批准号:0825483
- 负责人:
- 金额:$ 23.47万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2008
- 资助国家:美国
- 起止时间:2008-08-01 至 2012-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Analysis of liquefaction-induced instability and failure in slopes and embankments is an important problem of geotechnical earthquake engineering. While various empirically-based and/or simplified approaches have been developed and used in practice, the current state of knowledge of stress-strain-strength behavior of liquefiable soils, the wealth of observed response of soil slopes and embankments during recent earthquakes, and the significant progress in numerical modeling of engineering structures in recent years, have prepared the ground for a more rigorous, yet realistic, approach to the analysis of liquefaction-induced instability and failure. This project is to develop a multiscale approach, which allows the soil response to be captured in both pre- and post-failure stages with a unified constitutive model. Moreover, since the traditional finite element (FE) approach for fully-coupled effective stress analysis of soils is severely limited in handling the near- and post-failure response of a geotechnical system, a meshfree method is proposed to overcome the known difficulties of an FE approach, and to produce reliable and robust solutions in all stages of a liquefaction analysis. The intellectual merit of the project lies in the development and introduction of two very powerful constitutive and numerical methods in the analysis of soil liquefaction. The proposed methods will be implemented in a public domain open source code, which can be used by researchers and practitioners. The developed computational tool will be validated and verified against a series of experimental and field observations on the responses of soil slopes and embankments.The broader impacts of the project include the potential use of the techniques developed in this research in other fields of engineering such as bio-poromechanics and hot rolling processes in metals and alloys. The graduate students trained in the course of this project will have an excellent opportunity to develop a thorough understanding of the mechanisms involved in liquefaction and liquefaction-induced deformation and failure as well as an expertise in modeling of geotechnical systems using two of the most advanced methods of analysis and modeling in engineering mechanics. The depth and breadth of such research training should be of significant value to geotechnical engineering practice.
边坡和路堤液化失稳破坏分析是岩土地震工程中的一个重要问题。虽然各种基于经验的和/或简化的方法已经开发并在实践中使用,但目前对可液化土壤应力-应变-强度行为的了解状况,近年来观测到的土壤边坡和路堤在最近地震中的响应的丰富,以及近年来工程结构数值模拟的重大进展,已经为更严格,但现实的,液化失稳与破坏的分析方法。该项目旨在开发一种多尺度方法,通过统一的本构模型来捕获破坏前和破坏后阶段的土壤响应。此外,由于用于土壤全耦合有效应力分析的传统有限元(FE)方法在处理岩土系统的破坏前后响应方面受到严重限制,因此提出了一种无网格方法来克服有限元方法的已知困难,并在液化分析的所有阶段产生可靠和稳健的解决方案。该项目的智力优势在于开发和引入了两种非常强大的土液化分析本构和数值方法。所提出的方法将在公共领域的开源代码中实现,可供研究人员和从业者使用。开发的计算工具将根据一系列关于土壤边坡和路堤响应的实验和现场观测进行验证和验证。该项目的广泛影响包括在其他工程领域(如生物孔隙力学和金属和合金的热轧工艺)中开发的技术的潜在应用。在这个项目中训练的研究生将有一个很好的机会来深入了解液化和液化引起的变形和破坏的机制,以及使用工程力学中最先进的两种分析和建模方法对岩土系统进行建模的专业知识。这种研究训练的深度和广度应该对岩土工程实践具有重要价值。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Majid Manzari其他文献
Majid Manzari的其他文献
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{{ truncateString('Majid Manzari', 18)}}的其他基金
Collaborative Research: Validation of Constitutive and Numerical Modeling Techniques for Soil Liquefaction Analysis
合作研究:土壤液化分析本构和数值建模技术的验证
- 批准号:
1635524 - 财政年份:2016
- 资助金额:
$ 23.47万 - 项目类别:
Standard Grant
NEESR Planning/Collaborative Research: Liquefaction Experiments and Analysis Projects (LEAP) for Validation
NEESR 规划/合作研究:用于验证的液化实验和分析项目 (LEAP)
- 批准号:
1344705 - 财政年份:2013
- 资助金额:
$ 23.47万 - 项目类别:
Standard Grant
A Group Travel Support to Participate in the 11th International Conference on Fracture; March 20-25, 2005; Turin, Italy
参加第十一届国际骨折会议的团体旅行支持;
- 批准号:
0503951 - 财政年份:2005
- 资助金额:
$ 23.47万 - 项目类别:
Standard Grant
Role of Strain Localization and Dilatancy on Deformation and Stability of Soil Slopes
应变局部化和剪胀对土坡变形和稳定性的作用
- 批准号:
9988557 - 财政年份:2000
- 资助金额:
$ 23.47万 - 项目类别:
Continuing Grant
Collaborative Research: Constitutive and Numerical Modeling for Analysis of Permanent Deformations of Soil Structures
合作研究:土体结构永久变形分析的本构模型和数值模型
- 批准号:
9802287 - 财政年份:1999
- 资助金额:
$ 23.47万 - 项目类别:
Standard Grant
Education and Research Equipment: A Six Degree of Freedom Shaking Table
教学科研设备:六自由度振动台
- 批准号:
9705084 - 财政年份:1997
- 资助金额:
$ 23.47万 - 项目类别:
Standard Grant
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