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: 1635307
• 负责人: Bruce Kutter
• 金额: $ 43.61万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1635307&HistoricalAwards=false
• 关键词: Collaborative; Research; Validation; Constitutive; Numerical

Soil liquefaction is a pervasive problem during earthquakes that has caused significant and costly damage to civil infrastructure in the US and other parts of the world. Practicing engineers and academics have been using computational models and numerical simulation tools in the design and analysis of geosystems involving liquefiable soils. These tools are highly sophisticated and refined, but they often have been revised following many major past earthquakes to incorporate the lessons learned from post-event observations and investigations. Thus, the validity of these tools is yet to be fully established. The Liquefaction Experiments and Analysis Projects (LEAP) is an international collaboratory to produce a set of high quality experimental data using centrifuge testing, and then to use these data to establish the validity and range of applicability of existing computational models and simulation procedures for soil liquefaction analysis. The collaboratory includes centrifuge facilities at the University of California at Davis, Rensselaer Polytechnic Institute, Cambridge University (UK), Kyoto University (Japan), NCU (Taiwan), Zhejiang University (China), IFSTTAR (France), KAIST and KWater (Korea), and HKUST (Hong Kong). The project leverages the experimental resources at these facilities to complement the testing capabilities in the participating US institutions for investigating a number of challenging problems in which soil liquefaction plays a prominent role.Three consecutive projects (LEAP-2017, -2018, and -2019) are planned which will be used to address three important issues: reproducibility and uncertainty; effects of soil fabric; and effects of biaxial ground motion on soil liquefaction. LEAP-2017 will use improved quality control measures to minimize uncertainties, and an extensive testing program will be designed and conducted to characterize the sensitivity and uncertainty for relatively simple lateral spreading centrifuge tests. LEAP-2018 will produce high quality centrifuge data to enable the assessment of the applicability of computational tools for predicting the influence of fabric and layering. LEAP-2019 will assess the performance of numerical tools against a series of biaxial shaking centrifuge experiments using synthetic and real earthquake motions. Following each LEAP, a workshop will be held to discuss the results of experiments and numerical simulations. The data resulting from this project will be organized, archived and publically released using a new database publication mechanism. The organized data will be useful for (1) future validation efforts, (2) other ongoing liquefaction research, and (3) in geotechnical modeling education. A number of graduate students are involved in the project and will receive unique training opportunities beyond the capabilities of any one institution alone. A Validation Driver Framework (VDF) will be developed to allow modelers as well as practitioners to efficiently validate their codes.

土壤液化是地震期间普遍存在的问题，对美国和世界其他地区的民用基础设施造成了重大且代价高昂的破坏。 实践工程师和学者一直在使用计算模型和数值模拟工具来设计和分析涉及可液化土壤的地球系统。 这些工具非常复杂和完善，但在过去的许多重大地震之后，它们经常被修改，以纳入从事件后观察和调查中吸取的经验教训。 因此，这些工具的有效性尚未完全确定。 液化实验和分析项目（LEAP）是一个国际合作组织，旨在通过离心机测试产生一组高质量的实验数据，然后使用这些数据来确定现有土壤液化计算模型和模拟程序的有效性和适用范围分析。 该合作机构包括加州大学戴维斯分校、伦斯勒理工学院、剑桥大学（英国）、京都大学（日本）、NCU（台湾）、浙江大学（中国）、IFSTTAR（法国）、KAIST 和 KWater（韩国）的离心机设施）和香港科技大学（香港）。 该项目利用这些设施的实验资源来补充美国参与机构的测试能力，以调查土壤液化在其中发挥突出作用的许多具有挑战性的问题。连续三个项目（LEAP-2017、-2018和-2019）计划用于解决三个重要问题：再现性和不确定性；土壤结构的影响；以及双轴地震动对土壤液化的影响。 LEAP-2017将使用改进的质量控制措施来最大程度地减少不确定性，并将设计和实施广泛的测试计划来表征相对简单的横向扩散离心机测试的灵敏度和不确定性。 LEAP-2018 将产生高质量的离心机数据，以评估计算工具在预测织物和分层影响方面的适用性。 LEAP-2019 将使用合成和真实地震运动来评估数值工具针对一系列双轴振动离心机实验的性能。 每次 LEAP 之后，都会举办一次研讨会来讨论实验和数值模拟的结果。 该项目产生的数据将使用新的数据库发布机制进行组织、存档和公开发布。 组织好的数据将有助于 (1) 未来的验证工作，(2) 其他正在进行的液化研究，以及 (3) 岩土建模教育。许多研究生参与了该项目，并将获得超出任何一所机构单独能力的独特培训机会。 将开发验证驱动程序框架（VDF），以允许建模者和从业者有效地验证他们的代码。

项目成果

LEAP-UCD-2017 Comparison of Centrifuge Test Results

• DOI: 10.1007/978-3-030-22818-7_4
• 发表时间: 2019
• 作者: B. Kutter;T. Carey;N. Stone;B. L. Zheng;Andreas G. Gavras;M. Manzari;M. Zeghal;T. Abdoun;E. Korre;S. Escoffier;S. Haigh;G. Madabhushi;S. Madabhushi;W. Hung;Ting-Wei Liao;Dong‐Soo Kim;Seong-Nam Kim;J. Ha;N. Kim;M. Okamura;Asri Nurani Sjafruddin;T. Tobita;K. Ueda;Ruben R. Vargas;Yan-Guo Zhou;Kai Liu

Sensitivity analysis of LEAP soil liquefaction tests

LEAP土壤液化试验灵敏度分析

• 发表时间: 2019
• 期刊: 7th lnternational Conference on Earthquake Geotechnical Engineering
• 作者: Zeghal, M;Goswami, N;Manzari, M;Kutter, B.
• 通讯作者: Kutter, B.

A new procedure for tracking displacements of submerged sloping ground in centrifuge testing

离心机测试中跟踪水下斜坡地面位移的新程序

• 发表时间: 2018
• 期刊: Physical Modelling in Geotechnics – McNamara et al. (Eds
• 作者: Carey, T.;Stone, N.;Kutter, B.;Hajialilue-Bonab, M.
• 通讯作者: Hajialilue-Bonab, M.

Measuring vertical displacement using laser lines and cameras

使用激光线和相机测量垂直位移

• DOI: 10.1680/jphmg.21.00038
• 发表时间: 2021
• 期刊: International Journal of Physical Modelling in Geotechnics
• 影响因子: 1.9
• 作者: Sinha, Sumeet Kumar;Kutter, Bruce Lloyd;Ziotopoulou, Katerina
• 通讯作者: Ziotopoulou, Katerina

Archiving of Experimental Data for LEAP-UCD-2017

LEAP-UCD-2017 实验数据存档

• DOI: 10.1007/978-3-030-22818-7_5
• 发表时间: 2020
• 期刊: Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading: LEAP-UCD-2017
• 作者: Bruce L. Kutter, Trevor J.