Prediction of Soil Liquefaction in Centrifuge Model Tests

离心机模型试验中土壤液化的预测

• 批准号: 9120215
• 负责人: Kyran Mish
• 金额: $ 2万
• 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: 1992
• 资助国家: 美国
• 起止时间: 1992-01-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9120215&HistoricalAwards=false
• 关键词: Prediction; Soil; Liquefaction; Centrifuge; Model

This action is in response to the NSF Announcement of Program Initiative No. 91-55: "The 'Class A' Prediction Phase of the VELACS (Verification of Liquefaction Analysis by Centrifuge Studies) Project". VELACS is an NSF-funded coordinated study of the effect of simulated earthquake loading on a variety of model geotechnical structures, such as earth dams and embankments, in order to investigate the mechanisms of liquefaction-induced failure, and to acquire data for the verification of the various analysis procedures for the liquefaction problem. The experiments are run on the geotechnical centrifuges at the California Institute of Technology, University of California at Davis, University of Colorado at Boulder, Rensselaer Polytechnic Institute, Princeton University and Cambridge University, England. The "Class A" prediction phase of the VELACS project involves making analytical/computational predictions before the experiments are performed; then the experiments are run, and the measured results compared with the predictions. "Class A" predictions are analogous to "single-blind" studies in medical research. A workshop, scheduled to be held at the University of California, Davis, in September, 1993, will compare the predictions to the experimental results, and conclusions will be drawn regarding the effectiveness of the analytical/computational methods used. Sixteen research groups from around the world (nine in the U.S.; one in Canada; three in Japan; and three in the U.K.) are participating in this prediction exercise. This study at the University of California, Davis is examining the effectiveness of the DYSAC2 computer code for liquefaction analysis.

此行动是为了响应 NSF 计划倡议公告第 91-55 号：“VELACS（离心机研究液化分析验证）项目的‘A 级’预测阶段”。 VELACS 是一项由 NSF 资助的协调研究，旨在研究模拟地震荷载对土坝和路堤等各种模型岩土结构的影响，以研究液化引起的破坏机制，并获取数据以验证液化问题的各种分析程序。 这些实验在加州理工学院、加州大学戴维斯分校、科罗拉多大学博尔德分校、伦斯勒理工学院、普林斯顿大学和英国剑桥大学的土工离心机上进行。 VELACS 项目的“A 类”预测阶段涉及在实验进行之前进行分析/计算预测；然后进行实验，并将测量结果与预测进行比较。 “A 级”预测类似于医学研究中的“单盲”研究。 定于 1993 年 9 月在加州大学戴维斯分校举行的研讨会将比较预测与实验结果，并就所用分析/计算方法的有效性得出结论。 来自世界各地的 16 个研究小组（9 个在美国、1 个在加拿大、3 个在日本、3 个在英国）正在参与这项预测工作。 加州大学戴维斯分校的这项研究正在检验 DYSAC2 计算机代码用于液化分析的有效性。