Collaborative Research: Full Size Experiments and Centrifuge Physical Models of Pile Foundations Subjected to Lateral Spreading: Comparative Study and Engineering Interpretation

合作研究：横向扩展桩基的全尺寸试验和离心机物理模型：比较研究和工程解释

• 批准号: 0200510
• 负责人: Ahmed Elgamal
• 金额: $ 22万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0200510&HistoricalAwards=false
• 关键词: Collaborative; Research; Full; Size; Experiments

This research effort aims to study experimentally the effect of earthquake-induced lateral spreading due to liquefaction on pile foundations, both in full size and centrifuge model conditions. Comparable tests of instrumented single piles and pile groups embedded in 1-and 2-layer soil profiles will be conducted in slightly inclined laminar boxes subjected to base shaking at three facilities: 1) The 100g-ton geotechnical centrifuge, laminar box and in-flight shaker at RPI, 2) The 6m high laminar box and 1g shaking table at NIED, Japan (largest laminar box in the world), and 3) the 1.9m high laminar box and 1g shaking table at UCSD (largest laminar box in the US). Taking advantage of the successful experience at RPI in this kind of testing, this research constitutes the first opportunity for direct comparison of results in controlled experimental environments between centrifuge and full sized tests to be conducted at NIED. Additionally, centrifuge and full size NIED results will be used to validate the medium-size experiments to be performed using the UCSD shaking table and laminar box. Advanced data analysis techniques-including system identification and visualizations-will be used to process and compare the results from the three facilities, with engineering interpretations and computer simulations.

本研究旨在通过实验研究在全尺寸和离心模型条件下由于液化对桩基造成的地震引起的横向扩展的影响。 埋入 1 层和 2 层土剖面中的仪表化单桩和桩群的对比试验将在三个设施的轻微倾斜的层流箱中进行，这些层流箱经受基础振动：1）RPI 下的 100 克吨土工离心机、层流箱和飞行振动台，2）日本 NIED 的 6m 高层流箱和 1g 振动台（日本最大的层流箱） 世界），3）UCSD 的 1.9m 高层流箱和 1g 振动台（美国最大的层流箱）。 利用 RPI 在此类测试中的成功经验，本研究首次有机会在受控实验环境中直接比较 NIED 进行的离心机和全尺寸测试的结果。 此外，离心机和全尺寸 NIED 结果将用于验证使用 UCSD 摇床和层流箱进行的中等规模实验。 先进的数据分析技术（包括系统识别和可视化）将用于处理和比较三个设施的结果，并进行工程解释和计算机模拟。