Site-Response, Soil Liquefaction, and Soil-Pile Interaction Using a Geotechnical Centrifuge

使用岩土离心机进行场地响应、土壤液化和土-桩相互作用

• 批准号: 8603525
• 负责人: Ronald Scott
• 金额: $ 8.68万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-10-15 至 1989-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8603525&HistoricalAwards=false
• 关键词: Site; Response; Soil; Liquefaction; Pile

The aim of this research project is to investigate (1) the effect of ground motion on ground response, including earthquake motions sufficiently severe to induce liquefaction and (2) the associated soil- pile interaction effects in liquefied soil deposits. Loose and dense sand and salt samples will be subjected to horizontal shaking similar to recorded earthquake accelerograms. Instrumented model piles and pile groups will be installed in the saturated soil for the study of dynamic soil-pile interaction. The models will be tested in the geotechnical centrifuge at the California Institute of Technology, and the model tests will simulate a prototype soil deposit with a depth of approximately 100 feet and subjected to ground accelerations in the range .05 to 0.5g. The objective of these tests is to determine: (1) the effects of strain levels on ground motions, (2) the ability of existing theories to predict the observed linear and nonlinear soil behavior, and (3) the conditions that lead to liquefaction and large permanent ground displacements. The realization of these objectives will contribute significantly to current procedures for assessing ground failure due to liquefaction as well as to the methods used to design piles in offshore areas located in seismic environments. Professor Scott is internationally recognized in this area of research and has the institutional facilities available to conduct the research. It is recommended that this request for support be approved.

本研究的目的是调查（1） 地面运动对地面反应的影响，包括地震运动 严重到足以引起液化;（2）相关土壤- 液化土沉积物中桩的相互作用效应。 松散和致密的砂和盐样品将接受水平测试。 与记录的地震加速度图相似的震动。 仪表化 模型桩和群桩将安装在饱和土中， 桩土动力相互作用的研究。 这些模型将被测试 在加州研究所的土工离心机中 模型试验将模拟原型土壤存款 大约100英尺深， 加速度范围为0.05至0.5g。 这些试验的目的是确定：（1）应变的影响 水平的地面运动，（2）现有的理论， 预测观测到的线性和非线性土壤行为，以及（3） 导致液化和大型永久性地面的条件 流离失所。 实现这些目标将有助于 对评估接地故障的现行程序而言， 液化以及用于设计海上桩的方法 位于地震环境中。 斯科特教授在这一领域的研究是国际公认的 并拥有进行研究的机构设施。 建议核准这一支助请求。