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Dynamic Response of an Axially-Loaded Pile: A Theoretical and Experimental Investigation

轴向加载桩的动态响应：理论和实验研究

基本信息

批准号：
8611267
负责人：
Ronald Pak
金额：
$ 15.44万
依托单位：
University of Colorado at Boulder
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：
1986-12-01 至 1989-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8611267&HistoricalAwards=false
关键词：
Dynamic Response Axially Loaded Pile

项目摘要

This research program addresses the dynamic response of a finite deformable pile embedded in a half space under harmonic axial loading. The problem will be formulated to yield a Fredholm integral equation of the second kind which can be solved with suitable Green's functions. The analytical results will be verified by performing scale model experiments in a centrifuge with overconsolidated clay and dry cohesionless sand. Because of the needs in the design of structures to accomodate dynamic loading due to causes other than earthquakes such as wind and machine loads, detailed knowledge of the structural response is necessary for both safty and economic reasons. While dynamic analysis of the structure is reasonably well established, the dynamic interaction between the soil and the foundation system is still open to question. The centrifuge experimental program has a potential to provide the necessary data base for the calibration and translation of the theoretical analysis into direct engineering applications. In addition, the investigation will provide an opportunity to examine closely the suitability of various proposed techniques on dynamic centrifuge modeling, which is still very much in its infancy. The experience gained in this investigation will reinforce and expand the current knowledge and technology on the applications of the centrifuge technique to important areas of soil dynamics.

本研究计划解决了有限的动态响应简谐轴力作用下半空间中的可变形桩加载中这个问题将被公式化以产生一个Fredholm 第二类积分方程，可以用合适的绿色函数。分析结果将是通过在离心机中进行比例模型实验来验证超固结粘土和干燥无粘性砂。由于结构设计中需要容纳由于地震以外的原因（如风）而产生的动荷载和机器载荷，结构响应的详细知识出于安全和经济的原因都是必要的。而动态结构的分析是合理的，土与地基系统之间的动力相互作用，仍有待商榷离心机实验计划有可能提供校准和翻译所需的数据库将理论分析转化为直接的工程应用。此外，调查将提供一个机会，仔细研究各种拟议技术的适用性，动态离心机建模，这仍然是非常在其婴儿期。这次调查中获得的经验将加强和扩大现有的知识和技术，离心机技术在重要领域的应用土壤动力学