SGER: A Phase 1 Prediction of Dynamic Response of Spread Footings on Sand

SGER：沙上展开基础动态响应的第一阶段预测

• 批准号: 0537244
• 负责人: Dennis Hiltunen
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-11-01 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0537244&HistoricalAwards=false
• 关键词: SGER; Phase; Prediction; Dynamic; Response

A Phase 1 Prediction of Dynamic Response of Spread Footings on SandPI: Dennis R. Hiltunen, University of FloridaAbstract:Recent decades of research have produced significant advancements in both laboratory and in situ characterization of geotechnical sites, and in numerical methodologies for prediction of dynamic foundation behavior. Thus, two of the key components for calculating the dynamic response of footings have matured substantially. However, there is little recent information available to assess the quality of these new capabilities by way of comparisons between predicted and measured behavior in known conditions and under controlled loading. Furthermore, equipment to dynamically load full-scale foundations has not been easily available until the advent of the NEES Equipment Sites. Now, equipment capable of loading full-scale foundations is available, but is as yet untested for performance in a verification application.This research will be conducted as a NEES payload project. It will directly utilize NEES equipment and an existing NEESR project, CMS-0421275, "NEESR-II: In Situ Determination Of Soil Modulus And Damping As A Function Of Level Of Strain," G. Biscontin, PI. The plan is to instrument, load, and measure the dynamic response of three shallow foundations located on a site thoroughly categorized as part of the NEESR Award to Prof. Biscontin. In conjunction, class A predictions of dynamic foundation response will be made by a small group of contributors, and the predictions will be compared with measured performance. The results of the prediction event will be presented at a special session during an upcoming Geo-Institute conference, and published in a Geotechnical Special Publication. The prediction event will be part of a campaign to improve dynamic foundation design by bridging the gap between current theory and actual performance. By providing more robustly calibrated design tools, excess design and construction costs created by over conservatism can be reduced.The model verification afforded by the research provides a realistic opportunity for significant advances in engineering practice related to foundation dynamics. The showcasing of foundation dynamics via the prediction event and a proposed Geo-Institute session and publication provides a multi-faceted opportunity for education and outreach. The event is targeted at practicing engineers, but it is also expected that engineering faculty will work in concert with graduate and undergraduate students to develop predictions of expected foundation response.

SandPI 上展开基础动态响应的第一阶段预测：Dennis R. Hiltunen，佛罗里达大学摘要：最近几十年的研究在岩土工程场地的实验室和现场表征以及预测动态基础行为的数值方法方面取得了重大进展。 因此，计算基础动态响应的两个关键组件已经相当成熟。 然而，最近几乎没有信息可以通过比较已知条件和受控负载下的预测行为和测量行为来评估这些新功能的质量。 此外，在 NEES 设备站点出现之前，动态加载全尺寸基础的设备并不容易获得。 现在，能够装载全尺寸地​​基的设备已经可用，但尚未在验证应用中进行性能测试。这项研究将作为 NEES 有效载荷项目进行。 它将直接利用 NEES 设备和现有的 NEESR 项目 CMS-0421275，“NEESR-II：现场测定土壤模量和阻尼作为应变水平的函数”，G. Biscontin，PI。 该计划旨在对位于场地上的三个浅基础进行动态响应检测、加载和测量，该场地被彻底归类为 Biscontin 教授获得的 NEESR 奖的一部分。 同时，一小组贡献者将做出动态基础响应的 A 类预测，并将预测与测量的性能进行比较。 预测活动的结果将在即将召开的地质研究所会议期间的特别会议上公布，并在岩土工程特别出版物上发布。 该预测活动将成为通过缩小当前理论与实际性能之间的差距来改进动态基础设计活动的一部分。 通过提供更稳健的校准设计工具，可以减少因过度保守而产生的额外设计和施工成本。该研究提供的模型验证为与基础动力学相关的工程实践的重大进步提供了现实的机会。 通过预测活动以及拟议的地理研究所会议和出版物展示基金会动态，为教育和推广提供了多方面的机会。 该活动针对的是执业工程师，但也预计工程学院将与研究生和本科生合作，对预期的基金会反应做出预测。