Forced Vibration Tests of the Foundation and Surrounding Soil at the NEES Large High Performance Shake Table

在 NEES 大型高性能振动台上对地基和周围土壤进行强制振动试验

基本信息

  • 批准号:
    0301785
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2003
  • 资助国家:
    美国
  • 起止时间:
    2003-06-01 至 2008-02-29
  • 项目状态:
    已结题

项目摘要

This action is to support forced vibration tests of the reinforced concrete foundation block and of the soils in the vicinity of the National Earthquake Engineering Simulation (NEES) Large High-Performance Shake Table at Camp Elliott, University of California-San Diego. The objective is to obtain fundamental information on the concept of using soil stiffness and radiation damping to reduce the necessity for extremely massive and deeply embedded foundations to resist dynamic and static loading.The tests will be conducted upon completion of the excavation for the foundation and the adjacent soil pits, and again, after completion of the reinforced concrete foundation block. This will be done in collaboration with researchers associated with the NEES Field Testing Facility at UCLA and with the Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (CICESE), Ensenada, Mexico. In the initial tests, eccentric mass shakers will be placed at the bottom of the excavations for the foundation block of the shake table and for the foundation of the adjacent equipment building. Measurements will be made of the dynamic response at dense arrays on the cavities for the foundations, on the adjacent soil pit and on the ground surface up to a distance of 200 meters. The tests will be repeated after the foundation block for the shake table and the foundation for the equipment building have been completed.The first objective of the project is to take advantage of limited time-windows to obtain dynamic ground motion data and, by inference, geotechnical data to be used in the development of a virtual model of the complete NEES Large High-Performance Shake Table facility at Camp Elliott. The second objective is to validate a new design approach for foundations subjected to impact loads that use soil stiffness and radiation damping to substitute for part of the foundation block, leading to a more economical installation. If fully validated, this approach, which takes advantage of advances in analysis of dynamic soil-foundation interaction, will result in significant savings.The project will play an important role in efforts to model the seismic and vibration response of structures in dense urban environments. The project will provide a unique training opportunity for undergraduate and graduate. students, will be useful in integrating the results of research into undergraduate and graduate courses on geotechnical and earthquake engineering, and will test the tele-observation capabilities from the UCSD NEES site at Camp Elliott.
这一行动是为了支持在加州大学圣地亚哥分校艾略特营地的国家地震工程模拟(NEES)大型高性能振动台附近的钢筋混凝土基础块和土壤的强制振动试验。目的是获得关于利用土壤刚度和辐射阻尼来减少超大质量和深埋基础抵抗动静态载荷的必要性的概念的基本信息。试验将在基础和邻近土坑开挖完成后进行,并在钢筋混凝土基础块完成后再次进行。这项研究将与加州大学洛杉矶分校NEES现场测试设施的研究人员以及墨西哥恩塞纳达的恩塞纳达高等教育科学调查中心(CICESE)合作完成。在初始试验中,将在基坑底部放置偏心质量振动筛,用于振动台的基础块和相邻设备建筑的基础。在200米的距离内,将对地基空腔、邻近的土坑和地面上密集排列的动态响应进行测量。试验将在振动台基础块和设备建筑基础完成后重复进行。该项目的第一个目标是利用有限的时间窗口来获取动态地面运动数据,并通过推断,将岩土技术数据用于开发完整的NEES大型高性能振动台设施的虚拟模型。第二个目标是验证一种新的设计方法,用于受冲击载荷影响的基础,该方法使用土壤刚度和辐射阻尼来替代部分基础块,从而实现更经济的安装。如果得到充分验证,这种方法利用了动态地基相互作用分析的先进技术,将大大节省成本。该项目将在模拟密集城市环境中结构的地震和振动响应方面发挥重要作用。该项目将为本科生和研究生提供独特的培训机会。这将有助于将研究成果整合到岩土工程和地震工程的本科和研究生课程中,并将测试加州大学圣地亚哥分校位于艾略特营的NEES站点的远程观测能力。

项目成果

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J Luco其他文献

J Luco的其他文献

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{{ truncateString('J Luco', 18)}}的其他基金

Analysis of the Seismic Response of the Jualien Containment Model
花莲安全壳模型地震响应分析
  • 批准号:
    9528057
  • 财政年份:
    1995
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Blind Prediction of the Response of the Hualien Model to Forced Vibration Tests
花莲模型对受迫振动试验响应的盲预测
  • 批准号:
    9315680
  • 财政年份:
    1993
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Soil-Structure Interaction Under Spatially Varying Ground- motion
空间变化地面运动下的土壤-结构相互作用
  • 批准号:
    8312441
  • 财政年份:
    1983
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Response of Three-Dimensional Structures to Non-Vertically Incident Seismic Waves
三维结构对非垂直入射地震波的响应
  • 批准号:
    7900006
  • 财政年份:
    1979
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Dynamic Response of Three-Dimensional Rigid Foundations
三维刚性地基的动力响应
  • 批准号:
    7622632
  • 财政年份:
    1977
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

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