Interaction Effects on Pile-Supported Structure Subject to Severe Ground Motion

剧烈地震动作用下桩基结构的相互作用效应

• 批准号: 9003407
• 负责人: Phillip Gould
• 金额: $ 5万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1992-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9003407&HistoricalAwards=false
• 关键词: Interaction; Effects; Pile; Supported; Structure

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. This project studies one particular structure which faired remarkably well amidst similar buildings which suffered considerable damage during the earthquake. The Clarion Hotel complex is located in a region where high ground accelerations were measured due to the soft soil conditions near the San Francisco Airport. Interaction of the heavily reinforced pile foundation with the soil medium is suspected to have provided beneficial effects by mobilizing radiation and hysteretic damping. In addition, the pile flexibility may have provided a longer period than present in a fixed base structure. The effects of soil-pile-structure interaction on the performance of a portion of the hotel will be investigated using a complex response analysis in the frequency domain and a nonlinear time history analysis. The analysis utilizes and extends a methodology developed earlier to focus on interaction effects in an actual case. Important results expected include a comparison of the forces acting in the building and foundation elements as computed from the interactive and fixed base models, and an assessment of the period shift produced by pile flexibility.

这是1989年10月洛马普列塔地震后的一次地震。 从这一破坏性事件中吸取教训的调查项目。 本项目研究一种特殊的结构， 在遭受损失的类似建筑中表现得非常好 在地震中造成了很大的损失。 克拉里昂 酒店综合体位于一个地区， 由于软土条件， 在旧金山弗朗西斯科机场附近。 重金属的相互作用 土介质加筋桩基础， 被怀疑通过动员 辐射和滞后阻尼。 此外，桩 灵活性可能提供了比现在更长的时间 在固定的基础结构中。 土-桩-结构相互作用对桩-土相互作用的影响 将对酒店的一部分进行调查 使用频域中的复响应分析 以及非线性时程分析。 分析 利用并扩展了以前开发的方法， 关注实际案例中的互动效果。 预期的重要结果包括： 作用在建筑物和基础构件上的力， 根据交互式和固定基础模型计算，以及 对堆产生的周期变化的评估 灵活性.