Seismic Behavior of Unanchored Liquid Storage Tanks

非锚固液体储罐的抗震性能

• 批准号: 8706781
• 负责人: Medhat Haroun
• 金额: $ 13.47万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-01 至 1990-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8706781&HistoricalAwards=false
• 关键词: Seismic; Behavior; Unanchored; Liquid; Storage

The seismic behavior of ground-based liquid storage tanks under horizontal and vertical excitations has received considerable attention in the past two decades; however, most of these studies dealt only with the behavior of anchored tanks. Few attempts were made to analyze the complex behavior of unanchored tanks and models sought were either too simple to capture the basic response of such structures or too complicated by modeling many features at once. It is believed that the behavior of the bottom plate is a dominant factor in the analysis of the overall system. Also, based on past experimental tests, liquid sloshing has a more pronounced effect on the response of unanchored than anchored tanks. This research will conduct a comprehensive study to analyze the seismic response of unanchored tanks. The study consists of both theoretical and experimental investigations, and is divided to three major phases: 1. Nonlinear static and dynamic analyses of the response of the bottom plate of the tank under uplifting forces taking into account its nonlinear contact with the foundation, its large deformations, its inelastic response, its interaction with the underlying soil and its behavior under impact; 2. An analysis of the nonlinear response of the liquid, and an evaluation of the corresponding hydrodynamic pressures; and 3. An analysis of the coupled response of the shell, the liquid and the bottom plate under moderate to severe earthquake motions. The research will provide a comparison between theoretical results and observed experimental data to assess the accuracy and the reliability of the predicted response.

在过去的二十年中，地面液体储罐在水平和垂直激发下的地震行为受到了极大的关注。但是，这些研究中的大多数仅处理锚固坦克的行为。 很少有尝试分析未经常规坦克的复杂行为，而所寻求的模型要么太简单，要么通过一次建模许多功能来捕获此类结构的基本响应，要么太复杂了。 人们认为，底板的行为是整体系统分析的主要因素。 同样，基于过去的实验测试，液体倾斜对与锚固罐相比，对未经常规的响应具有更明显的影响。 这项研究将进行一项全面的研究，以分析未锚定储罐的地震反应。 该研究包括理论和实验研究，分为三个主要阶段：1。在升起的力量下，坦克底部板底板的反应的非线性静态和动态分析考虑了其非线性与基础的非线性接触，其较大的变形，其弹性反应，其无弹性响应，其与下层的土壤及其在影响下的行为相互作用； 2。对液体的非线性反应的分析，以及对相应流体压力的评估；和3。对壳，液体和底部板的耦合响应的分析。 该研究将在理论结果和观察到的实验数据之间进行比较，以评估预测响应的准确性和可靠性。