Design of Offshore Steel Platforms for Earthquakes and Waves

海上地震和海浪钢平台设计

• 批准号: 8418224
• 负责人: Chi Tung
• 金额: $ 9.75万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-02-15 至 1987-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8418224&HistoricalAwards=false
• 关键词: Design; Offshore; Steel; Platforms; Earthquakes

The project is formulated to develop response spectrum techniques for analysis and design of offshore steel platforms subjected to earthquake and wave excitations. Unlike conventional structures, offshore structures are surrounded by water; the interaction between the structure and water gives rise to added mass and hydrodynamic damping. Furthermore, because of the existence of the relative magnitude of inertia and drag forces associated with either earthquakes or wave actions, the manner in which the response spectra are affected is investigated. For earthquake loading, the importance of a nonlinear drag term on structural response for an entire range of structural characteristics is examined. For wave loading, a narrow-based wave model is used as a first approximation. The study will lead to a rational framework for the design of offshore structures based on the concept of a response spectrum.

本项目旨在发展反应谱技术， 地震作用下海洋钢平台的分析与设计 和波激发。 与传统结构不同， 建筑物被水包围;建筑物之间的相互作用 结构和水产生附加质量和流体动力阻尼。 此外，由于存在的相对大小， 与地震或波浪有关惯性力和拖曳力 作用，反应谱受影响的方式是 研究了 对于地震荷载， 整个结构范围内结构响应的阻力项 特征进行了检查。 对于波浪载荷，窄基波浪 模型被用作第一近似。这项研究将导致一个 海洋结构物设计的合理框架， 反应谱的概念。