Stochastic Response of Nonlinear Primary-Secondary Structural Systems to Earthquake Loading

非线性主次结构系统对地震荷载的随机响应

• 批准号: 8707792
• 负责人: Takeru Igusa
• 金额: $ 7万
• 依托单位: Northwestern University
• 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: 1987-08-01 至 1990-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8707792&HistoricalAwards=false
• 关键词: Stochastic; Response; Nonlinear; Primary; Secondary

Most civil engineering systems consist of a heavy primary structure supporting a light secondary system. Examples include piping containment vessels in nuclear reactors, and equipment such as computers in buildings. This research project considers those structural systems in which both the primary and the secondary systems behave in a nonlinear manner. It considers special characteristics of secondary systems such as: tuning; time-varying nonlinear effects including a decrease in stiffness of the structure; and the influence on the assessment of the reliability of the system due to uncertainty in the system parameters. The analysis of parameter uncertainty will be performed using methods of structural reliability theory. The results of this research can be used to assist and interpret the results obtained from experimental and time-history methods. In addition, the research can be developed further in the analysis of secondary systems, such as in developing damage criteria and system identification techniques and investigating more general and complex nonlinearities. Finally, the research can be extended in other areas including the analysis of structures subjected to narrow-band earthquakes - e.g. the September, 1985 Mexico earthquake.

大多数土木工程系统由一个沉重的主要结构组成 支持轻型二级系统。 示例包括管道 核反应堆中的安全壳以及计算机等设备 在建筑物中。 该研究项目考虑了这些结构系统，其中， 初级和次级系统以非线性方式工作。 它 考虑二次系统的特殊特性，如：调谐; 时变非线性效应，包括 结构;以及对可靠性评估的影响 由于系统参数的不确定性。 分析 参数不确定性将使用结构方法进行 可靠性理论 本研究的结果可以用来帮助和解释 结果从实验和时间历程的方法。在 此外，研究还可以在分析 次级系统，例如在制定损害标准和系统时， 鉴定技术和调查更一般和复杂 非线性 最后，本研究可以推广到其他领域 包括对受到窄带干扰的结构的分析 1985年9月墨西哥地震。