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

大多数土木工程系统都是由一个较重的初级结构支撑一个较轻的次级结构组成的。例子包括核反应堆中的管道密封容器，以及建筑物中的计算机等设备。本研究项目考虑了那些主要和次要体系都以非线性方式表现的结构体系。它考虑了二次系统的特殊特性，如：调谐；时变非线性效应，包括结构刚度的降低；以及系统参数的不确定性对系统可靠性评估的影响。参数不确定性分析将采用结构可靠度理论的方法进行。本研究结果可用于辅助和解释实验方法和时程方法的结果。此外，该研究还可以在二次系统的分析中进一步发展，例如在制定损伤准则和系统识别技术以及研究更一般和复杂的非线性方面。最后，这项研究可以扩展到其他领域，包括受窄带地震影响的结构分析，例如1985年9月的墨西哥地震。

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.