A New Method for Response Spectrum Superposition

响应谱叠加的新方法

• 批准号: 8705398
• 负责人: Mihailo Trifunac
• 金额: $ 3万
• 依托单位: University of Southern California
• 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: 1987-03-15 至 1988-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8705398&HistoricalAwards=false
• 关键词: New; Method; Response; Spectrum; Superposition

This project is undertaken under provisions in AD/ENG Bulletin No. 85- 25 for "Expedited Awards for Novel Research." The primary objective of the research is to complete the final development of a statistical response spectrum method for multi-degree of freedom systems. Currently, such problems can only be handled using approximations. The new method to be developed is powerful, accurate, and has a round theoretical basis following the work by Cartwright and Longuet-Higgins. The need to estimate the maximum response of multi-degree-of-freedom structures is evident as many spectrum estimation or superposition methods have been proposed. However, very few of them are established on sound physical basis and utilizing statistical theory which can account for the uncertainties in the results they produce. The proposed method is capable of evaluating the expected and most probable amplitude of local response peaks for each floor of a multi-story building. Computer runs will be made to test the numerical accuracy before the method can be fully documented, published, and introduced into practical applications. The work proposed would produce a method far superior to any of the existing methods. The expedited award mechanism is used to enable a uniquely qualified graduate student to complete the work while available. The Principal Investigator is one of the leaders in structural dynamics and ground motions. He has pioneered many important subjects in these areas. A one-year grant is strongly supported.

该项目是根据AD/ENG Bulletin No. 85-25的规定进行的，以“加快新研究奖”。 该研究的主要目的是完成用于自由系统多学位的统计响应谱法的最终开发。 当前，只能使用近似值来处理此类问题。 要开发的新方法是强大的，准确的，并且在Cartwright和Longuet-Higgins的工作之后具有圆形的理论基础。 由于已经提出了许多频谱估计或叠加方法，因此需要估计多度自由结构的最大响应。 但是，其中很少有基于物理的基础建立，并利用统计理论可以解释其产生的结果中的不确定性。 所提出的方法能够评估多层建筑物的每个楼层的局部响应峰的预期和最可能的幅度。 将进行计算机运行以测试数值准确性，然后才能将该方法充分记录，发布并介绍到实用应用中。 提出的工作将产生一种远比现有方法优越的方法。 加急奖励机制用于使一名独特的合格研究生能够在可用时完成工作。 主要研究者是结构动力和地面运动的领导者之一。 他率先在这些领域提出了许多重要主题。 一年的赠款得到了强烈的支持。