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Development of Intelligent Large-Scade Civil Engineering Structures.

智能大尺度土木工程结构的发展。

基本信息

批准号：
07405023
负责人：
TOKI Kenzo
金额：
$ 13.76万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1998
项目状态：
已结题

项目摘要

A higher level of design seismic force is used in the recent design standards for the civil engineering structures. This enhancement of the seismic design requirement is occasionally problematic for the state-of-the-art large-scale structures since it can render the reasonable member design impossible. In some cases, it has also resulted in the requirement for improved seismic performance of existing structures. In this study, the dynamic response control of structures is investigated as a measure to reduce the seismic response, with particular emphasis on the clarification of the performance requirements for the control devices, and suitable control algorithm, for the application to the long-span bridges, nuclear power plants, off-shore floating airport structures etc. It is of main concern to develop the solution to the problems associated with the application of the control devices to those structures.The following achievements have been made.- Several types of control devices for floating structures are proposed, and the efficiency of the systems under the sea wave excitation is compared.- In order to investigate into the seismic performance of structures in the plastic range, numerical simulations are conducted with several control device capacity.- The influence of the phase characteristics of random excitation to the structures with response control devices is investigated in detail, as well as that of the amplitude characteristics. A control algorithm was derived in order to incorporate the real-time evaluation of the effect of the nonstationarity of the seismic input. A methodology to estimate the amplitude of the dynamic response of the structures relative to the ground displacement or the sea water particle motion is developed.

现行的土木工程结构设计标准中，对设计地震力的要求更高。这种抗震设计要求的提高有时会对最先进的大型结构造成问题，因为它可能导致不可能进行合理的构件设计。在某些情况下，这也导致了对现有结构的抗震性能的要求。本研究以结构动力反应控制为主要研究对象，着重探讨了控制装置的性能要求和控制算法，并将其应用于大跨度桥梁、核电站、表示“不，不海岸浮动机场结构等。主要关注的是开发与控制装置应用于这些结构相关的问题的解决方案。已经完成了提出了几种浮式结构物的控制装置，并比较了它们在海浪激励下的控制效果。为了研究结构在塑性范围内的抗震性能，对几种控制装置的性能进行了数值模拟。详细研究了随机激励的相位特性和幅值特性对带响应控制装置结构的影响。一个控制算法，以纳入地震输入的非平稳性的影响的实时评估。提出了一种估算结构相对于地面位移或海水质点运动的动力响应幅值的方法。