Development of Intelligent Large-Scade Civil Engineering Structures.

最近的土建结构设计标准采用了更高水平的设计地震力。这种抗震设计要求的提高有时会给最先进的大型结构带来问题，因为它可能使合理的构件设计变得不可能。在某些情况下，这也导致了对现有结构抗震性能的改进要求。在本研究中，研究结构的动力响应控制作为一种减少地震反应的措施，特别强调了控制装置的性能要求，以及合适的控制算法，用于大跨度桥梁，核电站，海上浮动机场等结构。如何解决与控制装置在这些结构上的应用有关的问题，是人们主要关心的问题。取得了以下成绩：-提出了几种浮式结构的控制装置，并比较了系统在海浪激励下的控制效率。为了研究结构在塑性范围内的抗震性能，对几种控制装置的承载力进行了数值模拟。-详细研究了随机激励的相位特性以及振幅特性对具有响应控制装置的结构的影响。为了实时评估地震输入的非平稳性的影响，提出了一种控制算法。提出了一种估算结构相对于地面位移或海水粒子运动的动力响应振幅的方法。

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.