多维地震作用下巨型框架结构振动控制研究

Mega frame structure has great lateral stiffness and the strong whole work performance, which is one of the important development directions of modern structure technology. An urgent problem of using structure vibration control technology to reduce responses of mega frame structure under multi-dimensional earthquake has been found. The project is aimed at proposing a new mega frame sub structure system considering multi-dimensional isolation. The nonlinear spatial simplified model of the system and the response prediction and control are taken as the research objects. The research covers: The finite element numerical model of mega frame multi-dimensional isolation structure considering coupling effect will be established. The nonlinear spatial simplified model of the mega frame multi-dimensional isolation structure considering the coupling effect will be proposed. The influencing rules of the parameters and the spatial dynamic response characteristics of system will be studied. The design response spectrum and the seismic response prediction theory of the mega frame multi-dimensional isolation structure will be studied. The design method of the mega frame multi-dimensional isolation structure will also be established. The mega frame structure vibration control strategy of the theory and numerical analysis will be verified through shaking table test of the structure. The correlative researches of wind resistant reliability of the mega frame multi-dimensional isolation structure in the time domain and frequency domain will be studied. The dynamic response characteristic, failure mode and hybrid control theory and technology of mega frame multi-dimensional isolation structure system will also be studied.

巨型框架结构具有巨大抗侧刚度且整体工作性能强，是现代结构技术发展的重要方向之一，利用结构振动控制技术减轻巨型框架结构在多维地震作用下的响应是一项亟需解决的重要课题。本课题旨在提出考虑多维隔震的巨型框架-子结构新体系，并以该体系的非线性空间简化模型和响应预测及控制为研究对象，研究内容涵盖：建立考虑耦合效应的巨型框架多维隔震结构的有限元数值分析模型，提出考虑耦合效应的巨型框架多维隔震结构非线性空间简化模型，研究体系的空间动力响应特性及各参数影响规律；研究巨型框架多维隔震结构的设计反应谱及地震反应预测理论，研究巨型框架多维隔震结构体系的设计方法；通过缩尺地震模拟振动台试验研究巨型框架多维隔震结构的时域地震反应，验证理论和数值分析的巨型框架结构振动控制策略；进行时域和频域下巨型框架多维隔震结构抗风可靠性相关研究；研究在强震作用下巨型框架多维隔震结构体系动力响应特性、失效模式及混合控制理论、技术。

本课题提出了一种考虑多维隔震的巨型框架-子结构新体系，以该体系的简化模型、响应和控制为研究对象。建立了考虑耦合效应的巨型框架多维隔震结构的有限元数值分析模型；提出了巨型框架多维隔震结构简化模型；研究了结构体系的动力响应特性和参数影响规律；通过缩尺地震模拟振动台试验研究了巨型框架多维隔震结构的地震反应，验证了理论和数值分析的巨型框架结构模型；进行了巨型框架多维隔震结构抗风可靠性研究；研究了强震作用下巨型框架多维隔震结构体系碰撞效应及减震控制理论、技术。项目成果丰富，为巨型结构的振动控制提供了新思路和研究基础。