(1 西北工业大学，西安 710072；2 煤炭工业部西安设计研究院，西安 710054)

［摘要］研究子结构刚度对巨子型有控结构位移响应的影响。结合刚度变化研究附加阻尼对巨子型有控结构的影响规律，并分析附加阻尼在巨子型有控结构中的作用。结合12种场地工况研究巨子型有控结构减震性能对地震激励的适应性。结果表明：附加阻尼可以改进子结构动力性能，确保巨子型有控结构在更宽的激励频率范围内工作，且将巨、子结构的侧移响应进一步降低；子结构刚度越小，附加阻尼对巨子型有控结构的影响越大；巨子型有控结构中，附加阻尼存在优化区间；子结构刚度对优化区间影响不大；装有附加阻尼的巨子型有控结构相比于未安装附加阻尼前，对子结构侧移控制率可达81.9%，对巨结构侧移控制率可达71.5%；巨结构侧移响应控制率对场地条件具有很好的适应性。

［关键词］巨子型有控结构；随机振动；复模态分析；调谐减振原理

Investigation on dynamic performance of the mega-sub controlled frame under horizontal earthquake

Lian Yeda1, Zhang Xunan1, Wang Zhaoxia2

(1 Northwestern Polytechnical University, Xian 710072, China;

2 Xian Institute of Coal Industrial Department, Xian 710054, China)

Abstract:The effect of the sub-structure stiffness on the dynamic performance of the mega-sub controlled frame was investigated. Effect rules of the additional damping to the mega-sub controlled frame with different sub-stuctural stiffness were researched, and the function of the additional damping in the mega-sub controlled frame was examined. Results show that the additional damping can improve the sub-structure dynamic performance, and ensure the mega-sub controlled frame to exert its self-control function, and further reduce the displacement of the mega-structure and the sub-structure. Optimized additional damping exits in the mega-sub controlled frame, and it is scarcely affected by the change of the sub-structure stiffness. Control ratio of the mega-sturcture displacement can be adapted to all kinds of sites well.

Keywords:mega-sub controlled frame; random vibration; complex modal analysis; tuned vibtation-absorption theory

国家自然科学基金(51078311)，西北工业大学科技创新基金资助(M450211)。

作者简介：连业达，博士，Email:lianyeda@163.com。

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