巨-子型控制结构体系在竖向地震作用下的反应分析  

Investigation of Vertical Seismic Responses of Mega-sub Controlled Structural System

作　　者：张洵安[1] 薛荣刚[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,陕西西安710072

出　　处：《郑州大学学报（工学版）》2005年第3期41-45,共5页Journal of Zhengzhou University（Engineering Science）

摘　　要：分析了竖向地震作用下巨-子型控制结构体系MSCSS(Mega_sub controlled structural system)的反应机理,提出了带附加柱的MSCSS.采用串并联质点系计算模型,对带附加柱与不带附加柱MSCSS进行了时程对比分析,计算结果表明:带附加柱与不带附加柱MSCSS相比,带附加柱MSCSS不仅可以在结构上解决巨型梁的大跨度问题,而且在竖向地震下具有较好的控制效果.基于随机振动复模态理论,采用非平稳地震动模型,进一步探讨了带附加柱MSCSS的子结构层数和巨(型)梁刚度等参数对结构反应的影响,研究表明子结构层数和巨(型)梁刚度等参数对带附加柱MSCSS巨型梁的位移和加速度响应的影响均十分显著.The response mechanism of the mega-sub controlled structural system with additional columns subjected to vertical seismic action is studied in this paper. The member analytical model is adopted in the research. A time history analysis is used to prove its controlling effectiveness in comparison with the mega-sub controlled structural system without additional columns. Based on the complex mode analysis theory of random vibration, the effects of sub-frame floor numbers and mega-beam stiffness on the responses of mega-sub controlled structural system with additional columns under the vertical non-stationary seismic action are presented. The results of the calculation show that the effects of sub-frame floor numbers and mega-beam stiffness on the responses of mega-sub controlled structural system with additional columns are very remarkable.

关 键 词：巨-子型控制结构体系 竖向地震 复模态理论 非平稳地震动 

分 类 号：TU311[建筑科学—结构工程]