胡  凯，  倪建公，  朱惠德
    （中船第九设计研究院工程有限公司，上海 200063）

[摘要] 历次震害表明，地震作用下屋顶上的塔楼地震反应强烈，常发生严重破坏，产生显著的“鞭梢效应”。而通常的设计方法往往无法模拟此类效应。本文结合月星环球博览中心复杂高层公建项目，采用等效粘滞阻尼比来考虑顶部钢塔楼和主体结构不同的阻尼耗能特性，通过整体和局部模型的对比，分别从阻尼比、动力特性、基底反力、顶部位移、高阶振型等方面分别研究了非比例阻尼及“鞭梢效应”对高层混合结构顶部钢塔楼地震反应的影响，为今后同类项目的抗震设计提供一定的参考和依据。
[关键词] 混合结构；顶部塔楼；粘滞阻尼比；鞭梢效应；高阶振型
中图分类号：TU391    文献标识码：A  文章编号：1002-848X(2011) Sl-0825-04

    Analysis of the high-rise building with steel frame tower atop
    Hu Kai, Ni Jiangong, Zhu Huide
    ( China Slupbuilding NRDI Engineering Co., Ltd., Shanghai 200063, China)

Abstract: Previous seismic damages showed that, the steel frame tower built atop on the roof of high rises usually produced a dramaticuWluplash Effect"under eaIthquake, which cannot be simulated by conventional design methods. In this paper, by comparing the analysis results of the whiplash effect of the partial and whole models, the whiplash effect on the steel tower built atop on the high-rises was analysed, through the aspect of damping ratio, dynamic characteristic, base reaction, top displacement and lugh-order mode.  Meanwhile, this paper may also provide some references for related designs in the future.
Keywords: hybrid structure;tower built atop;viscous damping ratio;whiplash effect; high-order mode