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陳道政  李愛群?。|南大學(xué)土木工程學(xué)院  南京　210096）

[提要]  對(duì)高樓頂加鋼塔這一結(jié)構(gòu)形式的計(jì)算方法進(jìn)行總結(jié)，并指出它們的實(shí)用范圍。通過特例說明當(dāng)高樓
頂鋼結(jié)構(gòu)塔樓的基本頻率與整體結(jié)構(gòu)的固有頻率相同或相近，且與地面擾頻接近時(shí)，最易發(fā)生共振。經(jīng)計(jì)算分析，總結(jié)出便于工程應(yīng)用的簡(jiǎn)單計(jì)算公式，可供高樓頂鋼塔計(jì)算和設(shè)計(jì)時(shí)參考。并結(jié)合工程實(shí)例，給出了高樓加高塔的設(shè)計(jì)計(jì)算建議。
[關(guān)鍵詞]  高層建筑  塔樓 鋼結(jié)構(gòu)  鞭鞘效應(yīng)  抗震設(shè)計(jì)  放大系數(shù)

All kinds of calculating methods on steel tower atop building are discussed and their applicable ranges are given. Earth-quake effects amplification coefficient of steel tower is obtained from dynamics equation. It is introduced that whiplash effect can occur when the fundamental frequency of steel tower equals to the natural frequency of the monolithic structure containing main part and prominent part,or the frequenc\r nearly equals to the earthquake frequency. Simple formula based on the mathematical analysis is given. The formula can be easily applied to the calculation and design of high steel tower atop tall building. Suggestions on design of high steel tower atop tall building are recommended.
Keywords:  tall building; tower; steel structure; whiplash effect; amplification coefficient; aseismic design

   
    參  考  文  獻(xiàn)
  1．鐘萬勰，林家浩. 高層建筑振動(dòng)的“鞭鞘效應(yīng)”振動(dòng)與沖擊，1985，(2)．
  2．何益斌．屋頂增設(shè)鐵塔后原有結(jié)構(gòu)抗震性能分析．建筑結(jié)構(gòu)，1999，(3)．
  3．顧祥林等．舊房屋頂增建鐵塔后結(jié)構(gòu)的抗震性能分析，工程抗震，1996，(2)．
  4．曲淑英等．高層結(jié)構(gòu)的鞭鞘效應(yīng)分析．工業(yè)建筑，2001，(10)．
  5．東南大學(xué)土木工程學(xué)院等．江蘇電網(wǎng)調(diào)度大樓頂樓塔樓的地震作用分析報(bào)告2001．
  6．程季達(dá)，俞嘉聲，瞿偉廉．高層建筑頂部突出物的地震反應(yīng)分析．地震學(xué)刊，1987，(1)．
  7.  Kimura E.Earthquake-proof design of telecommunication building. JTR,13,1,1971.
  8.  Kimura E, Konno T.  Earthquake effects on steel tower for microwave antennas atop building. Review of The Electrical Communication Laboratories, 1975, 23( 3-4)
  9．東南大學(xué)土木工程學(xué)院，冶金部建筑研究總院設(shè)計(jì)院．西安長(zhǎng)慶石油勘探局科研樓鋼結(jié)構(gòu)塔樓減振研究報(bào)告．2001．
10．張相庭．高層建筑抗風(fēng)抗震設(shè)計(jì)計(jì)算．同濟(jì)大學(xué)出版社，1997．