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     婁  宇  王紅慶  陳義明
    （中國(guó)電子工程設(shè)計(jì)院 北京 100840）

[提要]  結(jié)合兩個(gè)算例的分析，提出了大底盤(pán)上雙塔樓高層建筑和大底盤(pán)上雙塔連體高層建筑同一振型有兩種振動(dòng)表現(xiàn)形式的結(jié)構(gòu)振動(dòng)概念，探討了這類(lèi)高層建筑結(jié)構(gòu)抗震分析時(shí)計(jì)算振型數(shù)的選取原則，對(duì)比了大底盤(pán)上雙塔樓高層建筑和大底盤(pán)上雙塔連體高層建筑的計(jì)算結(jié)果，給出了結(jié)構(gòu)抗震設(shè)計(jì)中需注意的問(wèn)題，最后提供了一些結(jié)論供設(shè)計(jì)參考。
[關(guān)鍵詞]  高層建筑 大底盤(pán) 雙塔樓 連體建筑  自振特性 抗震設(shè)計(jì)

Based on analyzing two example structures, a new concept that the same vibrational mode has two mode shapes in two-tower structure or two-tower structure linked by spatial corridors, both with enlarged base, is presented. The principle of choosing vibrational mode numbers in aseismlc analysis for this type of highrise building structures is discussed. Their calculating results are compared, and some questions in aseismic design are emphasised.ln the end, the useful results for structural aseismic design are given.
Keywords: high-rise building; enlarged base;  two-tower, spatial corridors; vibrational property; aseismic design