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    婁  宇  程  輝  施  昌
    （中國電子工程設(shè)計(jì)院  北京 100840）

[提要]  結(jié)合三個(gè)算例的分析，給出了大底盤上多塔樓高層建筑在某一方向振動時(shí)，既存在各個(gè)塔樓連同底部裙房一起的同方向振動，又存在每個(gè)塔樓之間相對振動的結(jié)構(gòu)振動特點(diǎn)，歸納了大底盤上多塔樓高層建筑結(jié)構(gòu)抗震分析時(shí)，計(jì)算振型數(shù)的選取方法和選取原則。
[關(guān)鍵詞]  高層建筑  大底盤  多塔樓  自振特性  抗震分析

Through three calculating examples, the structure vibrational property of multi-tower structure with enlarged base is presented. The vibrating on certain direction is not only every tower with enlarged base on the same direction, hut is also in the opposite direCtion among every tower. The principle and method of choosing vibration mode number in aseismlc analysis for this type of high-rise building structures are concluded.
Keywords:  high-rise building; enlarged base; multi-tower; vibrational property; aseismic analysis