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（南京理工大學(xué) 210094）
【提要】 對(duì)具有突出物的多層框架和框剪結(jié)構(gòu)建立了力學(xué)模型，探討了結(jié)構(gòu)產(chǎn)生鞭梢效應(yīng)的原因，并推導(dǎo)了突出物頂部振型位移和主體頂部振型位移的比值公式。通過(guò)實(shí)例分析發(fā)現(xiàn)，突出物的質(zhì)量和剛度都影響著突出物鞭梢效應(yīng)的強(qiáng)弱，特征剛度值是框架剪力墻結(jié)構(gòu)產(chǎn)生鞭梢效應(yīng)的另一個(gè)重要影響因素。 因此可通過(guò)適當(dāng)調(diào)整結(jié)構(gòu)的剛度或質(zhì)量分布使突出物的頻率與整體結(jié)構(gòu)的頻率的差值增大，對(duì)框架剪力墻結(jié)構(gòu)還可以調(diào)整特征剛度比值來(lái)減小鞭梢效應(yīng)。
【關(guān)鍵詞】 鞭梢效應(yīng) 特征剛度 突出物 整體結(jié)構(gòu)
Study on  Whiplash Effect of Highrise Building/Zhu Ying，  Ding Jianguo(Nanjing Science and Technical University, Nanjing 210094, China)
Abstract:The mechanical model of highrise building with prominent part on its top is proposed. The reason of the whiplash effect on the building with prominent part is discussed. The ratio of mode displacement at the top of
structure's prominent part  to mode displacement at the top of structure's main part i
s given. Based on the case, it is known that both mass and  stiffness of the promin
ent part affect the whiplash effect, and characteristic stiffness is another important factor which affects the whiplash effect of the frameshear wall structure.
Keywords:whiplash effect； characteristic stiffness； prominent part； monolithic structure