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（同濟(jì)大學(xué)建工系，上海200092）
［提要］針對設(shè)有長33.6m的連體和長16.8m懸臂的某多塔連體高層結(jié)構(gòu)，采用ETABS軟件對其豎向振動特性和豎向地震反應(yīng)進(jìn)行了分析。結(jié)果表明，該工程前三階豎向振型的周期與場地卓越周期接近；前19階豎向振型均位于反應(yīng)譜平臺段；豎向振動與水平振動存在耦合，意味著結(jié)構(gòu)在水平地震作用下會產(chǎn)生豎向動力效應(yīng)；在7度多遇豎向地震作用下，連體部分和懸臂部分的結(jié)構(gòu)內(nèi)力響應(yīng)較顯著而豎向位移響應(yīng)均較小。
［關(guān)鍵詞］多塔連體；豎向地震反應(yīng)；振動特性
Analysis on Vertical Seismic Response of a Connected Multi tower Building/ShiWenlong,Sun Feifei,Li Guoqiang(Dept. Civil Engineering, Tongji Univ., Shanghai 200092,China)
Abstract:The vertical dynamic characteristic and vertical seismic response of a building with a 168meterlong cantalever and a 336meterlong connecting is analyzed. It turns out that the first three vertical normal periods are close to the characteristic period of the site；the first 19 vertical modes are all located in the plateau of the response spectrum;there is interaction between vertical and horizontal vibrations, which means the structure would produce vertical dynamic response under horizontal earthquakes; under frequent earthquakes of seismic intensity 7, the structural internal forces in the connecting and cantalever parts are significant, while the vertical displacements are rather small.
Keywords:connected multitowers; vertical seismic response; dynamic charactiristic