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1)廣東省建筑設(shè)計(jì)研究院，廣州，510010;2)華南理工大學(xué)高層建筑結(jié)構(gòu)研究所，廣州，510641;3)廣州容柏生建筑工程設(shè)計(jì)事務(wù)所，510170

［提要］為探索位于雙塔高層建筑上的連體結(jié)構(gòu)豎向地震作用的特有規(guī)律，首先輸入多條實(shí)際豎向地震記錄，用時(shí)程分析法考察了塔樓高度和連體跨度不同的多個(gè)算例。然后將其抽象成塔樓和連體桁架組成的兩個(gè)自由度體系，運(yùn)用頻域分析方法，得到豎向地震作用的變化規(guī)律。分析表明，隨著桁架與塔樓頻率比的增加，連體地震作用的放大效應(yīng)越明顯；當(dāng)連體與塔樓質(zhì)量比較小且兩者頻率相近時(shí)，連體地震反應(yīng)進(jìn)一步加強(qiáng)?，F(xiàn)行抗震規(guī)范的重力系數(shù)法提出的大跨度結(jié)構(gòu)豎向地震的實(shí)用計(jì)算公式對(duì)于文中研究結(jié)構(gòu)并不完全適用。提出了考慮塔樓和桁架協(xié)同的地震作用實(shí)用算式，并對(duì)一個(gè)超高層工程實(shí)例進(jìn)行了豎向地震作用分析，與時(shí)程分析結(jié)果吻合較好。

［關(guān)鍵詞］連體結(jié)構(gòu)；高層建筑；豎向地震

Practical Design Method for Large Span Corridor Structure in Twin-tower Tall Building/Hou Jiajian^1,2, Rong Baisheng^1，3, Han Xiaolei², Xie Yiyuan²(1 The Architectural Design and Research Institute of Guangdong Province,Guangzhou 510010,China; 2 South China University of Science and Technology,Guangzhou 510641,China; 3 RBS Architecture Engineer Design Associate,Guangzhou 510170,China)Abstract:The vertical seismic response of space corridor built on twintower tall buildings is investigated. The time history analysis is applied, the inputs are vertical seismic records, and the examples vary with tower height or truss span. Then the structure is simplified as a 2-DOF model and analyzed in frequency domain, and the main principles of vertical seismic response are drawn: with the increasing of truss to tower frequency ratio, the amplification of seismic response is increased; when the truss to tower mass ratio is small and the truss to tower ration is close to 1, the seismic responseof truss is increased further. The gravity load ratio method adopted by current China aseismic design code does not work out with safe result in the researched structure. A seismic response amplified factor formula is suggested. An example of supertall building has been analyzed with the suggested method and the time history method, the results coincide well.

Keywords:twin tower; tall building; space corridor; vertical sei