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（北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045）

［摘要］靖江市金融商務(wù)區(qū)連體雙塔結(jié)構(gòu)總高92-5m，連體跨度42m，為特大跨度的高位連體超限結(jié)構(gòu)。主體雙塔采用鋼筋混凝土框架-剪力墻結(jié)構(gòu)體系，連體采用鋼桁架與次框架結(jié)構(gòu)。根據(jù)結(jié)構(gòu)特點(diǎn)采取了有針對(duì)性的加強(qiáng)措施，合理選取抗震性能化設(shè)計(jì)指標(biāo)，分析了連體樓板及關(guān)鍵節(jié)點(diǎn)應(yīng)力，對(duì)連體鋼桁架進(jìn)行抗連續(xù)倒塌設(shè)計(jì)，對(duì)整體結(jié)構(gòu)進(jìn)行大震彈塑性時(shí)程分析，對(duì)大跨度連體進(jìn)行豎向舒適度分析。結(jié)果表明，結(jié)構(gòu)能實(shí)現(xiàn)預(yù)設(shè)的抗震性能目標(biāo)，并具有較好的豎向舒適度水準(zhǔn)。

［關(guān)鍵詞］雙塔連體； 超限高層； 抗震性能化設(shè)計(jì)； 豎向舒適度； 抗連續(xù)倒塌

中圖分類號(hào)：TU973+.14文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)17-0049-05

Structural design on out-of-code high-rise linked twin-tower building in Finance and Business Center in Jingjiang

Feng Yang, Gao Ming, Yan Dongqiang, Jing Zhitao, Li Huafeng, Xu Jinbei

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The 92-5-meter-high linked-twin-tower in Finance and Business Center in Jingjiang has 42-meter-span connections between towers. It is an out-of-code super-large-span high level connecting structure. The main twin-towers adopt reinforced concrete frame-shear wall structural system. Connecting structure adopts steel truss and sub frame structure. According to the characteristics of the structure, corresponding strengthening measures were taken. Performance-based seismic design indices were reasonably selected. The stresses of the connected floor and the key nodes were analyzed. Progressive collapse prevention design was conducted on connected steel truss. Elasto-plastic time-history analysis was conducted on the overall structure under rare earthquake. The vertical comfort level analysis of large-span connected structure was conducted. The results show that the structure can achieve the established goal of seismic performance, and has a good vertical comfort level.

Keywords:linked twin-tower; out-of-code high-rise building; performance-based seismic design; vertical comfort level; progressive collapse prevention

通訊作者：高鳴，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：gaomingbj@163.com。