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（香港華藝設(shè)計顧問（深圳）有限公司， 深圳 518031）

［摘要］中海油（深圳）大廈裙房是總高度為245m的大跨結(jié)構(gòu)，位于兩棟超高層塔樓之間。為滿足市政規(guī)劃及建筑功能提出的結(jié)構(gòu)內(nèi)部需具備336m無柱空間、結(jié)構(gòu)周邊雙向需分別提供504m及276m大跨空間的要求，結(jié)構(gòu)設(shè)計時提出了一種新型結(jié)構(gòu)體系：型鋼混凝土框架四角筒雙向鋼桁架混合結(jié)構(gòu)體系，其中剪力墻筒體和型鋼混凝土框架柱作為豎向抗側(cè)力構(gòu)件，跨層鋼桁架實現(xiàn)了豎向抗側(cè)力構(gòu)件之間的水平力傳遞，并為梁、樓板的合理布置提供了條件。采用有限元分析方法對此結(jié)構(gòu)進(jìn)行了罕遇地震作用下的彈塑性時程反應(yīng)分析，計算結(jié)果表明，新型型鋼混凝土框架四角筒雙向鋼桁架混合結(jié)構(gòu)體系的結(jié)構(gòu)位移滿足規(guī)范限值要求，四角筒的損傷主要集中在連梁處，大跨桁架保持不屈服，混凝土梁及鋼梁的損壞有效耗散了地震輸入能量，證明了此結(jié)構(gòu)布置的合理性。

［關(guān)鍵詞］型鋼混凝土框架； 四角筒； 雙向鋼桁架； 彈塑性時程分析

中圖分類號：TU973       文獻(xiàn)標(biāo)識碼：A       文章編號：1002-848X(2015)07-0100-07

Seismic analysis for a newtype hybrid structure of steel reinforced concrete

framefour corner tubesbidirectional steel truss

Chen Qin, Zhang Wei, Zeng Deguang

 ( Hong Kong Hua Yi Design Consultants(S.Z.) Ltd., Shenzhen 518031, China)

Abstract:The podium of CNOOC Shenzhen Building is a fourstory largespan structure with 245 meters height, and situated between two super highrise towers. To fulfill the requirements of the local municipal planning and architecture functions, the interior of the podium should supply 336 meters astylar space and the perimeter of the structure should supply 504 meters and 276 meters largespan space in two directions, a newtype structure was proposed for the podium, named as steel reinforced concrete (SRC) framefour corner tubesbidirectional steel truss hybrid structural system. The shear wall tube and SRC columns worked as vertical lateral force resisting components, while the crosslayer steel trusses could realize the internal force transmission between lateral force resistance components and supply the conditions for reasonable layout of beam and floor members. Elastoplastic timehistory analysis for the structure under the rare earthquake was carried out by using the finite element method. The analysis results indicate that the displacement of the new\|type structure can satisfy the seismic design requirements of Chinese codes. The damages of the four corner tubes focus on coupling beams. Largespan steel trusses keep nonyielding state. The damages on RC beams and steel beams can dissipate some dynamic energy. Therefore the rationality of the structural arrangement is verified.

Keywords:SRC  frame; four corner tube; bidirectional steel truss; elastoplastic timehistory analysis

作者簡介：陳勤，博士，高級工程師，Email：chenqin@huayidesign.com。

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