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（浙江省建筑設(shè)計研究院， 杭州 310006）

［摘要］寧波國華金融大廈塔樓建筑高度2061m，是一座5A甲級寫字樓。塔樓采用斜交網(wǎng)格外框架核心筒雙重抗側(cè)力體系，周邊鋼梁僅在節(jié)點(diǎn)層與斜交網(wǎng)格剛接，在其余樓層鉸接。重力支承系統(tǒng)包括橫跨在核心筒與外圍斜交網(wǎng)格之間的鋼梁以及鋼梁支承的鋼筋桁架組合樓板。主要研究了該塔樓的結(jié)構(gòu)體系及特點(diǎn)、結(jié)構(gòu)構(gòu)件的性能目標(biāo)、斜交網(wǎng)格節(jié)點(diǎn)的設(shè)計、整體指標(biāo)的控制、彈性時程分析的地震效應(yīng)以及結(jié)構(gòu)主要抗震構(gòu)造措施。結(jié)果表明，

相對傳統(tǒng)的框架核心筒結(jié)構(gòu)體系，斜交網(wǎng)格外框架核心筒結(jié)構(gòu)體系中斜交網(wǎng)格外框架承擔(dān)的剪力和傾覆力矩均較大，可視為筒中筒結(jié)構(gòu)體系。

［關(guān)鍵詞］斜交網(wǎng)格體系； 超高層結(jié)構(gòu)； 鋼結(jié)構(gòu)； 抗側(cè)力體系； 斜交網(wǎng)格； 性能化設(shè)計

中圖分類號：TU355文獻(xiàn)標(biāo)識碼：A文章編號：1002848X(2019)03000906

Design of super highrise diagonal grid system for Ningbo Guohua Financial Tower

Wang Zhen, Yang Xuelin, Feng Yongwei, Zhang Chensheng

(Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China)

Abstract: Ningbo Guohua Financial Tower is a 5A grade office building of 2061 meters height. The double lateral force resisting system of the diagonal grid outer frame and the  corewall was adopted for the tower. The surrounding steel beams are simply connected to the diagonal grid at the node layer and hinged on the other floors. The gravity support system consists of a steel beam spanning between the outer diagonal grid and the corewall, and consists of the steel bar truss composite slab supported by the steel beam. The structural system and characteristics of the tower, the performance objectives of structural members, the design of diagonal grid joints, the control of overall indices, the seismic effect of elastic timehistory analysis and the main seismic structural measures were studied. The results show that the shear and overturning moments undertaken by the diagonal grid outer frame are larger for diagonal grid outer framecorewall structural system than those of the traditional framecorewall structural system, and diagonal grid outer framecorewall structural system can be regarded as the tubeintube structural system.

Keywords:diagonal grid system; super highrise structure; steel structure; lateral force resisting system; diagonal grid; performancebased design

*浙江省建設(shè)科研項(xiàng)目(2015K11)。

作者簡介：王震，博士，高級工程師，Email: wzjggc@163.com。