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（1 北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045；2 中建鋼構(gòu)有限公司，天津 300383）

［摘要］北京CBD核心區(qū)Z6地塊項(xiàng)目位于CBD核心區(qū)西南向，塔樓采用筒中筒結(jié)構(gòu)，其中不規(guī)則網(wǎng)格外框筒由巨柱-巨撐-密撐組成，內(nèi)筒由底部混凝土核心筒、上部鋼框架核心筒組成。主要對(duì)外框筒中巨柱、巨撐、密撐相交形成的各類復(fù)雜節(jié)點(diǎn)進(jìn)行分類，并通過(guò)設(shè)計(jì)原則、加強(qiáng)措施及有限元分析對(duì)節(jié)點(diǎn)進(jìn)行設(shè)計(jì)，重點(diǎn)介紹了巨撐、密撐與巨柱連接節(jié)點(diǎn)、巨柱底部節(jié)點(diǎn)和巨撐下部與巨柱連接節(jié)點(diǎn)設(shè)計(jì)，旨在滿足相應(yīng)性能目標(biāo)的同時(shí)使節(jié)點(diǎn)易于加工。

［關(guān)鍵詞］超高層建筑； 不規(guī)則網(wǎng)格體系； 彈塑性計(jì)算； 復(fù)雜節(jié)點(diǎn)

中圖分類號(hào)：TU973+.257, TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)18-0057-06

Joint design of outer frame-tube structure with irregular grid system in Z6 plot of Beijing CBD

Wang Xu1, Jing Pengpeng1, Jin Haiqing1, Zhang Shufeng2, Zhang Chao2, Shu Weinong1

(1 Beijing Institute of Architectural Design, Beijing 100045， China; 2 China Construction Steel Structure Co.，  Ltd.，  Tianjin 300383， China)

Abstract:The Z6 plot of Beijing CBD project is located in the southwest of the core area of  CBD. The tower building adopts tube-in-tube structural system, and irregular grid outer frame-tube is composed of mega columns-mega braces-close braces, and inner core tube is composed of bottom reinforced concrete corewall and upper steel frame corewall. All kinds of complex joints which are formed by mega columns, mega braces and close braces in outer frame-tube were mainly categorized. The joints were designed according to the design principles and strengthening measures while using the finite element analysis. Some joint designs were introduced emphatically, including joint between mega brace, close brace and mega column, bottom joint of mega column, and joint between bottom mega brace and mega column, in order to fulfill performance goals and make joint convenient to produce.

Keywords:super high rise building; irregular grid system; elasto plastic calculation; complex joint

作者簡(jiǎn)介：王旭，博士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：ppcmovie@sina.com。