北京CBD核心區(qū)Z6地塊項目主塔樓結(jié)構(gòu)設(shè)計和研究
Jonathan Kerry, 鐘聰明，李婉瑩,武濤,豈凡,楊名流,劉允博，劉浩
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（奧雅納工程顧問， 北京 100020）
［摘要］北京CBD核心區(qū)Z6地塊項目主塔樓建筑高度405m，結(jié)構(gòu)高度394.7m，結(jié)構(gòu)立面呈現(xiàn)為盛開的花朵，實現(xiàn)了建筑、結(jié)構(gòu)、幕墻一體化設(shè)計。結(jié)構(gòu)體系采用了由巨柱、巨撐、密撐組成的斜交網(wǎng)格外框筒，以及下部含有鋼板鋼筋混凝土核心筒、上部鋼框架核心筒的內(nèi)筒。主塔樓存在高度超限、樓板不連續(xù)、剛度突變等超限情況，屬于超限高層結(jié)構(gòu)。主要針對主塔樓在超限高層結(jié)構(gòu)設(shè)計中的一些關(guān)鍵問題進(jìn)行介紹，對主塔樓結(jié)構(gòu)進(jìn)行彈性分析、彈塑性分析、抗連續(xù)倒塌分析、節(jié)點(diǎn)分析等， 結(jié)果表明該結(jié)構(gòu)能滿足規(guī)范要求，并達(dá)到預(yù)期的抗震性能目標(biāo)。為配合建筑外立面找形，結(jié)構(gòu)設(shè)計采用了BIM技術(shù)確定支撐的間距、起落點(diǎn)樓層，取得了建筑美觀和結(jié)構(gòu)受力的平衡以及與幕墻造型的完美統(tǒng)一。［關(guān)鍵詞］北京CBD核心區(qū)Z6地塊項目; 巨撐; 密撐; 一體化設(shè)計; BIM; 結(jié)構(gòu)設(shè)計中圖分類號：TU318 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2015)24-0044-09
Structural design and research of main tower of Z6 Plot Project in core area of Beijing CBDJonathan Kerry, Zhong Congming, Li Wanying, Wu Tao, Qi Fan, Yang Mingliu, Liu Yunbo, Liu Hao(Arup, Beijing 100020, China)Abstract: The main tower of Z6 Plot Project in core area of Beijing CBD has architectural height of 405m and structural height of 394.7m. Structural faade looks like a blooming flower, which fully integrates designs of architecture, structure and faade. Diagrid perimeter frame tube structural system is adopted with mega columns, mega braces and close braces. Reinforced concrete corewall with steel plates inside locates in bottom of inner corewall and steel frame corewall locates at upper level. The tower is an out-of-code structure due to its height, discontinuous floor and vertical stiffness irregularity and so on. Some key problems in structural design of out-of-code high-rise tower were introduced. The elastic analysis, elastic-plastic analysis, progressive collapse analysis and joint analysis show that the main tower structure can meet all code requirements and achieve the anticipated seismic performance objectives. In order to meet the architectural requirement in faade form, BIM technology was adopted in structural design to determine brace spacing as well as starting and landing layers for brace. In this way, architectural aesthetic achieved a great balance with structure mechanical requirement and achieved a perfect integration with curtain wall faade.Keywords: Z6 Plot Project in core area of Beijing CBD; mega brace; close brace; full integrated design; Building Information Modeling; structural design作者簡介：Jonathan Kerry，工程碩士，英國認(rèn)證工程師，英國土木工程師協(xié)會會員，Email: jonathan.kerry@arup.com。
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