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(北京市建筑設(shè)計研究院有限公司， 北京 100045)
［摘要］國家會議中心二期項目總建筑面積約40.9萬m2，主要功能為會議、展覽中心及配套用房。為平衡項目用地限制及建筑功能需求，采用了在多層建筑的底部設(shè)置大跨空間的形式。在首層頂板利用周邊夾層高度設(shè)置雙向巨型桁架，實現(xiàn)72，81m大跨轉(zhuǎn)換結(jié)構(gòu)，支承上部多層建筑。針對設(shè)計階段轉(zhuǎn)換結(jié)構(gòu)選型、關(guān)鍵構(gòu)件設(shè)計、復(fù)雜節(jié)點設(shè)計、溫度效應(yīng)分析等進行了介紹。根據(jù)工程需要，針對施工階段轉(zhuǎn)換結(jié)構(gòu)帶樓板整體卸載方案進行了安裝及卸載過程模擬，對結(jié)構(gòu)整體變形及關(guān)鍵構(gòu)件應(yīng)力進行了詳細分析，驗證了帶樓板整體卸載方案的可行性，并且施工模擬數(shù)據(jù)與施工監(jiān)測數(shù)值符合程度較好。
［關(guān)鍵詞］國家會議中心二期項目；大跨重載轉(zhuǎn)換結(jié)構(gòu)；復(fù)雜節(jié)點設(shè)計；溫度效應(yīng)；施工模擬
中圖分類號：TU398-7 文獻標識碼：A文章編號：1002-848X(2021)19-0007-06
Key points on large-span and heavy-load transfer structure design of Project of China National Convention Center Phase Two
WANG Xinxin, YU Donghui, HAN Wei, CHANG Ting
(Beijing Institute of Architectural Design, Beijing 100045， China)
Abstract:With a total construction area of nearly 0.409 million square meters, the main functions of Project of China National Convention Center Phase Two are conference, exhibition and supporting rooms. In order to balance the restriction of land use and the demand of building function, the form of setting large span space at the bottom of multi-storey building was adopted. Two-way huge truss was set up with the height of surrounding interlayer to realize 72m and 81m large-span transfer structure and support the upper multi-storey building.The selection of transfer structure, design of key components, design of complex joints and temperature effect analysis were introduced . According to the requirement of the construction progress, the installation and unloading process simulation of the overall unloading scheme of the conversion structure with floor slab in the construction stage was carried out. The overall deformation of the structure and the stress of the key components were analyzed in detail. The feasibility of the overall unloading scheme with floor slab was verified, and the construction simulation data were in good agreement with the construction monitoring data.
Keywords:Project of China National Convention Center Phase Two； large-span and heavy-load transfer structure； complex joint design； temperature effect； construction simulation
作者簡介：王鑫鑫，碩士，工程師，Email:wangxinxin@biad.com.cn。
