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（北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045）

［摘要］重慶國(guó)際博覽中心多功能廳總建筑面積為8萬(wàn)m2，平面尺寸為216m×261m的矩形。中央大廳鋼屋蓋采用雙向正交平面桁架體系，結(jié)構(gòu)跨度為117m。詳細(xì)介紹了結(jié)構(gòu)體系和項(xiàng)目特點(diǎn)；針對(duì)超長(zhǎng)結(jié)構(gòu)進(jìn)行了溫度應(yīng)力分析；通過(guò)多點(diǎn)多維時(shí)程分析，研究了行波效應(yīng)對(duì)大跨鋼結(jié)構(gòu)及周邊混凝土豎向構(gòu)件的影響；對(duì)鋼屋蓋進(jìn)行了中震彈性驗(yàn)算、抗連續(xù)性倒塌驗(yàn)算，并對(duì)主桁架關(guān)鍵相貫節(jié)點(diǎn)進(jìn)行了應(yīng)力分析，確保了屋蓋結(jié)構(gòu)的整體安全。

［關(guān)鍵詞］重慶國(guó)際博覽中心； 大跨鋼結(jié)構(gòu)； 超長(zhǎng)結(jié)構(gòu)； 多點(diǎn)多維時(shí)程分析； 抗連續(xù)性倒塌

中圖分類號(hào)：TU973-13, TU351文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)18-0037-04

Structural design of multifunctional hall in Chongqing International Exhibition Center

Wei Dong, Ni Feng, Zhou Wenyuan, Wei Liqiang, Shan Ruizeng

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The multifunctional hall in Chongqing International Exhibition Center covers a total floor area of 80 000 m2 and a rectangular plane of 216m×261m. The steel structure roof of the central hall consists of two-way orthogonal planar truss system with span of 117m. The structural system and project features were introduced in detail. The temperature stress in the super-long concrete structure was analyzed. The influence of traveling wave effect on the super-long steel structure and surrounding vertical concrete members was studied by multi-point and multi-dimensional time-history analysis. Elastic checking calculation and resistance to progressive collapse were conducted on the steel roof under fortification earthquake. The finite element stress analysis was done on the key intersecting joints of the main truss to ensure the whole roof structure safe.

Keywords:Chongqing International Exhibition Center; large-span steel structure; super-long structure; multi-point and multi-dimensional time-history analysis; resistance to progressive collapse

作者簡(jiǎn)介：衛(wèi)東，博士，教授級(jí)高級(jí)工程師，副總工程師，Email:weidong@biad.com.cn。