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（華東建筑設(shè)計(jì)研究總院， 上海 200002）

［摘要］成都大魔方演藝中心大陀螺鋼屋蓋采用大跨度空間桁架結(jié)構(gòu)體系，不均勻地承重于剪力墻、部分筒體及框架柱上，支承條件復(fù)雜。設(shè)計(jì)時(shí)采用單獨(dú)的鋼屋蓋結(jié)構(gòu)模型和含鋼屋蓋與下部混凝土結(jié)構(gòu)的整體模型進(jìn)行對(duì)比分析，分析結(jié)果表明，設(shè)計(jì)中應(yīng)充分考慮下部結(jié)構(gòu)對(duì)鋼屋蓋的影響。選取鋼屋蓋中的關(guān)鍵節(jié)點(diǎn)進(jìn)行有限元模擬分析，針對(duì)應(yīng)力較大的節(jié)點(diǎn)，采取有效的加強(qiáng)措施。設(shè)計(jì)結(jié)果表明，屋蓋結(jié)構(gòu)不僅能滿足建筑的外觀及復(fù)雜的功能要求，而且具有可靠的受力性能。

［關(guān)鍵詞］鋼屋蓋; 空間桁架結(jié)構(gòu); 上下部結(jié)構(gòu)相互作用; 抗震球形支座; 節(jié)點(diǎn); 有限元分析

中圖分類號(hào)：TU393.3      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)07-0043-07

Structural design and analysis on steel roof of the main venue of Chengdu Large Magic Cube Performing Arts Center

Zhou Jian, Zhou Hui, Zhang Yaokang, Zhang Weiyu

 (East China Architectural Design & Research Institute, Shanghai 200002, China)

Abstract: The roof structure of the main venue of Chengdu Large Magic Cube Performing Arts Center is a large span space truss supported on the shear walls, tubes and frame columns. The support conditions are complex and non uniform. The analysis, considering the interaction of roof and the lower structure was compared with what, considering the steel roof structure only. It was indicated that the influence of lower structure on the steel roof is significant enough to be considered. Key joints were researched by finite element analysis, and the high stressed connections were strengthened effectively. Design results show that the structure not only meets the architectural feature and function satisfactorily, but also has reliable mechanical performance.

Keywords: steel roof; space truss structure; interaction of upper and lower structure; seismic spherical bearing; joint; finite element analysis

*國(guó)家科技支撐計(jì)劃資助（2011BAJ09B01）。

通訊作者：周慧，碩士，工程師，Email:hui_zhou@ecadi.com。

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