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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］張家口奧體中心體育場(chǎng)鋼罩棚懸挑長(zhǎng)度超過(guò)40m，且下部看臺(tái)結(jié)構(gòu)存在樓板不連續(xù)、斜柱、錯(cuò)層復(fù)雜連接等不規(guī)則情況，屬于下部支承結(jié)構(gòu)特別不規(guī)則的大跨超限結(jié)構(gòu)，按照C級(jí)目標(biāo)進(jìn)行抗震性能化設(shè)計(jì)。小震下的彈性時(shí)程補(bǔ)充分析確定了整體結(jié)構(gòu)及局部錯(cuò)層復(fù)雜連接部位構(gòu)件的地震作用放大系數(shù)，大震下的彈塑性時(shí)程分析給出了結(jié)構(gòu)宏觀變形值及各類構(gòu)件進(jìn)入塑性的程度。對(duì)鋼罩棚進(jìn)行了非線性極限承載能力分析，并對(duì)關(guān)鍵節(jié)點(diǎn)應(yīng)力進(jìn)行有限元分析。結(jié)果表明，鋼罩棚具有良好穩(wěn)定性和承載能力。

［關(guān)鍵詞］體育場(chǎng)； 超限大跨結(jié)構(gòu)； 抗震性能設(shè)計(jì)； 動(dòng)力時(shí)程分析； 節(jié)點(diǎn)應(yīng)力分析

中圖分類號(hào)：TU318+.2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)18-0092-05

Key points of out-of-code seismic design for Zhangjiakou Olympic Center Sports Stadium

Feng Yang, Gao Ming, Jing Zhitao, Gan Ming, Li Huafeng， Xu Jinbei, Tian Jin

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

Abstract:Zhangjiakou Olympic Center sports stadium is an out-of-code large-span structure with an over 40 meters′ cantilever steel shed and a lower support structure which is particularly irregular in its slab discontinuity, titled columns and complex floor connection, etc. Performance-based seismic design was employed and the objective level was set to be level C. Elastic time-history supplementary analysis under frequent earthquakes determined the magnification factor of seismic action of the whole structure and the components in the complex connection part of local staggered layers. Elastic-plastic time-history analysis under rare earthquakes provided the macro-deformation value of the structure and the degree of plasticity of various components. The non-linear ultimate bearing capacity of the steel shed was analyzed and the stress of key joints was analyzed by finite element method. The results show that the steel shed has good stability and bearing capacity.

Keywords:sports stadium; out-of-code large-span structure; performance-based seismic design; time-history analysis; joint stress analysis

通訊作者：高鳴，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：gaomingbj@163.com。