（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］张家口奥体中心体育场钢罩棚悬挑长度超过40m，且下部看台结构存在楼板不连续、斜柱、错层复杂连接等不规则情况，属于下部支承结构特别不规则的大跨超限结构，按照C级目标进行抗震性能化设计。小震下的弹性时程补充分析确定了整体结构及局部错层复杂连接部位构件的地震作用放大系数，大震下的弹塑性时程分析给出了结构宏观变形值及各类构件进入塑性的程度。对钢罩棚进行了非线性极限承载能力分析，并对关键节点应力进行有限元分析。结果表明，钢罩棚具有良好稳定性和承载能力。

［关键词］体育场； 超限大跨结构； 抗震性能设计； 动力时程分析； 节点应力分析

中图分类号：TU318+.2文献标识码：A文章编号：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

通讯作者：高鸣，硕士，高级工程师，一级注册结构工程师，Email：gaomingbj@163.com。