(1  北京市建筑设计研究院  100045；2  北京城建设计研究总院  100037)

［提要］对大跨度超大空间体育场馆抗震体系设计提出了新的布局和思路，将型钢混凝土框架 钢支撑和钢筋混凝土框架剪力墙混合结构体系运用到国家体育馆工程中，并就这种新结构布局的特点和产生的问题进行分析。比较了不同钢支撑布置方式对型钢混凝土框架与钢支撑体系周期、变形及内力的影响，对型钢混凝土梁、柱节点区因钢支撑的斜交产生的三向交叉复杂节点进行分析，提出解决方案并给出了结构关键节点的构造。

［关键词］国家体育馆；型钢混凝土框架；钢支撑；混合结构；复杂型钢混凝土节点设计

Design of Main Structure in National Indoor Stadium of Beijing 2008 Olympic Games/Feng Yang¹, Qin Yang¹, Gan Ming¹, Ke Changhua1, Chen Jinke² (1 Beijing Institute of Architectural Design, Beijing 100045, China; 2 Beijing Urban Engineering Design & Research Institute, Beijing 100037, China)

Abstract:The new layout and ideas of seismic system design of the large－span space gymnasium was brought forward. The composite structure system of formed steel reinforced concrete frame steel bracing and reinforced concrete frame shear wall was used in the seismic design of National Gymnasium, and some structural layout features and problems of this new structure were analyzed. The impact of different steel bracing layout on period, deformation and internal forces of formed steel reinforced concrete frame steel bracing system was compared. Three dimensional cross complex node produced by the oblique conjoining of steel bracing in formed steel reinforced concrete beam and column node area was analyzed, and the problem solving project and constitution of key nodes were put forward.

Keywords: National Indoor Stadium; formed steel concrete frame-steel bracing; composite structure; node design of complex formed steel reinforced concrete