（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］北京新机场屋顶及支承系统采用钢结构，航站楼屋顶钢结构分为6个区，分别为中央大厅和5个指廊区域，大厅部分屋顶支承结构由C形柱、支承筒、北侧幕墙支承框架、钢管柱和其他幕墙柱组成，指廊由钢管柱和幕墙柱支承，屋顶为自由曲面，结构形式为网架和桁架，屋面围护系统为带装饰板的直立锁边金属屋面，外墙围护系统为玻璃幕墙。介绍了北京新机场航站楼屋顶钢结构的结构体系，对其中最为复杂的结构单元中央大厅屋顶支承结构（C形柱）的承载能力做了详细的分析研究，并对中央大厅整体屋顶钢结构的非线性稳定承载能力做了细致的研究，同时对屋顶钢结构支承结构的整体竖向承载能力和水平承载能力分别进行了分析，总结了多个角度下水平承载能力大小，为确定支承结构的抗震性能提供了依据。

［关键词］北京新机场； 航站楼钢结构； C形柱； 极限承载力； 节点； 抗震设计

中图分类号：TU318文献标识码：A文章编号：1002-848X(2017)18-0001-05

Steel structural design of terminal building of Beijing New Airport

Shu Weinong, Zhu Zhongyi, Qin Kai, Zhang Lin, Liang Chenyu, Zhou Zhongfa, Wang Zhe, Wang Yi

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

Abstract:Steel structures are used for roof structure and its supporting system of  terminal building of Beijing New Airport. The roof steel structure of the terminal building is divided into 6 districts, namely the central hall and 5 corridor areas. The roof supporting structure of the hall part is composed of C-shaped column, supporting tube, north curtain wall supporting frame, steel pipe column and other curtain wall column. The corridor is supported by steel pipe column and curtain wall. The roof features a free-form surface and the structural system is grid and truss. The roof containment system adopts an upright lockrand metal roof with decoration plate. The external wall containment system adopts a glass curtain wall. The structural system of the roof steel structure of  terminal building of Beijing New Airport was introduced, and a detailed analysis was conducted on the bearing capacity of the most complex structural unit:roof supporting structure (C-shaped column) in the central hall. At the same time, the overall vertical bearing capacity and horizontal bearing structure of roof steel structure supporting system were analyzed, and the horizontal bearing capacity of multi angles was summarized, providing a basis for determining the seismic performance of the supporting structure. 

Keywords:Beijing New Airport; steel structure of terminal building; C-shaped column; ultimate carrying capacity; joint; seismic design

* 北京市科技支撑项目（Z161100005116009)。

通讯作者：朱忠义，博士，教授级高级工程师，Email:1027311973@qq.com。