(北京市建筑设计研究院，100045)

［提要］首都机场T3航站楼交通中心(GTC)平面为椭圆形，长宽近似为550m×350m，属于超大面积的建筑。根据工程的特点和遇到的问题，系统地介绍了工程的结构设计情况。重点介绍了超长结构的设计原则、计算方法、构造措施等方面的内容，并结合屋顶拱形钢结构的特点，介绍了屋顶钢结构的设计。

［关键词］首都机场；T3航站楼；超长结构；温度应力；拱形钢结构

Structural Design of Ground Transportation Center of Terminal 3 at Beijing Capital International Airport/Shu Weinong, Zhou Sihong, Zhu Zhongyi, Gao Jianming (Beijing Institute of Architecture Design, Beijing 100045,China)

Abstract:The ground transportation center of terminal 3 at Beijing capital international airport, with an elliptic plan and with the length by width of approximately 550m×350m, is an over-sized architecture. Based on the specialty of this project and problems encountered, the structural design of the project is introduced systematically. It emphasizes on the design principles, computation methods and construction detailing, etc. of this over-length structure. Combined with characteristics of the roof arch steel structure, it also presents the design of the roof steel structure.

Keywords:Beijing capital international airport; terminal 3; over-length structure; temperature stress; arch steel structure