（中国建筑设计研究院有限公司， 北京  100044）

［摘要］2019北京世园会中国馆主体结构分为上部钢结构屋盖和下部混凝土结构两部分。下部混凝土展厅和上部钢结构屋盖均属于超长结构，混凝土展厅采用钢筋混凝土框架-剪力墙，钢屋盖采用鱼腹式空腹桁架，支承钢屋盖的短柱落于二层混凝土结构之上。对钢屋盖进行了恒载、活载、小震弹性、多风向角风荷载、不均匀雪荷载、温度作用的计算；同时对钢屋盖进行罕遇地震弹塑性计算、抗连续性倒塌计算等。结果表明，钢屋盖的承载力、刚度、稳定性均满足设计要求。

［关键词］2019北京世园会； 中国馆； 大跨度钢屋盖； 抗连续性倒塌

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2019)17-0001-04

Design on steel roof structure of China Pavilion of International Horticultural Exhibition 2019, Beijing, China

Cao Yongchao， Shi Hong， He Xiangyu， Li Yiran

(China Architecture Design & Research Group， Beijing 100044， China)

Abstract:The main structure of  China Pavilion of International Horticultural Exhibition 2019, Beijing, China is divided into two parts: the upper steel roof and the lower concrete structure. The lower concrete exhibition hall and the steel roof belong to the super-long structure. The concrete exhibition hall adopts reinforced concrete frame-shear wall, the steel roof adopts fish-web open-web truss, and the short columns supporting the steel roof fall on the two-story concrete structure. The steel roof was calculated under dead load, live load, frequent earthquake elasticity, multi-wind angle wind load, non-uniform snow load and temperature effect. At the same time, elastic-plastic analysis was conducted on the steel roof under rare earthquake and anti-progressive collapse calculation was conducted. The results show that the bearing capacity, stiffness and stability of the steel roof meet the design requirements.

Keywords:International Horticultural Exhibition 2019, Beijing, China; China Pavilion; large-span steel roof; anti-progressive collapse

作者简介：曹永超，硕士，工程师，一级注册结构工程师，Email:55659175@qq.com。