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（中國建筑設(shè)計(jì)研究院有限公司， 北京  100044）

［摘要］2019北京世園會(huì)中國館主體結(jié)構(gòu)分為上部鋼結(jié)構(gòu)屋蓋和下部混凝土結(jié)構(gòu)兩部分。下部混凝土展廳和上部鋼結(jié)構(gòu)屋蓋均屬于超長結(jié)構(gòu)，混凝土展廳采用鋼筋混凝土框架-剪力墻，鋼屋蓋采用魚腹式空腹桁架，支承鋼屋蓋的短柱落于二層混凝土結(jié)構(gòu)之上。對(duì)鋼屋蓋進(jìn)行了恒載、活載、小震彈性、多風(fēng)向角風(fēng)荷載、不均勻雪荷載、溫度作用的計(jì)算；同時(shí)對(duì)鋼屋蓋進(jìn)行罕遇地震彈塑性計(jì)算、抗連續(xù)性倒塌計(jì)算等。結(jié)果表明，鋼屋蓋的承載力、剛度、穩(wěn)定性均滿足設(shè)計(jì)要求。

［關(guān)鍵詞］2019北京世園會(huì)； 中國館； 大跨度鋼屋蓋； 抗連續(xù)性倒塌

中圖分類號(hào)：TU393-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡介：曹永超，碩士，工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:55659175@qq.com。