（1 东南大学成贤学院土木与交通工程学院， 南京 210088； 2 东南大学土木工程学院， 南京 210096； 3 华东建筑设计研究总院， 上海 200002； 4 南京大学建筑规划设计研究院有限公司， 南京 210093）

［摘要］结合某一体育场工程，对此体育场罩棚钢结构开展受力性能分析。体育场罩棚钢结构为双轴对称的马鞍面，采用长悬臂交叉桁架结构体系，并设置环向桁架加强罩棚钢结构的整体性。在详细阐述结构体系及特点基础上，利用多个有限元软件对罩棚钢结构开展了模态、受力、变形分析，且采用时程分析法和振型分解反应谱法进行了地震作用分析，对罩棚钢结构开展双非线性稳定分析和关键杆件失效时连续倒塌分析，对结构中较为关键的节点（如柱脚的铸钢节点和转换头节点）进行了精细化有限元分析。结果表明，该罩棚钢结构各项性能指标均满足规范要求，结构体系合理、整体性良好。

［关键词］大跨悬挑钢结构； 非线性稳定分析； 连续倒塌分析； 大悬臂交叉桁架体系

中图分类号：TU318文献标识码：A文章编号：1002-848X(2020)21-0038-07

Analysis and design of complex long-span stadium canopy steel structure

LIU Meijing1, ZENG Shaoru2, HE Bingbing3, TANG Rongguang4, FAN Shenggang2

(1 School of Civil and Transportation Engineering, Southeast University Chengxian College, Nanjing 210088, China; 2 School of Civil Engineering, Southeast University, Nanjing 210096, China; 3 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China; 4 Institute of Architecture Design and Planning Co., Ltd., Nanjing University, Nanjing 210093, China)

Abstract: Based on a stadium project, the mechanical behavior of the steel structure of the stadium canopy was analyzed. The canopy shell of the stadium is biaxially symmetrical saddle shapped. The long cantilever cross truss system was adopted and the circumferential truss was set up to strengthen the integrity of the canopy structure. The structural system and its characteristics were expounded in detail. The modal analysis, stress analysis and deformation analysis of the canopy steel structure were carried out by using several finite element software. The time history analysis method and mode-decomposition response spectrum method were used to analyze the seismic action. The double nonlinear stability analysis and the continuous collapse analysis of the canopy steel structure under the failure of key members were carried out. The key joints in the structure, such as cast steel joints and transfer joints, were analyzed by fine finite element method. The results show that all the indexes of the canopy steel structure meet the requirements of the code, the structural system is reasonable and the integrity of the canopy steel structure is good.

Keywords:long-span cantilever steel structure; nonlinear stability analysis; continuous collapse analysis; long cantilever cross truss system

*国家自然科学基金资助项目(51878146，51378105)，江苏省“青蓝工程”中青年学术带头人资助项目(2016)，江苏省“六大人才高峰”高层次人才选拔培养资助项目(JZ-001)。

作者简介：刘美景，硕士，副教授，Email:1482479117@qq.com； 通信作者：范圣刚，博士，教授，Email:101010393@seu.edu.cn。