（1 中国建筑设计研究院有限公司， 北京 100044； 2 北京交通大学土木工程学院, 北京 100044）

［摘要］妫汭剧场钢结构屋面工程为大跨屋盖超限建筑。针对钢结构屋面工程超限实际情况，对相关超限计算分析手段和超限设计措施予以阐述。主要研究内容包括：结构整体稳定设计、风荷载作用分析、结构性能化设计、地震时程分析、防连续倒塌设计、温度应力分析、典型施工状态分析、单榀桁架复核设计、节点设计。分析结果表明，通过采用系统的超限计算分析和超限设计措施，钢结构屋面体系的超限情况得到针对性设计加强，结构安全、可靠，结构设计可行。

［关键词］2019北京世园会； 妫汭剧场； 大跨屋盖； 悬挑桁架； 超限工程

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2019)17-0020-09

Out-of-code design and analysis on steel structure roof of Guirui Theatre of International Horticultural Exhibition 2019, Beijing, China

Zhu Yufeng1, Zhang Lu1, Zhang Jian2; Cui Xiaolian1, Guo Qiang1

（1 China Architecture Design & Research Group, Beijing 100044, China; 2 School of Civil Engineering, Beijing Jiaotong Univerisity, Beijing 100044, China）

Abstract:The steel structure roof project of Guirui Theatre is a large-span roof out-of-code building. In view of the actual out-of-code situation of steel roof engineering, the relevant out-of-code calculation and analysis means and design measures were expounded. The main research contents include structural overall stability design, wind load analysis, structural performance-based design, seismic time-history analysis, anti-progressive design, temperature stress analysis, typical construction state analysis, single truss review design and joint design. The analysis results show that, by using the systematic out-of-code calculation analysis and design measures, the out-of-code condition of the steel structure roof system is strengthened by targeted design. The structure is safe and reliable, and the structure design is feasible. 

Keywords:International Horticultural Exhibition 2019, Beijing, China; Guirui Theatre; long-span roof; cantilever truss; out-of-code project

通讯作者：张路，博士，教授级高级工程师，Email: 499686486@qq.com。