（1清华大学建筑设计研究院有限公司，  北京 100084;  2 清华大学土木工程系，  北京 100084）

［摘要］天安门广场红飘带景观是国庆70周年庆典活动的重要工程，具有大跨度、大偏心、大悬挑、大扭转等复杂结构特征。同时，由于广场建设条件的特殊性，造成必须现场无焊接拼装、地基条件和抗风安全性指标难以量化等技术挑战。提出预制钢结构模块单元、现场全螺栓连接的设计理念，给出设计控制指标的确定方法，深入进行结构计算分析，对全装配模块单元及划分、螺栓连接关键节点等进行创新性设计。钢结构模块化设计理念得到充分检验。

［关键词］红飘带； 全装配钢结构； 结构模块单元； 螺栓节点

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)12-0053-05

Structural analysis and design of  the Red Ribbon  on the Tiananmen Square

WANG Lan1, SHI Yongjiu2, ZHANG Yizhou1, CHEN Jingwei1, LIU Yansheng1, CHEN Hong1

（1 Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China;2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China）

Abstract:The Red Ribbon on Tiananmen Square is the important project for the National Day Celebration of the 70th Anniversary. There are many complex structural characteristics including large span, large eccentricity, large cantilever and large rotation etc. Meanwhile, the construction on Tiananmen Square leads to many technical challenges including without-weld-erect on site, the uncertainty of geotechnical conditions and the hard-to-quantify of wind load resist criterions. A steel-structure-modularity concept of factory made steel module-unit and whole-bolt-connect on site were put forward, and the way of the design control criterions′ determination was given, the structure calculation and analysis were studied systematically, and fully-assembly module-unit and key nodes of bolt connection were design creatively. The design concept of steel-structure-modularity has been examined successfully.

Keywords:the Red Ribbon; fully-assembly steel structure; module-unit; bolt node

作者简介：王岚，硕士，教授级高工，一级注册结构工程师，英国结构工程师学会会员，Email:wanglan@tsinghua.org.cn。