（中南建筑设计院股份有限公司， 武汉 430071）

［摘要］武汉天河国际机场T3航站楼属于特大型枢纽航空港，屋面为自由双曲面，总投影面积约23.7万m2，檐口悬挑最大39m，采用两向正交正放空间网格钢结构体系，屋面外围护系统采用直立锁边金属屋面系统，外墙围护系统为玻璃索网幕墙。介绍了T3航站楼屋盖结构分区、结构体系、结构计算设计、节点分析及试验研究等。针对本工程复杂的屋盖曲面建模，自主开发了建模软件，大幅提高了结构建模精度及效率；为了解决普通相贯节点强度不足的问题，采用了自主创新的带暗节点板的相贯节点和铸钢节点，并进行有限元分析和节点试验验证其安全性；创新设计的檩条连接节点，有效地减小了温度作用对钢屋盖的影响及屋面施工标高误差；钢结构健康监测系统的合理设计，确保了钢结构的施工质量和其在投入使用中的安全性及耐久性。

［关键词］武汉天河国际机场； 两向正交正放空间网格； 自由曲面； 相贯节点； 檩条节点； 健康监测

中图分类号：TU318, TU391文献标识码：A文章编号：1002-848X(2020)08-0015-07

Structural design on steel roof of terminal T3 of Wuhan Tianhe International Airport

RUAN Xiangju, YUAN Liming, LI Ting, WANG Xiaonan, ZHANG Shen

（CentralSouth Architectutal Design Institute Co.， Ltd.， Wuhan 430071，  China）

Abstract:Terminal T3 of Wuhan Tianhe International Airport is a super large hub airport. The roof is free hyperboloid, with a total projection area of about 237 000m2. The cornice overhang is 39m at most. The two-dimensional orthogonally spatial  grid steel structural system is adopted. The external roof enclosure system adopts vertical locking metal roof system, and the external wall enclosure system is glass cable net curtain wall. The structural partition, structural system, structural calculation design, joint analysis and experimental research of terminal T3 roof were conducted. For the complex roof hyperboloid modeling of the project, the modeling software was developed independently, which greatly improved the accuracy and efficiency of structural modeling; in order to solve the problem of insufficient strength of common intersecting joints, the intersecting joints and cast steel joints with concealed gusset plate were adopted, and their safety was verified by finite element analysis and joint test; the innovative design of purlin connection node effectively reduced the influence of temperature on steel roof and the error of roof construction elevation; the reasonable design of steel structure health monitoring system ensured the construction quality, the safety and durability of steel structure in use.

Keywords:Wuhan Tianhe International Airport; two-dimensional orthogonally spatial grid; free hyperboloid; intersecting joint; purlin joint; health monitoring