（1 中国民航大学机场学院， 天津 300300； 2 天津市建筑设计院， 天津300074）

［摘要］介绍了天津滨海国际机场T2航站楼钢屋盖的基本概况、结构特点与设计参数。计算了屋盖各分区结构的自振周期与杆件最大应力比，计算结果表明，结构设计在满足控制应力比的基础上最大程度地提高了材料的利用率。结构上、下弦杆截面的控制因素为稳定应力，而腹杆截面的控制因素为长细比，腹杆对结构的刚度贡献较大。验算了结构跨中与悬挑端的最大挠度，计算结果均满足规范要求。以1～10阶屈曲模态作为结构初始几何缺陷分布形式，计算了结构各分区的极限承载力。计算结果表明，网壳结构的最低阶屈曲模态不一定为最不利初始几何缺陷模态，应以多阶屈曲模态作为结构初始几何缺陷分布状态计算承载力，以最小值作为结构的极限承载力。

［关键词］天津滨海国际机场； 航站楼； 钢屋盖； 网壳； 应力比； 极限承载力

中图分类号：TU393.3文献标识码：A文章编号：1002-848X(2019)23-0039-05

Design for T2 terminal building steel roof of Tianjin Binhai International Airport

Qi Lin1, Zhang Wenbo1, Sun Ronglai1, Hu Xueying2, Huang Xin1

(1 Airport College, Civil Aviation University of China, Tianjin 300300, China; 2 Tianjin Architecture Design Institute, Tianjin 300074, China)

Abstract:The general situation, structural characteristics and the design parameters of T2 terminal building steel roof of Tianjin Binhai International Airport were introduced. The natural vibration periods of the structure and the maximum stress ratios of the members were calculated. The calculation results indicate that the materials are used most profitably on the base of the satisfaction of the controlling stress ratio in the structural design. The control factor of the upper and lower chord sections of the structure is the stable stress, while the control factor of the web section is the slenderness ratio, and the web contributes a lot to the rigidity of the structure. The maximum deflection of the mid span and the cantilevered end of the structure was checked, and the results met the requirements of the code. The ultimate bearing capacity of each section of the structure was calculated by taking the first to tenth order buckling modes as the initial geometric defect distribution. The results show that the lowest order buckling mode is not necessarily the most disadvantageous initial geometric imperfection mode, and the multiple buckling mode should be taken as the initial geometric imperfection distribution state to calculate the bearing capacity, and the minimum value should be taken as the ultimate bearing capacity of the structure.

Keywords:Tianjin Binhai International Airport; terminal building; steel roof; lattice shell; stress ratio; ultimate bearing capacity

*天津市教委科研计划项目（2018KJ244）。

作者简介：齐麟，博士，副教授，Email: qilin1208@163.com。