(湖南省建筑设计院集团股份有限公司, 长沙 410012)

摘要: 为了分析长沙黄花国际机场 T2 航站楼出发大厅钢屋盖的抗连续倒塌性能,采用了拆除构件法,在 MIDASGen 上建立了屋盖大跨度钢框架结构的三维有限元模型,利用线性静力分析方法计算关键构件拆除后剩余结构的应力和变形,对结构进行连续倒塌风险评估。 分析结果表明:长沙黄花国际机场 T2 航站楼出发大厅屋盖钢结构具有良好的抗连续倒塌能力,当单根关键构件失效时,剩余结构都能保持安全状态不会发生连续倒塌,双 V 形钢柱具有较大的安全储备,不会因为单侧结构破坏导致整体柱失效;内部圆柱相较于双 V 形钢柱对结构的抗连续倒塌性能影响较大;C1 上方横向腹杆、A3 上方纵向腹杆和双 V 形钢柱上方纵向弦杆为结构的薄弱部位,后续的管理中针对这些位置要采取相应的加固措施。

关键词: 长沙黄花国际机场; 大跨度钢框架结构; 防连续倒塌; 拆除构件法; 静力分析法

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)22-0007-04

DOI:10. 19701 / j. jzjg. ZJ220061

Analysis of anti-progressive collapse resistance of departure hall steel floor of T2 terminal building of Huanghua International Airport in Changsha

FANG Hui, XIA Xinhong

(Hunan Architectural Design Institute Group Co. , Ltd. , Changsha 410012, China)

Abstract: In order to analyze the anti-progressive collapse resistance of the departure hall steel floor of T2 terminal buildingof Huanghua International Airport in Changsha, the member removal method was adopted, and the three-dimensional finiteelement model of the large-span steel frame roof structure was established using MIDAS Gen. The linear static analysismethod was used to calculate the stress and deformation of the remaining structure after the demolition of key members, andthe progressive collapse risk of the structure was evaluated. The analysis results show that the departure hall steel floor ofT2 terminal building of Huanghua International Airport in Changsha has good resistance to anti-progressive collapse. Whena single key member fails, the remaining structure can maintain a safe state without progressive collapse, and the double Vshaped column has a large safety reserve and will not lead to the failure of the whole column due to the damage of one sidestructure. Compared with double V-shaped columns, the internal circular columns have a greater impact on the antiprogressive collapse resistance of the structure; The transverse web member above C1, the longitudinal web member aboveA3 and the longitudinal chord above the double V-shaped column are the weak parts of the structure. Correspondingreinforcement measures shall be taken for these positions in the subsequent management.

Keywords:Huanghua International Airport in Changsha; large-span steel frame structure; anti-progressive collapse;member removal method; static analysis method

∗湖南省建筑设计院集团股份有限公司科技研发课题(KY0200-0000-2009-0237)。

第一作者:方辉,博士,研究员级高级工程师,主要从事钢结构、超高层建筑、装配式建筑设计,Email:fangh@ hnadi. com. cn。

[引用本文] 方辉,夏心红. 长沙黄花国际机场 T2 航站楼出发大厅钢屋盖抗连续倒塌分析[ J]. 建筑结构,2022,52(22):7-10,78. FANG Hui,XIA Xinhong. Analysis of anti-progressive collapse resistance of departure hall steel floor ofT2 terminal building of Huanghua International Airport in Changsha[J]. Building Structure,2022,52(22):7-10,78.