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  

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

作　　者：方辉 夏心红 FANG Hui;XIA Xinhong(Hunan Architectural Design Institute Group Co.,Ltd.,Changsha 410012,China)

机构地区：[1]湖南省建筑设计院集团股份有限公司,长沙410012

出　　处：《建筑结构》2022年第22期7-10,78,共5页Building Structure

基　　金：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)。

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MIDAS Gen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。In order to analyze the anti-progressive collapse resistance of the departure hall steel floor of T2 terminal building of Huanghua International Airport in Changsha,the member removal method was adopted,and the three-dimensional finite element model of the large-span steel frame roof structure was established using MIDAS Gen.The linear static analysis method was used to calculate the stress and deformation of the remaining structure after the demolition of key members,and the progressive collapse risk of the structure was evaluated.The analysis results show that the departure hall steel floor of T2 terminal building of Huanghua International Airport in Changsha has good resistance to anti-progressive collapse.When a 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 side structure.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 above A3 and the longitudinal chord above the double V-shaped column are the weak parts of the structure.Corresponding reinforcement measures shall be taken for these positions in the subsequent management.

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 

分 类 号：TU391[建筑科学—结构工程]