大型机场航站楼北连接体钢结构屋盖提升施工模拟分析

Lifting Construction Simulation Analysis of the North Connector Steel Structure Roof for Large Airport Terminal

采用MIDAS Gen对北连接体屋盖网架提升、卸载、拼装对接等进行模拟,重点对施工过程分析步及位移变形结果进行研究,此外,还对单、双吊点提升架进行承载力模拟验算。结果表明:在钢屋盖杆件安装对接过程中,对接位置处x,y向最大变形≤3.93mm,z向最大变形≤38.28mm,对比钢屋盖结构安装完成后与原设计状态位移结果,x,y,z 3个方向变形差异均较大,可通过预起拱来保证安装精度;施工原结构中部分杆件存在应力比偏大情况,因此,对应力比>0.85杆件进行换杆处理,以满足施工需要;单、双吊点提升架最大水平变形、竖向变形,杆件最大应力均满足施工要求。

MIDAS Gen software was used to simulate the lifting,unloading,assembling and docking of the roof grid of the north connector,focusing on the analysis of the construction process and the results of displacement and deformation.In addition,the bearing capacity of the single and double lifting point lifting frame was simulated and checked.The results show that,during the installation and docking of steel roof rods,the maximum deformation in x,y direction is no more than 3.93mm,and the maximum deformation in z direction is no more than 38.28mm.Compared with the displacement results of steel roof structure after installation and in the original design state,the deformation differences in x,y,z directions are large,which can be ensured by pre-arch.The stress ratio of some rods in the original structure is too large,so the rods with a stress ratio greater than 0.85 are replaced to meet the needs of construction.The maximum horizontal deformation and vertical deformation of the single and double lifting point lifting frame and the maximum stress of the rod can meet the construction requirements through checking calculation.