沈阳南站中央站房屋盖为大跨度空间结构,采用纵、横向交叉平面管桁架体系。纵、横向交叉平面管桁架体系为一种新型的大跨度空间结构体系,采用ANSYS软件对该中央站房屋盖结构进行了特征值屈曲分析以及同时考虑几何非线性和材料非线性的有限元分析,此外还考虑了缺陷对结构整体稳定性的影响。计算分析了屋盖结构弹性以及弹塑性屈曲性能,对此种结构体系的整体稳定性做出评价。 Shenyang South Railway Station central station housing cover for the long-span space structure, the use of vertical and horizontal cross-plane pipe truss system. Longitudinal and transverse cross-section pipe truss system is a new type of large-span space structure system. By using ANSYS software, the eigenvalue buckling analysis of the roof structure of the central station and the finite element analysis considering geometric nonlinearity and material nonlinearity are carried out. In addition, the effect of defects on the overall stability of the structure is taken into account. The roof structure elasticity and elasto-plastic buckling performance are calculated and analyzed, and the overall stability of the structure system is evaluated.