太原南站站房主体结构设计与分析

Structural design and analysis on the main building in South Taiyuan Railway Station

太原南站主站房为地上2层(局部3层)、地下1层的框架结构。屋盖结构采用伞状桁架结构+X形钢柱的结构体系,不仅与建筑形态吻合,而且结构受力合理,具有一定的独特性。大跨度高架层和商业夹层采用钢桁架结构,具有良好的经济性和抗震性能。站台层为线侧结构,采用经济合理的预应力混凝土楼盖结构,结构构件布置均匀,截面选用合理,增加了出站厅的净高,体现了混凝土楼盖结构的美观。X形钢管混凝土柱与预应力混凝土梁节点中采用合理的结构措施,确保节点安全。整体分析和对复杂结构构件和节点进行非线性有限元分析表明,结构具有良好的安全性和经济性。

The main building in South Taiyuan Railway Station is a 2-storey（partly 3-storey）frame with 1-storey basement.The roof structure with the shape of umbrella consists of steel truss,steel beam and steel columns with X cross-section,and the roof structure coincides with the architectural appearances and has unique style.The steel trusses and CFST columns for the large-span waiting hall have good aseismic performances and are economical.The PRC beams and RC columns or CFST columns with X cross-section are used for the 1st floor（platform floor）.On this floor,uniformly distributed beams with appropriate cross sections can raise the net height of the passengers＇ exit area in the basement,and show the structural aesthetics.The joints between CFST columns with X cross-section and PRC beams were appropriately designed to ensure the safety and economy.The linear analysis on the whole structure and the nonlinear analysis on complicated components and joints by FEM lead to the good structural safety and economy.