汉口火车站大跨度钢结构无站台柱雨棚结构设计

Design of large-span steel structural no-platform-column canopy of Hankou Railway Station

设计了汉口火车站无站台柱雨棚,着重阐述了其结构布置和受力体系.对结构在各种荷载工况下进行了计算分析.通过优化雨棚的拱轴曲线,得到了最合理的拱轴线,从而有效降低刚架梁截面高度.计算分析了温度作用对超长大跨度拱结构的影响,结果表明温度荷载对刚架和基础均产生较大内力.从特征值屈曲和非线性屈曲两个方面,对结构的整体稳定性进行了分析,分析表明大跨度拱结构具有良好的稳定性和承载能力.

The design of a no-platform-column canopy for Hankou Railway Station is introduced;especially the structural allocation and loading system are emphasized.With the computing and analyzing the structure under different loading combinations,the most reasonable curvature of canopy is received,which could decreases the cross-sectional height of steel beam effectively.Computational results show that the temperature loading leads to large internal forces in the rigid frame and foundation for the super large-span curved structure.By the buckling analyses of both the curve of characteristic values and the nonlinear values,the entire structural stability is studied.The results show that both stability and bearing capacity of the large span arch structure are outstanding.