济青高铁青岛红岛站钢屋盖结构设计

Structural design of steel roof of Qingdao Hongdao Railway Station of Jinan-Qingdao High-speed Railway

济青高铁青岛红岛站站房采用建桥合一的钢-钢筋混凝土混合框架结构。广场层、承轨层与两条正线桥之间设缝脱开,候车层按不设缝设计。高架候车层上的钢屋盖为保证使用功能整体不设缝,中部采用倒三角形空间管桁架,南北浪花造型采用空间网格结构,二者之间通过矩形过渡桁架连成一个整体。结构设计时,进行了温度作用单工况分析、多点输入地震反应时程分析补充计算、钢屋盖整体稳定分析、钢屋盖极端荷载受力分析、钢屋盖施工模拟分析、典型节点有限元分析,还进行了结构罕遇地震动力弹塑性分析、防连续倒塌分析等。分析结果表明,钢屋盖结构设计安全合理、抗震性能良好。

The station building of Qingdao Hongdao Railway Station of Jinan-Qingdao High-speed Railway adopts a steel-reinforced concrete hybrid frame structure combined with bridge-station combined structure.The square layer,rail-bearing layer and the elevated two main bridges are separated by joints,and the elevated waiting layer is designed without joints.In order to ensure the use of the steel roof on the elevated waiting layer,there are no joints in the whole.The middle part adopts a inverted triangle space tube truss.Wave-shaped structures at the north and south entrance adopt a spatial grid structure,and they are connected as a whole by a rectangular transition truss.In the structural design,the single working condition analysis of temperature effect,supplementary calculation of multi-point input seismic response time-history analysis,overall stability analysis of steel roof,extreme load stress analysis of steel roof,steel roof construction simulation analysis,finite element analysis of typical joints,dynamic elastoplastic analysis of the structure under rare earthquakes,progressive collapse prevention analysis,etc.were carried out.The analysis results show that the steel roof structure is safe and reasonable in design and has good seismic performance.