星火TOD交通枢纽结构设计

Structural design of Xinghuo TOD transportation hub

星火TOD交通枢纽地下5层、地上2层,包括站厅层、站台层、枢纽大厅等。考虑了地下结构与地上结构与岩土的非线性动力特征,采用了反应位移法对地铁站部位进行抗震设计,并采用了岩土与结构三维动力时程法进行地下结构整体抗震校核设计,更加真实地反映了岩土的动力特性和结构的空间效应。枢纽大厅钢结构采用网格巨柱、斜支撑及周边钢柱支承的单层菱形网格钢网壳体系,采用有限元分析方法、考虑双非线性的极限承载力分析等方法进行设计。结果表明:通过上述设计方法可以保证结构的刚度、承载力、稳定性均满足规范要求。

The project of Xinghuo TOD transportation hub has five floors underground and two floors above ground,including station hall floor,platform floor,hub hall,etc.The nonlinear dynamic characteristics of underground structure,aboveground structure and geotechnical were considered.The response displacement method was used for the seismic design of the subway station,and the three-dimensional dynamic time history method of geotechnical and structure was used for the overall seismic check design of the underground structure,which more truly reflects the dynamic characteristics of geotechnical and the spatial effect of structure.The steel structure of the hub hall adopts the single-layer diamond grid steel reticulated shell system supported by grid giant columns,inclined supports and surrounding steel columns.The finite element analysis and ultimate bearing capacity analysis considering dual nonlinearity were adopted for the design.The results show that the stiffness,bearing capacity and stability of the structure can meet the requirements of the standard through the above design methods.