Research on the structural scheme and complex joint of cylindrical steel roof shell with large cantilever structure and single layer oblique grid
The steel roof of the waiting hall of Tongliang Station is a spatial curved roof formed by three longitudinal and one transverse cylindrical shells intersecting each other.It adopts the single-layer latticed shell structure system with the main stressed arch and oblique rhomboidal grid.The roof is placed on eight inverted V-shaped concrete piers,and the bottom of the piers is the pile foundation.The mechanical properties of the roof and the comparative study of different strengthening measures are carried out to reveal the deformation and stress characteristics of the roof in detail.In order to take into account the structural force,building effect and saving the amount of materials,the scheme is compared and selected according to the section form and grid size of the roof members.Finally,the structure scheme of box main arch+narrow and high box secondary section is determined,and the grid size is 3×3m,and all the indexes meet the requirements.In the aspect of joint design,by adjusting the local axis of the component perpendicular to the normal direction of the roof,the joint is beautiful and feasible.The special connection design and finite element analysis are carried out to ensure the reliability of force transmission for the multi-bar column base support joints.
space steel structurelarge cantilever roofsingle layer oblique gridscheme comparisonsupport designnode finite element analysis
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