Design and full scale model test research on super multi rod connection nodes of Xiangyang East Railway Station steel roof
The roof of Xiangyang East Railway Station is 358m long in the north-south direction,with a maximum span of 86m in the east-west direction.The welded spherical steel grid structure is adopted,without deformation joints on the whole.A waterfall shape large hole is set at the south end of the roof.Due to the super long,discontinuous,large overhang and waterfall shape of the roof structure,the spatial stress of the steel roof is very complex.In particular,stiffeners were set at the top of the bifurcated column along the north-south direction to strengthen the restraint stiffness of the opening edge of the roof waterfall area and improve the overall mechanical performance of the structure.The number of connecting members at the cantilever end of the steel roof in the waterfall area is up to 12.As the key node of the roof structure,the stress state of this node is particularly complex.The connection type of partially cast and partially welded was innovated and structural strengthening measures were taken.A full scale model loading test was carried out for this super multi rod connection node.The test loading device,loading scheme,test phenomena and test results were introduced in detail,and the finite element comparative analysis was carried out.The results show that the results of finite element comparative analysis and loading test are in good agreement;the partially cast and partially welded joint for the super multi connecting members has reasonable structure and high bearing capacity.The weak parts appear on the lengthened steel pipe connected with the casting body,meeting the design requirements of strong node weak members and strong connection weak members.
large-span structurewaterfall shaped steel roofsuper multi rod connection nodepartially cast and partially weldedfull scale model test
NETL
NSTL
万方数据
维普
