March 29, 2024

Grid structure member design and node construction

The cross-section of the members of the grid structure shall be determined based on the strength and stability calculations. In order to reduce the calculation length of the pressure bar and increase its stability, measures such as adding a sub-bar and a support rod may be adopted. The plate type grid frame made of steel and the nodes of the double-layer shell type grid frame mainly have three forms: a cross plate node, a welded hollow ball node and a bolt ball node. The cross-plate joint is suitable for the grid structure of the steel bar, and the connection between the rod and the gusset plate is welded or high-strength bolt connection. The hollow ball joint and the bolt ball joint are suitable for the grid structure of the steel pipe rod. The joints of the single-layer shell-type grid should be able to withstand the bending internal force. Under normal circumstances, the steel consumption of the joints accounts for 15-20% of the steel used for the entire steel grid structure.

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