The supporting method of steel grid structure can be divided into: nearby supporting grid, three-sided supporting grid, supporting grid on both sides, point supporting grid and the grid combining the nearby supporting grid and the point supporting grid.
1.Nearby support grid refers to all nodes on the boundary near the grid are support nodes, and the support nodes can be supported on the top of the column, and can also be supported on the contact main beam. This method of grid force transmission is immediate, the support is symmetrical, and it is a widely selected support method.
2.The three-sided supporting grid refers to the three-sided supporting grid when one of the edge nodes of the rectangular frame building is required to be designed into an open entrance passage due to the need for production and manufacturing, or when a certain side is not suitable for the layout of load-bearing prefabricated components due to the provisions of the building function.
3.The supporting grid on both sides refers to the quadrilateral grid that can only be designed into a support on the nodes on both sides of its relativity, and the other two sides are arbitrary edges, and this kind of grid support method is rarely used.
4.The setting standard of the point support grid is to reduce the positive bending distance and stiffness, so that the internal power of the whole grid tends to be symmetrical, and the length of the cantilever should take 1 3 of the middle span, and the length of the cantilever should take the 1 4 of the middle span for the more support of the overhang.
5.The grid that the nearby support grid and the point support grid combine is the basic that refers to the nearby support, and the middle support point is added in the building building, so that the internal power high value and stiffness of the grid frame member can be reasonably reduced. This method is very suitable for engineering buildings such as large column mesh workshops, warehouses, exhibition halls, etc.
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