Advantages and disadvantages of space frame structure

The space frame structure is a form of spatial grid structure. Most of the grid knots are made of steel tubes and spherical nodes. Generally, the truss structure is divided into four categories, which are: plane truss system, quadrangle cone, triangular cone and hexagonal cone.

In the surface system of the turbine house in the main plant of the thermal power plant, a four-cone network frame is usually used. The bottom edge of the four-cone network frame is parallel or perpendicular to the boundary, and the corner cone covers the whole network frame plane.

The upper (lower) chord nodes of the grid frame are the vertices of the Angle cone set in a straight (reverse) direction, or the corner points of the bottom edge of the angle cone set in a straight (reverse) direction, so that the plane projection of the upper and lower chord in the same direction just forms two groups of parallel lines, half of the spacing of the grid.

The upper and lower chord meshes formed are usually square, but rectangular meshes can also be formed when the chord lengths of the two directions are not equal.

Advantages and characteristics of grid structure:

1. Space work, simple and convenient way of force transmission, suitable for large span, large column network roof structure.
2. The structure is light in weight and has good economic indicators.Compared with the plane steel roof frame of the same span, when the span is less than 30m, the steel amount can be saved 5~10%;when span > 30m, it can save 10~20%.
3. Large space stiffness, small dead weight of the structure and good seismic performance.
4. Simple construction and installation.The frame rod and node types are few and the size is not big.Transportation, storage, loading and unloading, assembly are more convenient.
5. Flexible layout of the grid, flat roof system, conducive to suspended ceiling, pipe and equipment installation.

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