Why is it Better to Use a Single Ridge and a Double Slope than a Multi-ridge?

—Multi - span door frame

1. For a multi-span rigid frame, under the same span condition, the amount of steel used for the multi-ridge multi-slope and the single-ridge double-slope is roughly the same, and it is often used as a large double-roofed roof of a ridge. This is because the metal profiled steel roofing creates conditions for long slope drainage. The inner gutter of the multi-ridge and multi-slope frame is prone to leakage and snow accumulation. The problem of unequal height frame is more serious, and this form of rigid frame should be avoided in practical projects.

steel portal frame building

2. Determination of the span of the portal frame and determination of the axis of the column.

The span of the portal frame takes the distance between the transverse rigid columns, and the span should be 9-36m. It should be 3m, but it is not limited by the modulus. When the width of the column edges is not equal, the outside should be aligned.

The column axis can take the vertical axis at the center of the lower end (smaller end) of the column, and the positioning axis of the industrial building side column takes the column outer skin.

3. Variable section portal frame to determine the analysis method of various internal forces.

For the variable-section portal frame, the elastic analysis method should be used to determine various internal forces. Only when the beam-columns of the rigid frame are all equal sections, the shaping analysis method is allowed, but the latter case is rarely used in practical engineering. use.

4. When the internal force analysis of the portal frame is carried out, the rigid frame is usually treated as a planar structure, and the skin effect is generally not considered.

5. The skin effect of the roof panel.

 

The skinning effect is to treat the roof slab as a deep beam that extends along the entire length of the roof and can be used to withstand loads in the plane. The panel can be viewed as a web that receives lateral shear forces in the plane, and the edge members can be viewed as flanges that are subjected to axial tension and pressure.

Do you want to know Analysis of Steel Cooling Plant in Summer?

 

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