Core components of the column: the load-bearing "trunk"
2025-07-09
Rising Steel Structure
1. Column steel (H-type/box-type/lattice type)
H-type column: when the ratio of flange width to web height (b/h) is ≤1/2, it is a narrow flange (HN type), and when it is >1/2, it is a medium flange (HM type)
Box-type column: section width-to-thickness ratio (b/t) ≤40 (to prevent local buckling, b is the section width, t is the plate thickness)
Lattice column limbs: the spacing is determined by the section turning radius requirements (for example, when the limb spacing is 600mm, the turning radius increases by 25%)
2. Stiffeners (soul reinforcement)
Transverse stiffeners: spacing ≤3 times the web height (to prevent shear instability of the web, such as H-type columns with one every 1.5m)
Longitudinal stiffeners: used for box-type column webs (when t≤14mm and h/t>80 must be set, such as □800×800 column with 2 longitudinal stiffeners)
Node stiffener: set at the connection of the corbel (thickness is 2mm thicker than the corbel web to avoid stress concentration)
3.Upper connection components: "shoulder" supporting the building
1. Column top plate
Function: transfer beam end load, thickness is 3-5mm thicker than the column flange (if the flange is 20mm, the top plate is 25mm)
Connection form:
Rigid connection: full penetration welding of the top plate and the beam flange (weld grade one)
Hinged connection: elliptical hole is set on the top plate (allowing the beam end to rotate, such as secondary beam connection)
2. Corbel (load transfer hub)
Classification:
Solid corbel: H-shaped steel plate welding (bearing ≤50 tons load, such as factory crane beam corbel)
Lattice corbel: tie rods connect the limbs (bearing > 50 tons load, such as bridge support corbel)
