The "body parts" of steel columns: Deconstructing the core load-bearing components
Rising Steel Structure(I) Foundation connection components: "feet" that transmit force to the earth
1. Steel column base
Function: Spread the column load to the foundation (concrete independent foundation/pile foundation), commonly used thickness 20-50mm
Key to design:
The size is determined by the foundation compressive strength (base plate pressure ≤ concrete axial compressive strength design value)
Anchor holes need to be set on the edge (the diameter is 2-3mm larger than the anchor, which is convenient for installation and positioning)
Typical case: The base plate size of a factory steel column is 1000×1000×30, and it is connected to the foundation through 8 M30 anchor bolts
2. Column foot anchor bolts
Classification:
Hinged column foot: only transmits vertical force (anchor bolts are not subjected to tension, such as light factory column foot)
Rigid column foot: transmits bending moment at the same time (anchor bolts need to verify tension, such as the bottom of high-rise steel columns)
Material selection: Q345B Steel (tensile strength ≥ 470MPa), threaded section is hot-dip galvanized (coating ≥ 85μm)
