Flange extension type column foot for a narrow flange steel column and construction technology of column foot

Abstract

The invention relates to a flange extension type column foot for a narrow flange steel column, and a construction technology of the column foot. The column foot is characterized in that the column foot is embedded into a reinforced concrete foundation; the column foot comprises a bottom plate arranged at the bottom end face of the steel column, and flange extension plates arranged on two side walls of two flanges of the steel column respectively; the flange extension plates are welded on the side walls of the flanges by groove complete-penetration welds, and welded with the bottom plate; vertical stiffening ribs are welded between the two opposite flange extension plates; horizontal stiffening ribs are arranged at a top port of a containing cavity; a plurality of studs are uniformly on the bottoms of outer wall surfaces of the two flanges respectively; and anchor bolts are arranged at the two ends of the bottom plate. According to the column foot, with the adoption of the horizontal stiffening ribs and the vertical stiffening ribs, the effective bearing width of an embedded part of the steel column is increased, a bending moment and a shearing force borne by an imbedded column foot node can be transferred conveniently, the embedded depth of the steel column can be reduced significantly, and the embedded depth of the foundation or a bearing platform can be further reduced. The column foot has better economic benefits in engineering practices.

Description

technical field [0001] The invention relates to a column base of a narrow flange steel column with expanded airfoil and its construction technology. Background technique [0002] The embedded column foot is to embed the steel column directly into the column foot of the reinforced concrete foundation, foundation beam, and cap. , The concrete of the platform. This method is beneficial to ensure the overall rigidity of the steel column foot and foundation, foundation beam and cap. For the embedded column foot, the most important factor affecting the bending stiffness, bearing capacity and deformation capacity of the column foot is the embedding depth of the steel column. The current domestic codes are conservative in the design of the embedding depth of column feet. Except for building structures with basements, they all face the problem that the foundation, foundation beams, caps, etc. are too large and too deep due to the excessive embedding depth of steel column feet. une...

AI Technical Summary

Problems solved by technology

The current domestic codes are conservative in the design of the embedding depth of column feet. Except for building structures with basements, they all face the problem that the foundation, foundation beams, caps, etc. are too large and too deep due to the excessive embedding depth of steel column feet. Uneconomical problems

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