Double-limb splicing thin-walled cold-formed steel efficient component

Abstract

The invention discloses a double-limb splicing thin-walled cold-formed steel efficient component. The double-limb splicing thin-walled cold-formed steel efficient component comprises two sigma-shaped web cold-formed thin-wall complex lipped steel channel opening components which is composed of upper webs, stiffening ribs, lower webs, flange edges, crimped edges and recrimped edges. The double-limb splicing thin-walled cold-formed steel efficient component is characterized in that the sigma-shaped web cold-formed thin-wall complex lipped steel channel opening components are spliced into in a back-to-back or face-to-face manner, and the connecting manner is that the upper webs and lower webs are connected through tapping screws, or the crimped edges are welded together in a welding manner. The double-limb splicing thin-walled cold-formed steel efficient component disclosed by the invention has the advantages that when the double-limb splicing thin-walled cold-formed steel efficient component is utilized as a compression member, the ratio of height to thickness of the webs is obviously reduced in a back-to-back double-limb splicing manner, the compressive capacity of the component is obviously strengthened, and the bearing capacity of the spliced components is obviously improved compared with the sum of bearing capacities of two single limb components; compared with the single limb component, the double-limb splicing thin-walled cold-formed steel efficient component has the advantages that the defects that the antitorque capacity of a single limb opening component is poor, the difference of the inertia moments of two main shafts is large and the like are overcome, the multi-time buckling of a steel plate also can provide the strong ring constraint on the interior concrete, the tightening ring force of the concrete is strengthened, and thus the bearing capacity of a compound section is improved.

Description

technical field [0001] The invention relates to the technical field of cold-formed thin-walled steel components, in particular to a high-efficiency cold-formed thin-walled steel component with two limbs. technical background [0002] Cold-formed thin-walled steel refers to the steel that bends thinner steel plates or strips into various cross-sectional forms by rolling or stamping at room temperature. The structure of cold-formed thin-walled steel members is light in weight, easy to transport and install The labor intensity is low, which can reduce the cost of the structure and foundation, and meet the assembly requirements. Compared with the hot-rolled steel with the same area, the cross-section of cold-formed thin-walled steel is flexible and diverse, and it is easier to process and shape. Its radius of gyration can be increased by 50%. Above, the moment of inertia and area moment can be increased by about 50-180%, so the mechanical and physical properties of the material ...

AI Technical Summary

Problems solved by technology

However, at present, for single-leg members in the form of splicing, the cross-section is mostly C-shaped channel steel or ordinary beveled channel steel, and the web height and thickness are relatively large. Instability damage directly affects the stability of the entire split section

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