Concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure and construction method thereof

Abstract

The invention relates to a concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure. The concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure comprises two column limbs and a reinforced concrete board connected between the column limbs, wherein the column limbs are both composed of steel pipe concrete columns and column concrete-encasing layers, the steel pipe concrete columns both comprise pipe inner concrete and steel pipes, the reinforced concrete board comprises node blocks, steel bars and a filled concrete layer, the node blocks are connected with the steel pipes and are arranged many at intervals in the axial direction of the steel pipes, and the two ends of the steel bars are connected with the corresponding node blocks on the adjacent steel pipes correspondingly. The concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure is simple in structure and has the advantages of fire prevention, corrosion prevention, high bearing capacity and good durability.

Description

technical field [0001] The invention relates to a dumbbell-shaped column structure of outsourcing concrete double-leg steel pipe concrete and a construction method thereof. Background technique [0002] In the existing factory building structure, when the double-leg concrete-filled steel tube dumbbell-shaped column is subjected to heavy loads, it is generally necessary to increase the size of the section or use thick-walled steel. The local stability of the large-section column and the welding problems caused by thick-walled steel will cause problems adversely affect the structural bearing capacity. At present, the double-leg concrete-filled steel tube dumbbell-shaped column has limited load bearing, poor fire resistance, poor corrosion resistance, and weak rigidity. These shortcomings affect and limit the application of the double-leg steel-filled steel tube concrete-filled dumbbell-shaped column in various buildings. Contents of the invention [0003] In view of the def...

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Problems solved by technology

[0002] In the existing factory building structure, when the double-leg concrete-filled steel tube dumbbell-shaped column is subjected to heavy loads, it is generally necessary to increase the size of the section or use thick-walled steel. The local stability of the large-section column and the welding problems caused by thick-walled steel will cause problems Detrimental effect on the bearing capacity of the structure

At present, the double-leg concrete-filled steel tube dumbbell-shaped column has limited load bearing, poor fire resistance, poor corrosion resistance, and weak rigidity. These shortcomings affect and limit the application of double-leg steel-filled steel tube concrete-filled dumbbell-shaped columns in various buildings.

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