Steel tube-concrete composite structure

Abstract

The invention relates to a steel tube-concrete composite structure which comprises steel tubes. The structure is characterized in that the steel tubes are internally or / and externally provided with self-compacting concrete, and the self-compacting concrete and the steel tubes are consolidated and hardened into a whole, thus the traditional structure that the steel tubes are internally filled with the concrete can be combined, and the steel tube-concrete structure that the steel tubes are internally or / and externally covered with a layer of concrete can also be manufactured. The structure has the characteristics of high bearing capacity, good ductility, excellent shock resistance, convenient construction, great reduction of the construction period, benefit to the fire resistance and the fireproofing of the steel tubes, corrosion resistance superior to that of a steel structure, and the like, has obvious environmental benefits, economic benefits and social benefits, can give perfect play to the advantages of high bearing capacity, large rigidity, light weight, good plasticity and toughness, shock resistance, high fatigue resistance, good shock resistance, and the like of the steel tube concrete and is suitable for various tube, pile and column structures, and particularly for various deformed tube, pile and column structures and the structures having high requirement on the bearing capacity.

Description

(1) Technical field [0001] The invention relates to a composite structure of steel pipe concrete. (2) Background technology [0002] When building concrete structures, the existing ordinary circular steel pipe concrete composite structures have many advantages that reinforced concrete structures and steel structures cannot match, with high bearing capacity, high rigidity, light weight, good plasticity and toughness, impact resistance and fatigue resistance. Due to the advantages of high strength and good earthquake resistance, the CFST structure is gradually being used in various civil engineering projects such as high-rise buildings, bridge engineering, and special structures. Its practicability and superiority are becoming more and more obvious, and it has a very good application prospect. However, the existing concrete-filled steel pipe structure has a single shape and structure, which is difficult to meet the changing architectural functional requirements. At the same ti...

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Problems solved by technology

[0002] When building concrete structures, the existing ordinary circular steel pipe concrete composite structures have many advantages that reinforced concrete structures and steel structures cannot match, with high bearing capacity, high rigidity, light weight, good plasticity and toughness, impact resistance and fatigue resistance. Due to the advantages of high strength and good earthquake resistance, the CFST structure is gradually being used in various civil engineering projects such as high-rise buildings, bridge engineering, and special structures. Its practicability and superiority are becoming more and more obvious, and it has a very good application prospect. However, the existing concrete-filled steel pipe structure has a single shape and structure, which is difficult to meet the changing architectural functional requirements. At the same time, the construction requirements and cost are high, and ordinary concrete cannot be poured into the concrete, resulting in concrete faults or segregation inside. , so that only the steel pipe of concrete filled steel pipe plays the role of supporting and bearing force, while the concrete itself only plays a part of filling, and cannot be well combined with the steel pipe to form components to play a role together, and it does not have a good bearing capacity. It has the advantages of high rigidity, light weight, good plasticity and toughness, high impact resistance and fatigue resistance, and good shock resistance. Therefore, it is urgent to develop a new type of steel tube concrete composite structure.

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