CN-224228104-U - Externally connected channel steel-hollow sandwich steel pipe superposed column connected by bolts

Abstract

The utility model relates to a steel pipe mixed superposed column, in particular to an external channel steel-hollow sandwich steel pipe superposed column connected by bolts, which comprises an outer steel pipe, wherein an inner steel pipe is arranged in the center of the outer steel pipe, and a reinforcement cage is arranged on the outer side of the outer steel pipe, the outer steel pipe is connected with the reinforcement cage through channel steel, and outer concrete is poured between the outer steel pipe and the reinforcement cage. The utility model has the advantages that all the steel member inner steel pipes, the outer steel pipes, the channel steel and the reinforcement cage are prefabricated in a factory, and the modular assembly is realized through the high-strength bolts, so that the field welding operation is avoided. The construction period is shortened by about 30% -50%, manual operation errors are obviously reduced, joint connection accuracy is guaranteed, and the millimeter-level alignment of the channel steel flange bolt holes and the outer steel pipe holes and the millimeter-level alignment of the channel steel web connection holes can be realized.

Inventors

• YANG JUNSHAN
• ZHANG SHU
• MA YUE
• JIANG YANG
• QU WUJIANG
• FU MINGCHUN
• REN DAPENG
• ZHANG CHUNLING
• DUAN ZENGHUI

Assignees

• 大连海洋大学

Dates

Publication Date

20260512

Application Date

20250410

Claims (10)

1. 1. The utility model provides an external channel-section steel-cavity intermediate layer steel pipe coincide post of adoption bolted connection, includes outer steel pipe (3), and its characterized in that is equipped with in the center of outer steel pipe (3) steel pipe (1), is equipped with steel reinforcement cage (5) in outer steel pipe (3) outside, is connected through channel-section steel (4) between outer steel pipe (3) and steel reinforcement cage (5), has pour outside concrete (7) between outer steel pipe (3) and steel reinforcement cage (5).
2. 2. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolted connection is characterized in that the end faces of the inner steel pipe (1), the outer steel pipe (3), the channel steel (4) and the steel reinforcement cage (5) are flat, and the geometric centers of the inner steel pipe (1), the outer steel pipe (3) and the steel reinforcement cage (5) are coincident.
3. 3. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 1 or 2, which is characterized in that the outer steel pipe (3) is round, square, hexagonal or octagonal, and the inner steel pipe (1) is round or square.
4. 4. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 1 or 2 is characterized in that the channel steel (4) is a pair, and the webs of the two channel steel (4) are fixedly connected by a high-strength bolt pair (9) to form an H shape.
5. 5. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection is characterized in that a hole is formed in one side of the lower flange of each channel steel (4) connected with the outer steel pipe (3), the lower flange is connected with the column wall of the outer steel pipe (3) through a high-strength bolt (8), and a bolt (6) is arranged on one side of the upper flange of the channel steel (4) connected with the outer concrete (7).
6. 6. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolted connection is characterized in that the channel steel (4) is uniformly arranged around the outer steel pipe (3) and the number of the channel steel is 4-8 pairs.
7. 7. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 1 or 2 is characterized in that core concrete (2) is poured between the outer steel pipe (3) and the inner steel pipe (1).
8. 8. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 1 or 2, wherein the steel reinforcement cage (5) can be made of common steel bars, high-strength steel bars or prestressed steel bars.
9. 9. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 6 is characterized in that the channel steel (4) is made of common steel or high-strength steel.
10. 10. The externally connected channel steel-hollow sandwich steel pipe superposed column adopting the bolt connection according to claim 7 is characterized in that the core concrete (2) and the outer side concrete (7) are ordinary concrete, high-strength concrete or self-compacting concrete.

Description

Externally connected channel steel-hollow sandwich steel pipe superposed column connected by bolts Technical Field The utility model relates to a steel pipe mixed superposed column, in particular to an external channel steel-hollow sandwich steel pipe superposed column connected by bolts, and belongs to the field of buildings. Background Concrete filled steel tubes are a critical combined structural form and play a key role in the field of building engineering. The concrete composite material has the core advantages that the steel pipe has an effective restraining effect on concrete, so that the two materials are stressed cooperatively, and the respective advantages are fully exerted. The structure has the remarkable characteristics of high bearing capacity and high ductility, and engineering practice has fully proved the remarkable performance in the aspects of economic benefit and building effect. In recent years, students at home and abroad focus on improvement of the performance of a concrete filled steel tube structure for a long time. In this context, concrete filled steel tubes have been developed. The structure is formed by combining internal steel pipe concrete and peripheral reinforced concrete, and can be subdivided into three types of square sleeve circles, square sleeve squares and round sleeve circles according to different cross section forms. The innovative structure further integrates the advantages of different materials, and has excellent mechanical properties and application potential in some building projects. However, as modern architecture moves to higher and ultra high floors, concrete filled steel tube composite structures face new challenges. The increase in building height causes a significant increase in the dead weight of the structure, which is particularly pronounced in low-rise columns, which can lead to brittle shear failure, posing a serious threat to the safety of the structure. Therefore, how to effectively reduce the dead weight on the premise of ensuring the structural safety becomes a key research subject in the field of soil and wood factories. The method not only needs to carry out deep research in aspects of material characteristics, structural design and the like, but also needs to be combined with practical engineering cases to explore a feasible solution so as to promote wider application of the steel tube concrete composite structure in high-rise buildings. Compared with the traditional solid column, the hollow structure system shows lower gravity second-order effect under the action of earthquake, the unique mass distribution characteristics of the hollow structure system not only obviously reduce the dead weight of the structure, but also effectively improve the bending and torsion resistance bearing capacity by increasing the radius of gyration of the section. However, intensive studies on hollow steel tube concrete composite columns show that obvious gradient mutation of material properties exists between the outer layer reinforced concrete and the core steel tube concrete system, and the difference is specifically expressed by that the elastic modulus difference is 2-3 times, the poisson ratio deviation exceeds 40%, and then the phenomenon of interface sliding and stress concentration is caused. This uncoordinated deformation mechanism severely restricts the ductility exertion of the column, making the material strength utilization generally lower than 65%. The utility model provides an external channel steel-hollow sandwich steel pipe superposed column connected by bolts, which combines the advantages of a steel pipe concrete superposed column and a steel reinforced concrete column: and the channel steel is added into the outer reinforced concrete of the steel pipe concrete superposed column and is connected with the outer steel pipe through the high-strength bolt, and the mechanical property of the concrete outside the steel pipe is improved by utilizing the constraint effect of the channel steel flange, so that the deformation performance and the mechanical property of the concrete inside and outside the steel pipe are better cooperated. Disclosure of Invention The utility model provides an external channel steel-hollow sandwich steel pipe superposed column connected by bolts, aiming at improving the mechanical property and the ductility of the superposed column. The utility model provides an external channel steel-hollow sandwich steel pipe superposed column connected by bolts, which comprises an outer steel pipe, wherein an inner steel pipe is arranged in the center of the outer steel pipe, a steel reinforcement cage is arranged on the outer side of the outer steel pipe, the outer steel pipe is connected with the steel reinforcement cage by channel steel, and outer concrete is poured between the outer steel pipe and the steel reinforcement cage. The end faces of the inner steel pipe, the outer steel pipe, the channel steel and the steel reinforcement c