CN102877549B - A kind of steel core concrete column and the rigid connection node of girder steel - Google Patents

Abstract

The invention relates to a rigid connection node between a steel pipe concrete column and a steel beam in a steel pipe concrete structure system, including the intersection of the steel pipe concrete column and the steel beam, the steel beam extending into the steel pipe concrete column, and the steel beam at the intersection of the steel pipe concrete column The ends of the extensions of the upper and lower flange plates in the steel pipe concrete column are respectively connected to the end plates, and the upper and lower reinforcement rings are coaxially located in the steel pipe concrete column, respectively connected to the extensions of the upper flange plate and the extensions of the lower flange plate. In-plane connection, the outer peripheries of the upper reinforcement ring and the lower reinforcement ring are connected in-plane with the inner wall of the steel pipe concrete column. The invention makes the stress of the nodes more reasonable, safe and reliable, the construction is more convenient and the quality is easy to ensure, and the economic performance is obviously improved.

Description

A Rigid Connection Node Between Steel Tube Concrete Column and Steel Beam

technical field

The invention relates to the field of civil structural engineering, in particular to a joint form adopted for rigid connection between a steel pipe concrete column and a steel beam in a steel pipe concrete structure system when the steel pipe concrete column is arranged.

Background technique

The steel tube concrete structure has the advantages of high bearing capacity, good seismic performance, and convenient construction. It can adapt to the needs of modern engineering structures to develop into large-span, high-rise, heavy-load and withstand harsh conditions, and meets the industrial requirements of modern construction technology. Therefore, in the past ten years It has been popularized and applied in high-rise buildings and has developed very rapidly.

In the CFST structure, when the diameter of the CFST column is small, the rigid connection between the steel beam and the CFST column can be connected by an external reinforcement ring, and the external reinforcement ring is a closed full ring around the CFST column; When the diameter is large, the rigid connection between the steel beam and the CFST column can be connected by an inner reinforcing ring.

According to the existing literature, when the internal reinforcement ring connection method is adopted in the larger-diameter CFST column, since the slab width of the reinforcement ring must be greater than or equal to 0.25 times the diameter of the CFST column, the amount of steel used in the joint area is relatively large, and the economic performance At the same time, when the width of the inner reinforcing ring is large, it will affect the pouring quality of the concrete in the steel pipe column.

Contents of the invention

In order to overcome the shortcomings of the above joint forms, the main purpose of the present invention is to provide a joint construction form with reasonable force, convenient construction, safety and economy.

In order to solve the problems of the technologies described above, the basic scheme adopted in the present invention is as follows:

A rigid connection node between a steel pipe concrete column and a steel beam, comprising the intersection of a steel pipe concrete column and a steel beam, the steel beam extending into the steel pipe concrete column, and the upper and lower flanges of the steel beam in the steel pipe concrete column The ends of the plate extensions are respectively connected to the end plates, and the upper and lower reinforcement rings are coaxially located in the concrete-filled steel tube column, and are respectively connected to the upper and lower flange plate extensions in the plane, and the upper reinforcement ring and the outer periphery of the lower reinforcing ring are connected in plane with the inner wall of the steel pipe concrete column.

The above technical solution is optimized for the existing steel pipe column-beam joints. The inner reinforcement ring adopts a segmented method, and thicker plates are used in the parts where the force is required, and structural thickness plates are used in the secondary parts of the force; the width of the reinforcement ring is It can break through the restriction on the width of the ring plate in the prior art, and the width can be less than 0.25 times the diameter of the steel pipe concrete column. The smaller width of the reinforcing ring will enable the concrete pouring construction to proceed more smoothly, and is beneficial to the control of construction quality.

The flange extension section in the above technical solution is determined according to the requirements of strong nodes and weak members, and its width and thickness are determined according to structural requirements and calculation conditions.

The size of the end plate in the above technical solution can be adjusted and determined according to the force characteristics of the column-beam joint, and the size (width, height and thickness) of the end plate must meet the requirements for rigid constraints on the end of the steel beam.

Based on the above basic scheme, depending on the connection between the steel pipe concrete column and the steel beam, a vertical stiffener can be arranged between the upper reinforcement ring and the lower reinforcement ring, and one side of the vertical stiffener is connected to the steel pipe concrete The inner wall of the column is connected. Of course, vertical stiffeners may also not be arranged.

The invention is especially suitable for large-diameter steel pipe concrete column-beam joints, and adopts the combined connection joint form of a reinforcing ring and an end plate, which not only saves materials, but also meets the stress requirements of the joints. The end plate can satisfy the strong constraint condition on the steel beam under the condition of smaller specifications and the condition of dense filling concrete.

The present invention carries out structural analysis and structural tests on the larger-diameter concrete-filled steel tube column-beam joints, and the construction mode makes the joint force more reasonable, safe and reliable, the construction is more convenient and the quality is easy to ensure, and the economic performance is obviously improved.

Description of drawings

Figure 1 is a plan view of the structure of the present invention.

Fig. 2 is a sectional view of A-A in Fig. 1 .

detailed description

As shown in Figure 1 and Figure 2, the manufacturing and assembling steps of the embodiment of the present invention are as follows:

1. The steel tube concrete column 1 that meets the design requirements is formed by coiling the plate and performing splicing and welding.

2. In the steel tube concrete column 1, weld the positioned upper reinforcement ring 3a and the lower reinforcement ring 3b, the upper flange plate extension 4a and the lower flange plate extension 4b and the stiffener 6 between the upper and lower reinforcement rings; At the same time, the splicing section corresponding to the steel beam 2 is welded outside the steel pipe concrete column 1 according to design requirements.

3. In the joint of the present invention, the end plates 5 are welded. As shown in the figure, the end plates 5 are respectively located at the ends of the upper flange plate extension 4a and the lower flange plate extension 4b.

4. After completing the construction quality inspection related to the steel structure and passing the acceptance, the concrete pouring in the CFST column 1 is carried out. If a steel core column is additionally arranged in the large-diameter concrete-filled steel tube column, the steel core column should be hoisted first, and the concrete construction should be carried out after the steel core column is qualified.

The above detailed introduction to the solutions provided by the embodiments of the present invention, for those of ordinary skill in the art, there will be changes in specific implementation methods and application scopes based on the ideas of the embodiments of the present invention. To sum up, the contents of this specification should not be construed as limiting the present invention, and any changes made according to the design concept of the present invention are within the scope of protection of the present invention.

Claims (2)

1. steel core concrete column and a rigid connection node for girder steel, including steel core concrete column (1) and girder steel (2), described Steel core concrete column (1) intersect with girder steel (2), described girder steel (2) extends in described steel core concrete column (1), its feature It is: the described girder steel (2) top flange plate extension (4a) in described steel core concrete column (1) and bottom wing listrium extension (4b) end is connected with end plate (5) respectively, and upper reinforcing ring (3a) and lower reinforcing ring (3b) are coaxially located at described concrete filled steel tube In post (1), be planar connected with described top flange plate extension (4a) and bottom wing listrium extension (4b) respectively, described on add Strong ring (3a) and the periphery of lower reinforcing ring (3b) are planar connected with the inwall of described steel core concrete column (1).

A kind of steel core concrete column the most according to claim 1 and the rigid connection node of girder steel, it is characterised in that: described Vertical ribbed stiffener (6), a side of described vertical ribbed stiffener (6) and institute are set between upper reinforcing ring (3a) and lower reinforcing ring (3b) The inwall stating steel core concrete column (1) connects.