Rigid connection joint of square steel pipe column and reinforced concrete column

Abstract

The utility model belongs to the field of building structures, and provides a rigid connection node of a square steel pipe column and a reinforced concrete column, which comprises an embedded steel plate, cross-shaped steel and a plurality of anchor bars, the cross-shaped steel and the anchor bars are both pre-buried in a reinforced concrete column, the pre-buried steel plate is fixedly arranged on the top of the reinforced concrete column, the cross-shaped steel and the anchor bars are both located below the pre-buried steel plate, and the top ends of the cross-shaped steel and the top ends of the anchor bars are both fixed to the pre-buried steel plate. And the embedded steel plate is fixed with the square steel pipe column. The rigid connection node can effectively solve the problem that when the size of the square steel pipe column on the upper portion is close to the size of the reinforced concrete column on the lower portion, a traditional embedded type or outer wrapping type method is not suitable, rigid connection between the square steel pipe column and the reinforced concrete column can be achieved, column bottom bending moment, axial force and shearing force of the square steel pipe column can be effectively transmitted, stress is reasonable, and the service life of the square steel pipe column is prolonged. Installation is convenient, and enough rigidity is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of building structures, and in particular relates to a rigid connection node between a square steel tube column and a reinforced concrete column. Background Art

[0002] In recent years, with the continuous development of the economy, various types of high-rise factories and office buildings have emerged one after another. The owners have higher and higher requirements for architectural shapes. It is common to see steel frames on large roofs, which involve steel pipe columns standing up from reinforced concrete columns. In the prior art, the rigid connection between steel pipe columns and reinforced concrete columns is generally more common with external column bases or embedded column bases. These two methods are suitable for the case where the size of the reinforced concrete column is larger than the size of the steel pipe column, but are not applicable to the case where the size of the steel pipe column is close to that of the reinforced concrete column. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a rigid connection node between a square steel tube column and a reinforced concrete column, which solves the problem that the traditional embedded or outsourced methods are not applicable when the size of the upper square steel tube column is close to the size of the lower reinforced concrete column.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rigid connection node between a square steel tube column and a reinforced concrete column, comprising a pre-buried steel plate, a cross-shaped steel, and a plurality of anchor bars;

[0005] The cross-shaped steel and the anchor bars are both embedded in the reinforced concrete column, the embedded steel plate is fixedly arranged on the top of the reinforced concrete column, the cross-shaped steel and the anchor bars are both located below the embedded steel plate, the top end of the cross-shaped steel and the top end of the anchor bars are both fixed to the embedded steel plate, and the embedded steel plate is fixed to the square steel pipe column.

[0006] Preferably, the projections of the cross-shaped steel and the embedded steel plate on the top of the reinforced concrete column are both located at the center of the top of the reinforced concrete column.

[0007] Preferably, a plurality of anchor bars are arranged at intervals along the circumference of the square steel pipe column.

[0008] Preferably, the length of the cross steel is 1 / 3 of the length of the reinforced concrete column.

[0009] Preferably, it further comprises a plurality of stiffening ribs, wherein the stiffening ribs are fixed to the square steel pipe column and the embedded steel plate.

[0010] Preferably, a plurality of the stiffening ribs are arranged at intervals along the circumference of the square steel pipe column.

[0011] Preferably, the stiffening ribs are covered with 50 mm thick plain concrete.

[0012] Preferably, the thickness of the stiffening rib plate is the same as the wall thickness of the square steel pipe column.

[0013] Preferably, the stiffening rib is perpendicular to the embedded steel plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a rigid connection node between a square steel tube column and a reinforced concrete column, which solves the problem that when the size of the upper square steel tube column is close to the size of the lower reinforced concrete column, the traditional embedded or outsourced methods are not applicable. The utility model can achieve a rigid connection between the square steel tube column and the reinforced concrete column, effectively transmit the column bottom bending moment, axial force and shear force of the square steel tube column, have reasonable force, are easy to install, and have sufficient rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a vertical cross-sectional structure of a rigid connection node between a square steel tube column and a reinforced concrete column provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Square steel pipe column; 2. Reinforced concrete column; 3. Anchor bar; 4. Cross steel; 5. Stiffening rib; 6. Embedded steel plate. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0022] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0023] Example 1

[0024] An office building has a steel frame layer about 20 meters high on the roof. The square steel pipe column 1 of the steel frame has a size of 800mm×800mm×30mm and needs to be erected from the reinforced concrete column 2 at the bottom. The reinforced concrete column 2 is 800mm×800mm. Figure 1 As shown, at this time, the square steel tube column 1 and the reinforced concrete column 2 have the same plane size, and the traditional embedded or outsourced method is not applicable.

[0025] In order to rigidly connect the square steel tube column 1 to the reinforced concrete column 2 at its lower part, the present embodiment provides a rigid connection node between the square steel tube column and the reinforced concrete column, including a pre-buried steel plate 6, a cross-shaped steel 4, and a plurality of anchor bars 3;

[0026] like Figure 1 As shown, the embedded steel plate 6 is fixedly arranged on the top of the reinforced concrete column 2, and the plane size of the embedded steel plate 6 is larger than the reinforced concrete column 2, so that the embedded steel plate 6 will be embedded in the surrounding floor slabs, and the top of the embedded steel plate 6 is flush with the top of the surrounding floor slabs.

[0027] The anchor bar 3 may be a third-grade steel bar with a diameter of 25 mm, and the anchor bar 3 is pre-embedded in the reinforced concrete column 2, and the top of the anchor bar 3 is connected to the pre-embedded steel plate 6 by plug welding. The number and size of the anchor bar 3 can be determined by calculation.

[0028] The cross-shaped steel 4 is embedded in the reinforced concrete column 2, and the cross-shaped steel 4 is arranged centrally in the reinforced concrete column 2. The size of the cross-shaped steel 4 can be 400mm×400mm×14mm, and the length of the cross-shaped steel 4 can be 1 / 3 of the length of the reinforced concrete column 2. The top end of the cross-shaped steel 4 is connected to the embedded steel plate 6 by full penetration groove welding.

[0029] The embedded steel plate 6 may be 40 mm thick, and the embedded steel plate 6 is connected to the square steel pipe column 1 by full penetration groove welding, and the square steel pipe column 1 is aligned with the center of the embedded steel plate 6, and the embedded steel plate 6 is aligned with the center of the reinforced concrete column 2, and the square steel pipe column 1 is perpendicular to the embedded steel plate 6. The cross-shaped steel 4, the anchor bar 3, the reinforced concrete column 2, and the square steel pipe column 1 are all parallel.

[0030] Based on the above structure, through the calculation of the internal force at the bottom of the column and the node analysis, the connection node can effectively transmit the column bottom bending moment, axial force and shear force of the square steel tube column 1, and can make the square steel tube column 1 and the reinforced concrete column 2 achieve a rigid connection. The connection node has reasonable force, is easy to install, and has sufficient rigidity. This can effectively solve the problem that when the size of the upper square steel tube column is close to the size of the lower reinforced concrete column, the traditional embedded or outsourced approach is not applicable.

[0031] In this embodiment, a plurality of anchor bars 3 are arranged at intervals along the circumference of the square steel pipe column 1. For example, Figure 2 As shown, eight anchor bars 3 are pre-buried in the reinforced concrete column 2 , and the eight anchor bars 3 are arranged at intervals along the circumference of the square steel pipe column 1 .

[0032] The rigid connection node provided in this embodiment further includes a plurality of stiffening ribs 5, and the stiffening ribs 5 are welded to the square steel pipe column 1 and the embedded steel plate 6. The stiffening ribs 5 are perpendicular to the embedded steel plate 6. The thickness of the stiffening ribs 5 can be the same as the wall thickness of the square steel pipe column 1. For example, Figure 3 As shown, twelve stiffening ribs 5 are arranged at intervals along the circumference of the square steel pipe column 1. The stiffening ribs 5 can enhance the stability of the square steel pipe column 1 and the embedded steel plate 6.

[0033] The stiffening ribs 5 are covered with 50 mm thick plain concrete, which can not only improve the structural strength of the stiffening ribs 5, but also protect the stiffening ribs 5 to a certain extent.

[0034] In summary, during the construction of the rigid connection node provided in this embodiment, before pouring concrete, the reinforced concrete column 2 is first provided with the cross-shaped steel 4 within the range of 1 / 3 of the concrete column height from the top of the column, and the anchor bar 3 and the embedded steel plate 6 are pre-embedded, and the embedding depth of the anchor bar 3 is 1a, and then the concrete of the reinforced concrete column 2 is poured. After the concrete strength reaches more than 85% of the design strength, the bottom of the square steel pipe column 1 on the top of the reinforced concrete column 2 is connected to the embedded steel plate 6 by full penetration groove welding on site. Among them, the weld connection of the anchor bar 3, the cross-shaped steel 4 and the embedded steel plate 6 can be welded in advance in the factory or on site. The stiffening rib 5 is connected to the outer wall of the square steel pipe column 1 by a weld, which can be welded in advance in the factory or on site. The connection of the bottom of the square steel pipe column 1 and the connection of the stiffening rib 5 and the embedded steel plate 6 are all welded on site. After all the connections are completed, the purpose of rigidly connecting the square steel pipe column 1 to the reinforced concrete column 2 can be achieved.

[0035] Example 2

[0036] When the size of the reinforced concrete column 2 is significantly larger than that of the square steel pipe column 1, in the rigid connection node provided in this embodiment, the plane size of the embedded steel plate 6 is smaller than that of the reinforced concrete column 2. At this time, the embedded steel plate 6 can be embedded in the top of the reinforced concrete column 2 so that the embedded steel plate 6 is flush with the top of the reinforced concrete column 2. The embedded steel plate 6 does not need to be embedded in the surrounding floor slabs. The square steel pipe column 1 and the embedded steel plate 6 are connected by full penetration groove welding, so that the square steel pipe column 1 and the reinforced concrete column 2 can be rigidly connected.

[0037] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rigid connection node between a square steel tube column and a reinforced concrete column, characterized in that: It comprises a pre-buried steel plate (6), a cross-shaped steel (4), and a plurality of anchor bars (3); The cross-shaped steel (4) and the anchor bar (3) are both embedded in the reinforced concrete column (2); the embedded steel plate (6) is fixedly arranged on the top of the reinforced concrete column (2); the cross-shaped steel (4) and the anchor bar (3) are both located below the embedded steel plate (6); the top of the cross-shaped steel (4) and the top of the anchor bar (3) are both fixed to the embedded steel plate (6); and the embedded steel plate (6) is fixed to the square steel pipe column (1).

2. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 1, characterized in that: The projections of the cross-shaped steel (4) and the embedded steel plate (6) on the top of the reinforced concrete column (2) are both located at the center of the top of the reinforced concrete column (2).

3. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 1, characterized in that: The plurality of anchor bars (3) are arranged at intervals along the circumference of the square steel pipe column (1).

4. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 1, characterized in that: The length of the cross-shaped steel (4) is 1 / 3 of the length of the reinforced concrete column (2).

5. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 1, characterized in that: It also includes a plurality of stiffening ribs (5), wherein the stiffening ribs (5) are fixed to the square steel pipe column (1) and the embedded steel plate (6).

6. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 5, characterized in that: The plurality of stiffening ribs (5) are arranged at intervals along the circumference of the square steel pipe column (1).

7. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 5, characterized in that: The stiffening ribs (5) are covered with 50 mm thick plain concrete.

8. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 5, characterized in that: The plate thickness of the stiffening rib (5) is the same as the wall thickness of the square steel pipe column (1).

9. The rigid connection node between a square steel tube column and a reinforced concrete column according to claim 5, characterized in that: The stiffening rib (5) is perpendicular to the embedded steel plate (6).

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