Rotary swinging column foot structure

Abstract

The utility model discloses a rotary swing column foot structure which comprises a steel column foot, an elastic body and an inverted-T-shaped steel shell, the steel column foot is embedded in the elastic body, the elastic body comprising the steel column foot is embedded in the inverted-T-shaped steel shell, and the elastic body is tightly attached to the contact face of the inverted-T-shaped steel shell and the contact face of the steel column foot. The steel column base comprises a short steel column, a bottom steel plate and stiffening ribs, and the short steel column is vertically welded to the bottom steel plate. The steel column base has a swinging mechanism and a rotating mechanism to a certain degree, the column base can be prefabricated in advance, only a whole formed by the manufactured inverted-T-shaped steel shell, the manufactured elastic body and the manufactured steel column base needs to be placed in a foundation reinforcement cage, then cast-in-place is conducted, the complexity of the site construction procedure of an existing swinging column base is greatly simplified, and the construction efficiency is improved. And the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of structural engineering, in particular to a rotating and swinging column foot structure. Background Art

[0002] With the continuous development of the concept of recoverable functional design in the field of earthquake-resistant structures, the recoverability of earthquake-resistant structures has gradually become a hot topic of research. After an earthquake, the repair and maintenance of traditional earthquake-resistant structures is not only challenging, but also often requires a lot of manpower, material and financial resources. Even so, the function and safety of the repaired buildings are difficult to be fully guaranteed.

[0003] Traditional frame columns may suffer bending or shear failure in earthquakes, especially the column foot nodes. Due to their high connection stiffness, although they are conducive to the formation of plastic hinges, they are also prone to cause large residual deformations at the column foot, which not only affects the bearing capacity of the structure, but also poses a threat to safety. Relatively speaking, the design of the swing column foot effectively reduces the risk of damage under earthquake action by reducing the constraints between the column foot and the foundation. This design uses the deadweight of the structure or components that provide elastic restoring force to achieve automatic reset after the earthquake, allowing the column foot to swing during the earthquake to consume energy, thereby improving the seismic performance of the structure. However, although this type of swing column foot design performs well in seismic resistance, it will also have a certain impact on the overall stability of the structure, especially when prestressed steel strands are used to provide restoring force for the column foot, there will be a problem of prestress loss, which will affect the structure, and the construction process of setting up such a swing column is also relatively complicated and cumbersome, so this is also a factor that needs to be carefully weighed and considered in the design. Utility Model Content

[0004] The utility model provides a rotating and swinging column foot structure, which solves the above problem.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a rotating and swinging column foot structure, which is characterized by comprising a steel column foot, an elastic body and a convex-shaped steel shell, wherein the steel column foot is embedded in the elastic body, the elastic body including the steel column foot is embedded in the convex-shaped steel shell, and the contact surface of the elastic body, the convex-shaped steel shell and the steel column foot are all tightly fitted;

[0007] The steel column foot comprises a short steel column, a bottom steel plate and stiffening ribs, and the short steel column is vertically welded to the bottom steel plate;

[0008] The bottom steel plate is located in the lower enlarged portion of the convex-shaped steel shell, and the length and width of the bottom steel plate are greater than the length and width of the top opening of the convex-shaped steel shell.

[0009] The utility model provides a rotating and swinging column foot structure. Further, the outer peripheral side of the root of the short steel column is provided with a stiffening rib, and the stiffening rib is perpendicular to the outer peripheral side of the short steel column and the upper surface of the bottom steel plate.

[0010] The utility model provides a rotating and swinging column foot structure. Further, the outer wall of the convex steel shell and the bottom of the shell are both provided with bolts.

[0011] The utility model provides a rotating and swinging column foot structure. Further, a reinforcing rib is arranged at the shoulder of the convex-shaped steel shell.

[0012] The utility model provides a rotating and swinging column foot structure. Further, the convex-shaped steel shell is formed by welding steel plates, and the "convex shape" in the plane of the convex-shaped steel shell is concave from the midpoints of the left and right sides of the "rectangle" toward the center point of the "rectangle".

[0013] The utility model provides a rotating and swinging column foot structure. Further, the left and right sides and the front and rear sides of the short steel column foot are all provided with stiffening ribs, and the left and right shoulders and the front and rear shoulders of the convex steel shell are all provided with stiffening ribs.

[0014] The utility model discloses a rotating and swinging column foot structure. Furthermore, when the rotating and swinging column adopts a steel column, the upper end of the short steel column and the lower end of the steel column can be welded with a connecting steel plate or a flange with reserved holes. When welding the connecting steel plates, reserved holes are opened on both sides of the upper flange plate of the short steel column and the lower flange plate of the steel column. L-shaped connecting pieces with reserved holes are respectively arranged between the upper flange plate of the short steel column and the lower flange plate of the steel column and the connecting steel plate. The L-shaped connecting piece is respectively connected to the connecting steel plate, the upper flange plate of the short steel column and the lower flange plate of the steel column through high-strength bolts. When the flanges are welded between the upper end of the short steel column and the lower end of the steel column, the flanges are connected through high-strength bolts, and stiffening ribs are vertically welded between the upper end of the short steel column and the lower end of the steel column and the flanges.

[0015] The utility model discloses a rotating and swinging column foot structure. Furthermore, when the rotating and swinging column adopts a steel-concrete column, a steel extension is built in the steel-concrete column, and the extension length is one or two times the length of the cross-section of the steel-concrete column. The lower end of the steel extension section can be welded with a connecting steel plate or a flange with reserved holes. When welding the connecting steel plate, reserved holes are provided on both sides of the flange plate at the lower end of the steel extension section, and L-shaped connecting pieces with reserved holes are arranged between both sides of the flange plate at the lower end of the steel extension section and the connecting steel plate. The L-shaped connecting piece is respectively connected to the connecting steel plate, the upper end flange plate of the short steel column and the lower end flange plate of the steel extension section by high-strength bolts; when the flange is welded at the lower end of the steel extension section, the flange is welded at the upper end of the short steel column, and the flanges are connected by high-strength bolts, and stiffening ribs are vertically welded between the upper end of the short steel column and the lower end of the steel extension section and the flange.

[0016] The utility model provides a rotating and swinging column foot structure. Further, when the rotating and swinging column adopts a reinforced concrete column, the upper end of the short steel column is embedded in the reinforced concrete column, and bolts are arranged on the outer peripheral side of the embedded column section of the short steel column.

[0017] The utility model provides a rotating and swinging column foot structure, and further, the elastic body can be replaced by a high-damping rubber material.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. Compared with the traditional frame column foot, the present application can change the stress deformation mode of the traditional frame column foot, reduce the plastic deformation of the column foot, extend the service life of the component, and through the mechanical connection between the steel column foot and the frame column, the column foot can be replaced after being damaged, so that it can be quickly restored to its use function;

[0020] 2. Compared with the previous swing column foot, the present application not only has a swing mechanism, but also has a rotation mechanism to a certain extent, and the column foot can be prefabricated in advance. It only needs to place the whole formed by the manufactured convex steel shell, elastic body and steel column foot in the foundation steel cage, and then cast on site, which greatly simplifies the complexity of the on-site construction process of the previous swing column foot and improves the work efficiency;

[0021] 3. The present application provides a rotation limit and a vertical tension limit for the column base by setting the steel shell to a convex shape, thereby preventing the column base from rotating too much and exceeding the limit, thereby preventing the column base from being damaged.

[0022] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The accompanying drawing is a cross-sectional view of the rotating and rocking column foot provided by the present application;

[0024] Figure 2 The accompanying drawing is a three-dimensional schematic diagram of the rotating rocking column foot provided by the present application;

[0025] Figure 3 The accompanying drawing is a schematic diagram of the steel column foot provided in this application;

[0026] Figure 4 The accompanying drawings (a) is a schematic diagram of the flexible connection between the steel column foot and the steel column provided by the present application, and (b) is a schematic diagram of the rigid connection between the steel column foot and the steel column provided by the present application;

[0027] Figure 5 The accompanying drawings (a) are schematic diagrams of the flexible connection between the steel column foot and the steel concrete column provided by the present application, and (b) are schematic diagrams of the rigid connection between the steel column foot and the steel concrete column provided by the present application;

[0028] Figure 6 The accompanying drawing is a schematic diagram of the connection between the steel column foot and the reinforced concrete column provided by the present application;

[0029] Figure 7 The accompanying drawing is a schematic diagram of the L-shaped connector provided in this application.

[0030] Reference numerals:

[0031] 1. Steel column base; 1a. Short steel column; 1b. Bottom steel plate; 1c. Stiffening ribs; 2. Elastomer; 3. Convex steel shell; 4. Foundation; 5. Studs; 6. Steel column; 7. Reinforced concrete column; 8. Steel concrete column; 9. Connecting steel plate; 10. High-strength bolts; 11. L-shaped connector; 12. Flange. DETAILED DESCRIPTION

[0032] like Figure 1 As shown, the utility model discloses a rotating and rocking column foot structure, which is suitable for steel columns 6, reinforced concrete columns 7, and steel-concrete columns 8, and includes a steel column foot 1, an elastic body 2, a convex steel shell 3, a foundation 4, and a bolt 5.

[0033] The steel column foot 1 includes a short steel column 1a, a bottom steel plate 1b, and a stiffening rib 1c. The short steel column 1a is vertically welded to the bottom steel plate 1b. Stiffening ribs 1c are arranged on the outer peripheral side of the root of the short steel column 1a. The stiffening ribs 1c are perpendicular to the outer peripheral side of the short steel column 1a and the upper surface of the bottom steel plate 1b. The steel column foot 1 is embedded in the elastic body 2. The elastic body 2 including the steel column foot 1 is embedded in the convex steel shell 3. The convex steel shell 3 is embedded in the foundation 4, and the outer wall and the bottom of the convex steel shell 3 are provided with studs 5 to strengthen the connection with the foundation. The connection between the foundation 4, the convex-shaped steel shell 3 is provided with a stiffening rib 1c at the shoulder, the elastomer 2 is placed between the convex-shaped steel shell 3 and the steel column foot 1, the elastomer 2 and the contact surfaces of the convex-shaped steel shell 3 and the steel column foot 1 are tightly fitted, which is conducive to the self-resetting of the steel column foot 1 with the help of the elastic restoring force provided by the elastomer 2 after the steel column foot 1 rotates and swings; the bottom steel plate 1b is located in the lower expanded part of the convex-shaped steel shell 3, and the length and width of the bottom steel plate 1b are greater than the length and width of the top opening of the convex-shaped steel shell 3.

[0034] In order to further optimize the above technical scheme, the convex-shaped steel shell 3 is welded by steel plates. The "convex shape" in the plane of the convex-shaped steel shell 3 is concave from the midpoints of the left and right sides of the "rectangle" toward the center point of the "rectangle". When the rotation and swing amplitude of the rotating swing column foot is too large, the steel shell is formed into a "convex shape", and the length and width dimensions of the bottom steel plate 1b are greater than the length and width dimensions of the top opening of the convex-shaped steel shell 3. The rotation and swing amplitude of the rotating swing column is limited. The elastomer 2 is formed by placing the steel column foot 1 in the convex-shaped steel shell 3 and then pouring elastic material to form a whole, which is conducive to better joint participation in work. The material of the elastomer 2 can be polyurethane, damping rubber, etc.

[0035] In order to further optimize the above technical solution, stiffening ribs 1c are provided on the left and right sides and front and rear faces of the foot of the short steel column 1a, and stiffening ribs 1c are provided on the left and right shoulders and front and rear shoulders of the convex-shaped steel shell 3, so as to enhance the stability of the steel column foot 1 and the convex-shaped steel shell 3 to a certain extent.

[0036] In order to further optimize the above technical solution, studs 5 are arranged on the outer surface of the convex-shaped steel shell 3 parallel to the central axis of the short steel column 1a, and studs 5 are also arranged on the outer surface of the bottom of the convex-shaped steel shell 3 perpendicular to the central axis of the short steel column 1a, and welding is adopted between the studs 5 and the convex-shaped steel shell 3.

[0037] In order to further optimize the above technical solution, the convex steel shell 3, the elastomer 2, the steel column base 1, the stiffening ribs 1c, and the bolts 5 are pre-fabricated into a whole and placed in a steel cage in the foundation 4. The foundation 4 is then poured to form the rotating rocking column. By pre-fabricating the corresponding components, the on-site construction process can be simplified and work efficiency can be improved.

[0038] Among them, when the rotating rocking column adopts the steel column 6, the upper end of the short steel column 1a and the lower end of the steel column 1 can be welded with a connecting steel plate 9 or a flange 12 with reserved holes. When the upper end of the short steel column 1a and the lower end of the steel column 1 are welded with the connecting steel plate 9 with reserved holes, holes are reserved on both sides of the upper flange plate of the short steel column 1a and the lower flange plate of the steel column 1, and L-shaped connecting pieces 11 with reserved holes are respectively arranged between the upper flange plate of the short steel column 1a and the lower flange plate of the steel column 1 and the connecting steel plate 9. This connection method is a flexible connection. When the flange 12 is welded between the upper end of the short steel column 1a and the lower end of the steel column 1, the flanges 12 are connected by high-strength bolts 10, and stiffening ribs 1c are vertically welded between the upper end of the short steel column 1a and the lower end of the steel column 1 and the flange 12. This connection method is a rigid connection.

[0039] Among them, when the rotating rocking column adopts a steel-concrete column 8, a steel-concrete column 8 is built with a steel extension, and the extension length is one or two times the length of the cross-section of the steel-concrete column 8. The lower end of the steel extension section can be welded with a connecting steel plate 9 or a flange 12 with reserved holes. When the connecting steel plate 9 with reserved holes is welded at the lower end of the steel extension section, holes are reserved on both sides of the flange plate at the lower end of the steel extension section, and L-shaped connectors 11 with reserved holes are set between the two sides of the flange plate at the lower end of the steel extension section and the connecting steel plate 9, and both are connected by high-strength bolts 10. The connection method with the L-shaped connector 11 is a flexible connection. When the flange 12 is welded at the lower end of the steel extension section, the flange 12 is welded at the upper end of the short steel column 1a, and the flanges 12 are connected by high-strength bolts 10, and the stiffening rib 1c is vertically welded between the upper end of the short steel column 1a and the lower end of the steel extension section and the flange 12. The connection method through the flange connection is a rigid connection.

[0040] When the rotating rocking column adopts a reinforced concrete column 7, the upper end of the short steel column 1a in the steel column foot 1 is embedded in the reinforced concrete column 7, and bolts 5 are arranged on the outer peripheral side of the embedded column section of the short steel column 1a.

[0041] Among them, high-strength bolts 10 are used to connect the L-shaped connecting piece 11 and the connecting steel plate 9 and the two sides of the flange plate, and between the upper and lower connecting steel plates 9. This connection method is conducive to the rapid replacement of the steel column foot after damage.

[0042] Here’s how it works:

[0043] When the steel column foot is subjected to external excitations such as earthquakes, the steel column foot can use the corner points or sides of the bottom steel plate as the rotation points or rotation sides for rotation and swing, thereby realizing the rotation and swing of the steel column foot. The steel shell is recessed from the midpoints of the left and right sides of the "rectangle" to the center point of the "rectangle" to form a "convex" steel shell. In addition, the length and width of the bottom steel plate are greater than the length and width of the top opening of the convex steel shell. This design is used to limit the rotation and swing amplitude of the rotating and swinging column foot. At the same time, after the rotation and swing occurs, the steel column foot uses the elastic properties of the elastic body itself to realize the self-reset of the steel column foot, thereby changing the stress deformation mode of the traditional frame column foot, reducing the plastic deformation of the column foot, extending the service life of the component, and through the mechanical connection between the steel column foot and the frame column, the column foot can be replaced after damage, so that it can quickly restore its use function.

[0044] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A rotating and swinging column foot structure, characterized in that: It comprises a steel column foot (1), an elastic body (2) and a convex-shaped steel shell (3), wherein the steel column foot (1) is embedded in the elastic body (2), the elastic body (2) including the steel column foot (1) is embedded in the convex-shaped steel shell (3), and the contact surfaces of the elastic body (2), the convex-shaped steel shell (3) and the steel column foot (1) are tightly fitted; The steel column foot (1) comprises a short steel column (1a), a bottom steel plate (1b) and a stiffening rib (1c); the short steel column (1a) is vertically welded to the bottom steel plate (1b); the bottom steel plate (1b) is located in the lower expanded portion of the convex-shaped steel shell (3), and the length and width of the bottom steel plate (1b) are greater than the length and width of the top opening of the convex-shaped steel shell (3).

2. The rotating and swinging column foot structure according to claim 1, characterized in that: The outer peripheral side of the root of the short steel column (1a) is provided with a stiffening rib (1c), and the stiffening rib (1c) is perpendicular to the outer peripheral side of the short steel column (1a) and the upper surface of the bottom steel plate (1b).

3. The rotating and swinging column foot structure according to claim 1, characterized in that: The outer wall and the bottom of the convex steel shell (3) are both provided with bolts (5).

4. The rotating and swinging column foot structure according to claim 2, characterized in that: The shoulder of the convex steel shell (3) is provided with a stiffening rib (1c).

5. The rotating and swinging column foot structure according to claim 1, characterized in that: The convex-shaped steel shell (3) is formed by welding steel plates, and the "convex-shaped" in the plane of the convex-shaped steel shell (3) is formed by the midpoints of the left and right sides of the "rectangle" being concave toward the center point of the "rectangle".

6. The rotating and rocking column foot structure according to claim 4, characterized in that: The left and right sides and the front and rear sides of the column foot of the short steel column (1a) are provided with stiffening ribs (1c), and the left and right shoulders and the front and rear shoulders of the convex steel shell (3) are provided with stiffening ribs (1c).

7. The rotating and rocking column foot structure according to claim 1, characterized in that: When the rotating rocking column adopts a steel column (6), the upper end of the short steel column (1a) and the lower end of the steel column (6) can be welded with a connecting steel plate (9) or a flange (12) with reserved holes. When welding the connecting steel plate (9), reserved holes are provided on both sides of the upper flange plate of the short steel column (1a) and on both sides of the lower flange plate of the steel column (6). L flanges with reserved holes are provided between the upper flange plate of the short steel column (1a) and the lower flange plate of the steel column (6) and the connecting steel plate (9). The L-shaped connecting piece (11) is connected to the connecting steel plate (9), the upper flange plate of the short steel column (1a) and the lower flange plate of the steel column (6) respectively by high-strength bolts (10); when the flange (12) is welded to the upper end of the short steel column (1a) and the lower end of the steel column (6), the flanges (12) are connected by high-strength bolts (10), and stiffening ribs (1c) are vertically welded between the upper end of the short steel column (1a), the lower end of the steel column (6) and the flange (12).

8. The rotating and swinging column foot structure according to claim 1, characterized in that: When the rotating rocking column adopts a steel-concrete column (8), a steel extension is built into the steel-concrete column (8), and the extension length is one or two times the cross-sectional length of the steel-concrete column (8). The lower end of the steel extension section in the steel-concrete column (8) can be welded with a connecting steel plate (9) or a flange (12) with a reserved hole. When the connecting steel plate (9) is welded, reserved holes are provided on both sides of the flange plate at the lower end of the steel extension section in the steel-concrete column (8), and a flange with a reserved hole is provided between both sides of the flange plate at the lower end of the steel extension section in the steel-concrete column (8) and the connecting steel plate (9). The L-shaped connecting piece (11) is connected to the connecting steel plate (9), the upper flange plate of the short steel column (1a) and the lower flange plate of the steel extension section in the steel concrete column (8) respectively by high-strength bolts; when the flange (12) is welded to the lower end of the steel extension section in the steel concrete column (8), the upper end of the short steel column (1a) is welded to the flange (12), the flanges (12) are connected by high-strength bolts (10), and a stiffening rib (1c) is vertically welded between the upper end of the short steel column (1a) and the lower end of the steel extension section in the steel concrete column (8) and the flange (12).

9. The rotating and swinging column foot structure according to claim 1, characterized in that: When the rotating rocking column adopts a reinforced concrete column (7), the upper end of the short steel column (1a) is embedded in the reinforced concrete column (7), and bolts (5) are arranged on the outer peripheral side of the embedded column section of the short steel column (1a).

10. The rotating and swinging column foot structure according to claim 1, characterized in that: The elastic body (2) can be made of polyurethane material or high-damping rubber material.

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