Steel column spherical joint connected with space truss

Abstract

This utility model relates to a steel column spherical joint for connection with a space truss, comprising a concrete foundation, a circular tube column, and a hemispherical hollow steel cap. The bottom of the circular tube column is vertically cast inside the concrete foundation, and the inside of the circular tube column is filled with solidified grout. The hemispherical hollow steel cap is positioned above the circular tube column by a positioning frame. The bottom of the positioning frame extends into the circular tube column and is supported by the grout. The top of the positioning frame has an end face that matches the inner surface of the hemispherical hollow steel cap. The hemispherical hollow steel cap is fitted onto the outer side of the top of the positioning frame and welded to the circular tube column. When manufacturing the steel column spherical joint of this utility model, after the circular tube column is fixed by pouring concrete foundation, grout is poured into the circular tube column. After the grout solidifies, the positioning frame is installed, and finally the hemispherical hollow steel cap is installed and welded. The manufacturing process is convenient, and the positioning frame is used for positioning and installation of the hemispherical hollow steel cap, which facilitates precision control.

Description

Technical Field

[0001] This utility model relates to the field of steel structure connection node technology, and in particular to a steel column ball node for connection with a space truss. Background Technology

[0002] Because large-span public buildings have high requirements for interior space, they are usually designed with a column-free or column-reduced scheme. As a result, there are often a large number of tubular trusses and complex node connections at the column top supports. Generally, for nodes with too many members, cast steel nodes are used in the design to meet the connection and stress requirements. However, due to the heavy weight and high cost of cast steel nodes, as well as the possibility of recasting due to processing defects, the project cost and construction period are affected to some extent.

[0003] Chinese utility model patent CN222477728U discloses a multi-tube connected steel structure support. The steel structure support includes a steel pipe concrete column. A head steel plate is welded to the top of the steel pipe concrete column. A finished support is welded to the top of the head steel plate. A support steel plate is welded to the top of the finished support. A short steel column is welded to the top of the support steel plate. Four tubular truss lower chords are connected around the short steel column. A node connection plate is welded to the top of the short steel column. A hollow hemisphere is welded to the top of the node connection plate. The diagonal web members of the main truss are connected around the hollow hemisphere.

[0004] While the aforementioned steel structure fabrication solved the problems of complex multi-tube connection nodes, numerous intersecting welds, and hidden welds in tubular truss structures, the steel-concrete composite column top structure has many components, making assembly operations complex and precision difficult to control.

[0005] Therefore, this utility model proposes a steel column ball joint that connects to a space truss to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a steel column ball joint that can be connected to a space truss, which has a simple manufacturing process and is easy to control with precision.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a steel column ball joint connected to a space truss, the innovation of which is: including a concrete foundation, a circular tube column and a hemispherical hollow steel cap; The bottom of the circular tube column is vertically cast inside the concrete foundation. The inside of the circular tube column is filled with solidified grout. A hemispherical hollow steel cap is set above the circular tube column by a positioning frame. The bottom of the positioning frame extends into the inside of the circular tube column and is supported by the grout. The top of the positioning frame has an end face that matches the inner surface of the hemispherical hollow steel cap. The hemispherical hollow steel cap is fitted on the outer side of the top of the positioning frame and welded to the circular tube column.

[0008] Furthermore, the positioning frame includes a base plate, a middle plate, and a cross-shaped vertical plate. The base plate and the middle plate are respectively connected to the bottom and middle of the cross-shaped vertical plate. The base plate is flat against the top surface of the grouting material, and the middle plate is set inside the circular pipe column, with the top surface of the middle plate flush with the top end face of the circular pipe column.

[0009] Furthermore, the circular tube column is cast inside the concrete foundation and has several studs attached to its bottom outer wall, with the studs cast inside the concrete foundation.

[0010] Furthermore, a horizontal plate is fitted onto the outer side of the circular tube column. The horizontal plate is positioned above the stud and is cast inside the concrete foundation.

[0011] Furthermore, an auxiliary positioning rod is provided on the outer side of the horizontal plate. One side of the auxiliary positioning rod is connected to the top surface of the horizontal plate, and the other side extends to the outer side of the horizontal plate. The auxiliary positioning rod is cast inside the concrete foundation.

[0012] Furthermore, a post-cast concrete pile is provided above the concrete foundation. The post-cast concrete pile is cast on the outside of the circular pipe column, and the top surface of the post-cast concrete pile is flush with the top surface of the grouting material.

[0013] The advantages of this utility model are: When manufacturing the steel column ball joint of this utility model, it is only necessary to fix the round pipe column after pouring concrete foundation, grouting inside the round pipe column, installing the positioning frame after the grout solidifies, and finally installing and welding the hemispherical hollow steel cap. It is easy to manufacture, and the positioning frame is used for positioning and installation of the hemispherical hollow steel cap, which facilitates precision control.

[0014] The positioning frame of this utility model has a base plate and a middle plate connected by a cross-shaped vertical plate to form a whole. The base plate and the middle plate extend into the inside of the cylindrical column. By observing the flushness of the top surface of the middle plate with the top end face of the cylindrical column, it can be determined whether the installation position and verticality of the positioning frame meet the requirements, thus providing a guarantee for the high-precision control installation of the hemispherical hollow steel cap.

[0015] The circular tube column of this invention is cast inside the concrete foundation and connected to several studs on the bottom outer wall. This effectively resists the horizontal shear force between the steel column and the concrete foundation interface, prevents relative slippage between the two, and improves the overall rigidity and stability of the steel column ball joint.

[0016] This invention improves shear bearing capacity by setting a horizontal plate above the studs and utilizing the friction between the horizontal plate and the concrete. At the same time, the adhesion between the horizontal plate surface and the concrete, as well as the plate's rigidity, provide additional pull-out resistance, reducing the risk of the circular tube column detaching from the concrete foundation.

[0017] This invention uses an auxiliary positioning rod on a horizontal plate as a rigid reference to accurately calibrate the spatial coordinates of the horizontal plate and the circular column before the concrete foundation is poured, thus preventing tilting or displacement caused by the impact of concrete flow.

[0018] This invention utilizes post-cast concrete piles to wrap around the circular pipe column, blocking the path of groundwater corrosion. At the same time, the top surface of the post-cast concrete piles is flush with the grouting material inside the circular pipe column, forming a rigid transition layer to prevent local buckling of the circular pipe column. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a structural schematic diagram of the steel column ball joint connected to the space truss of this utility model. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] Example This embodiment provides a steel column ball joint for connection with a space truss, such as Figure 1 As shown, it includes a concrete foundation 1, a circular tube column 4, and a hemispherical hollow steel cap 6; The bottom of the circular tube column 4 is vertically cast inside the concrete foundation 1. The inside of the circular tube column 4 is filled with solidified grout 7. The hemispherical hollow steel cap 6 is set above the circular tube column 4 by a positioning frame 5. The bottom of the positioning frame 5 extends into the inside of the circular tube column 4 and is supported by the grout 7. The top of the positioning frame 5 has an end face that matches the inner surface of the hemispherical hollow steel cap 6. The hemispherical hollow steel cap 6 is fitted on the outer side of the top of the positioning frame 5 and welded to the circular tube column 4.

[0023] In this embodiment, the positioning frame 5 includes a base plate 502, a middle plate 503, and a cross-shaped vertical plate 501. The bottom outer wall of the cross-shaped vertical plate 501 is attached to the inner wall of the circular pipe column 4, and the top end face of the cross-shaped vertical plate 501 is attached to the inner surface of the hemispherical hollow steel cap 6. The base plate 502 and the middle plate 503 are respectively connected to the bottom and middle of the cross-shaped vertical plate 501. The outer circular surfaces of the base plate 502 and the middle plate 503 match the inner circular surface of the circular pipe column 4. The base plate 502 is flat against the top surface of the grouting material 7. The middle plate 503 is set inside the circular pipe column 4, and the top surface of the middle plate 503 is flush with the top end face of the circular pipe column 4. The outer edge of the middle plate 503 is welded to the top surface of the circular pipe column 4. The base plate 502 and the middle plate 503 of the positioning frame 5 are connected by a cross-shaped vertical plate 501 to form a whole. The base plate 502 and the middle plate 503 extend into the interior of the circular tube column 4. By observing the flushness of the top surface of the middle plate 503 with the top end face of the circular tube column 4, it is determined whether the installation position and verticality of the positioning frame 5 meet the requirements, thus providing a guarantee for the high-precision control installation of the hemispherical hollow steel cap 6.

[0024] In this embodiment, the bottom outer wall of the circular tube column 4 is cast inside the concrete foundation 1 and connected with several studs 2. The studs 2 are cast inside the concrete foundation 1, which effectively resist the horizontal shear force between the steel column and the concrete foundation 1 interface, prevent the two from slipping relative to each other, and improve the overall stiffness and stability of the steel column ball joint.

[0025] In this embodiment, a horizontal plate 9 is fitted onto the outer side of the circular tube column 4. The horizontal plate 9 is positioned above the stud 2, welded to the circular tube column 4, and cast inside the concrete foundation 1. The friction between the horizontal plate 9 and the concrete further enhances the shear bearing capacity. At the same time, the adhesion between the surface of the horizontal plate 9 and the concrete, as well as the rigidity of the plate, provide additional pull-out resistance, reducing the risk of the circular tube column 4 detaching from the concrete foundation 1.

[0026] In this embodiment, two auxiliary positioning rods 8 are provided on the outer side of the horizontal plate 9. The two auxiliary positioning rods 8 are symmetrically arranged about the central axis of the circular tube column 4. One side of the auxiliary positioning rod 8 is connected to the top surface of the horizontal plate 9, and the other side extends to the outer side of the horizontal plate 9. The auxiliary positioning rods 8 are cast inside the concrete foundation 1. Using the auxiliary positioning rods 8 as rigid references, the spatial coordinates of the horizontal plate 9 and the circular tube column 4 are accurately calibrated before the concrete foundation 1 is poured, preventing tilting or displacement caused by the impact of concrete flow.

[0027] In this embodiment, in order to block the path of groundwater corrosion, a post-cast concrete pile 3 is provided above the concrete foundation 1. The post-cast concrete pile 3 is cast on the outside of the circular pipe column 4. The top surface of the post-cast concrete pile 3 is flush with the top surface of the grouting material 7 to form a rigid transition layer and avoid local buckling of the circular pipe column 4.

[0028] Before fabricating the steel column ball joint of this utility model, the positioning frame 5 is prefabricated, and the horizontal plate 9, studs 2, and auxiliary positioning rods 8 are welded into place on the circular tube column 4. During fabrication, the concrete foundation 1 is poured to fix the circular tube column 4, and then grout is injected into the circular tube column 4. After the grout solidifies, the post-cast concrete pile 3 is poured, the positioning frame 5 is placed, and the middle plate 503 is welded to fix the positioning frame 5. Finally, the hemispherical hollow steel cap 6 is installed and welded. The fabrication is convenient, and the hemispherical hollow steel cap 6 is positioned and installed using the positioning frame 5, which facilitates precision control.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A steel column ball joint for connection with a space truss, characterized in that: Includes concrete foundation, circular tubular columns, and hemispherical hollow steel cap; The bottom of the circular tube column is vertically cast inside the concrete foundation. The inside of the circular tube column is filled with solidified grout. A hemispherical hollow steel cap is set above the circular tube column by a positioning frame. The bottom of the positioning frame extends into the inside of the circular tube column and is supported by the grout. The top of the positioning frame has an end face that matches the inner surface of the hemispherical hollow steel cap. The hemispherical hollow steel cap is fitted on the outer side of the top of the positioning frame and welded to the circular tube column.

2. The steel column ball joint connected to the space truss according to claim 1, characterized in that: The positioning frame includes a base plate, a middle plate, and a cross-shaped vertical plate. The base plate and the middle plate are respectively connected to the bottom and middle of the cross-shaped vertical plate. The base plate is flat against the top surface of the grouting material, and the middle plate is set inside the circular pipe column, with the top surface of the middle plate flush with the top end face of the circular pipe column.

3. The steel column ball joint connected to the space truss according to claim 1, characterized in that: The circular tube column is cast inside the concrete foundation and has several studs attached to its bottom outer wall. The studs are cast inside the concrete foundation.

4. The steel column ball joint connected to the space truss according to claim 3, characterized in that: A horizontal plate is fitted on the outside of the circular tube column. The horizontal plate is positioned above the studs and is cast inside the concrete foundation.

5. The steel column ball joint connected to the space truss according to claim 4, characterized in that: An auxiliary positioning rod is provided on the outer side of the horizontal plate. One side of the auxiliary positioning rod is connected to the top surface of the horizontal plate, and the other side extends to the outer side of the horizontal plate. The auxiliary positioning rod is cast inside the concrete foundation.

6. The steel column ball joint connected to the space truss according to claim 1, characterized in that: A post-cast concrete pile is provided above the concrete foundation. The post-cast concrete pile is cast on the outside of the circular pipe column, and the top surface of the post-cast concrete pile is flush with the top surface of the grouting material.

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