Round tube rotating box type column joint

Abstract

The utility model discloses a circular tube rotating box type column joint, and relates to the technical field of building structures, and the circular tube rotating box type column joint comprises a lower column circular steel tube, an upper column square steel tube, a transverse partition plate and an arc-shaped force transmission plate; the transverse partition plate is arranged between the lower column circular steel pipe and the upper column square steel pipe, the transverse partition plate is fixedly connected with the lower column circular steel pipe, and the transverse partition plate is fixedly connected with the upper column square steel pipe; the arc-shaped force transmission plate is arranged on the side, facing the upper column square steel pipe, of the transverse partition plate, the radian of the arc-shaped force transmission plate is consistent with that of the lower column round steel pipe, the arc-shaped force transmission plate wraps the outer side of the upper column square steel pipe, the arc-shaped force transmission plate is fixedly connected with the upper column square steel pipe, and the arc-shaped force transmission plate is fixedly connected with the transverse partition plate. According to the circular pipe rotating box type column joint, the manufacturing process is simplified, the force transmission path is defined, flexible conversion of the structure is achieved, and the problems that in the prior art, construction difficulty is large, structural stability is poor, and practical application is limited are effectively solved.

Description

Technical Field

[0001] This application relates to the field of building structure technology, and in particular to a circular tube to box-type column joint. Background Technology

[0002] In the field of building structures, especially in the design and construction of super high-rise buildings, the use of composite structural components is increasing. Concrete-filled steel tubular columns are widely used as vertical load-bearing components in frame-core tube structural systems due to their excellent load-bearing performance, small component size, and controllable economic costs.

[0003] Although concrete-filled steel tubular (CFST) columns offer significant advantages in structural applications, existing joint designs often have shortcomings when converting them into box-type CFST columns in actual engineering projects. These shortcomings primarily manifest in the complexity of the fabrication process, leading to increased construction difficulty; unclear force transmission paths at the conversion location, affecting structural stability and safety; and difficulty in practical application, limiting their widespread adoption in engineering projects. These problems not only increase construction costs but also pose challenges to the long-term performance and maintenance of buildings. Therefore, existing CFST-to-box-type column joint technologies urgently need improvement to meet the higher requirements of modern building structures for flexibility, economy, and safety. Utility Model Content

[0004] The purpose of this application is to provide a circular tube to box-type column joint, which simplifies the manufacturing process, clarifies the force transmission path, and enables flexible structural conversion, effectively solving the problems of high construction difficulty, poor structural stability, and limited practical application in the prior art.

[0005] To achieve the above objectives, this application provides a circular tube to box-type column joint, comprising:

[0006] Both the lower column round steel pipe and the upper column square steel pipe are vertically installed, with the upper column square steel pipe located at the upper end of the lower column round steel pipe;

[0007] A transverse partition is provided between the lower column round steel pipe and the upper column square steel pipe. The transverse partition is fixedly connected to the lower column round steel pipe and the transverse partition is fixedly connected to the upper column square steel pipe.

[0008] An arc-shaped force transmission plate is disposed on the side of the transverse partition facing the upper column square steel pipe. The arc of the arc-shaped force transmission plate is consistent with the arc of the lower column round steel pipe. The arc-shaped force transmission plate covers the outer side of the upper column square steel pipe. The arc-shaped force transmission plate is fixedly connected to the upper column square steel pipe and the arc-shaped force transmission plate is fixedly connected to the transverse partition.

[0009] When pouring concrete into the circular tube-to-box column joint, concrete is poured inside the lower column circular steel tube, inside the upper column square steel tube, and between the arc-shaped force transmission plate and the upper column square steel tube.

[0010] In some embodiments, the circular tube to box-shaped column node further includes an inner stiffening plate, which is disposed inside the lower column circular steel tube, and the extending direction of the inner stiffening plate is perpendicular to the extending direction of the lower column circular steel tube.

[0011] The inner stiffening plate is provided with grouting holes.

[0012] In some embodiments, the circular tube to box-shaped column node further includes an inner stiffening plate, which is disposed inside the upper column square steel tube, and the extending direction of the inner stiffening plate is perpendicular to the extending direction of the upper column square steel tube.

[0013] The inner stiffening plate is provided with grouting holes.

[0014] In some embodiments, the circular tube to box-shaped column node further includes a closed stiffening plate, which is located at one end of the arc-shaped force transmission plate opposite to the transverse partition. The closed stiffening plate is fixedly connected to the arc-shaped force transmission plate and fixedly connected to the upper column square steel pipe.

[0015] In some embodiments, the circular tube to box-shaped column node further includes a triangular stiffening plate, which is disposed inside the lower column circular steel tube, and is fixedly connected to the lower column circular steel tube and the transverse partition.

[0016] In some embodiments, the transverse partition protrudes beyond the lower round steel pipe and the upper square steel pipe in a direction perpendicular to the extending direction of the lower round steel pipe and the upper square steel pipe, and the outer contour of the transverse partition encloses the projection pattern of the lower round steel pipe and the upper square steel pipe on the transverse partition.

[0017] In some embodiments, the number of the arc-shaped force transmission plates is four;

[0018] The arc-shaped force transmission plate is provided on all four planes of the upper column square steel pipe.

[0019] In some embodiments, the transverse partition is provided with grouting holes.

[0020] In some embodiments, the arc-shaped force transmission plate is provided with an overflow hole.

[0021] Compared to the aforementioned background technology, the circular tube to box-type column joint provided in this application mainly includes a lower circular steel pipe, an upper square steel pipe, a transverse partition, and an arc-shaped force transmission plate. Both the lower circular steel pipe and the upper square steel pipe are vertically arranged, with the upper square steel pipe located at the upper end of the lower circular steel pipe. The transverse partition is located between the lower circular steel pipe and the upper square steel pipe, and is fixedly connected to both the lower circular steel pipe and the upper square steel pipe. The arc-shaped force transmission plate is located on the side of the transverse partition facing the upper square steel pipe, and the arc of the arc-shaped force transmission plate is consistent with the arc of the lower circular steel pipe. The arc-shaped force transmission plate covers the outer side of the upper square steel pipe and is fixedly connected to both the upper square steel pipe and the transverse partition. When pouring concrete into the circular tube to box-type column joint, concrete is poured inside the lower circular steel pipe, inside the upper square steel pipe, and between the arc-shaped force transmission plate and the upper square steel pipe.

[0022] In response to the problems of high construction difficulty, poor structural stability and limited practical application of existing circular tube to box-type column joints mentioned in the background technology, this technical solution achieves effective improvement through the following design.

[0023] This technical solution reduces construction difficulty through a simplified structural design. The vertical arrangement of the lower column's round steel pipe and the upper column's square steel pipe, along with the fixed connection of the horizontal partitions, reduces complex welding and installation steps, making the construction process simpler and faster. This design not only reduces the complexity of construction but also lowers the requirements for construction technology, thus making construction easier to implement.

[0024] The design of the arc-shaped force transmission plate clearly defines the force transmission path, improving the stability and safety of the structure. The curvature of the arc-shaped force transmission plate matches the circular steel pipe of the lower column and is fixedly connected to the square steel pipe of the upper column and the transverse partition. This continuous structural design ensures that the force transmission is more direct and effective, reduces the uncertainty of the structure under stress, and thus improves the stability of the entire structure.

[0025] By pouring concrete between the lower circular steel pipe, the upper square steel pipe, and the curved load-bearing plate and the upper square steel pipe, flexible structural transformation is achieved. This design not only adapts to changes in building function but also improves material utilization and reduces costs. The concrete pouring enhances the integrity and load-bearing capacity of the joints. Furthermore, the continuity and consistency of the structure allow for flexible transformation under different building requirements, meeting the higher demands of modern building structures for flexibility, economy, and safety.

[0026] Based on the above structural and process descriptions, it can be seen that the circular tube to box-type column joint has at least the following beneficial effects: by simplifying the manufacturing process, clarifying the force transmission path, and realizing flexible structural conversion, the circular tube to box-type column joint effectively solves the problems of high construction difficulty, poor structural stability, and limited practical application in the existing technology. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 An axonometric view of a circular tube to box-shaped column node provided in an embodiment of this application;

[0029] Figure 2 This is a front view of a circular tube to box-shaped column node provided in an embodiment of this application;

[0030] Figure 3 for Figure 2 A schematic diagram of AA.

[0031] in:

[0032] 1. Lower column round steel pipe, 2. Upper column square steel pipe, 3. Horizontal partition, 4. Inner partition stiffening plate, 5. Arc-shaped force transmission plate, 6. Closed stiffening plate, 7. Triangular stiffening plate. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Please refer to Figures 1 to 3 ,in, Figure 1 This is an axonometric view of the circular tube to box-shaped column node provided in an embodiment of this application. Figure 2 This is a front view of the circular tube to box-shaped column node provided in an embodiment of this application. Figure 3 for Figure 2 A schematic diagram of AA.

[0036] In a first specific embodiment, the circular tube to box-type column node provided in this application mainly includes a lower column circular steel pipe 1, an upper column square steel pipe 2, a transverse partition 3, and an arc-shaped force transmission plate 5.

[0037] Both the lower column round steel pipe 1 and the upper column square steel pipe 2 are set vertically. The upper column square steel pipe 2 is located at the upper end of the lower column round steel pipe 1. It can be understood that the lower column round steel pipe 1 extends from bottom to top, and the upper column square steel pipe 2 continues to extend from bottom to top in the extension direction of the lower column round steel pipe 1.

[0038] The transverse partition 3 is located between the lower column round steel pipe 1 and the upper column square steel pipe 2. The transverse partition 3 is fixedly connected to the lower column round steel pipe 1 and the upper column square steel pipe 2. This means that the lower column round steel pipe 1 and the upper column square steel pipe 2 are not directly connected, but are connected through the transverse partition 3. The transverse partition 3 serves to connect the lower column round steel pipe 1 and the upper column square steel pipe 2.

[0039] The arc-shaped force transmission plate 5 is located on the side of the transverse partition 3 facing the upper column square steel pipe 2. The arc of the arc-shaped force transmission plate 5 is consistent with the arc of the lower column round steel pipe 1. The arc-shaped force transmission plate 5 covers the outer side of the upper column square steel pipe 2. The arc-shaped force transmission plate 5 is fixedly connected to the upper column square steel pipe 2 and the arc-shaped force transmission plate 5 is fixedly connected to the transverse partition 3. This means that the structure formed by the arc-shaped force transmission plate 5 and the upper column square steel pipe 2 maintains the same arc as the lower column round steel pipe 1.

[0040] When pouring concrete into the circular tube to box-shaped column joint, concrete needs to be poured inside the lower column circular steel pipe 1 and the upper column square steel pipe 2. At the same time, concrete also needs to be poured between the arc-shaped force transmission plate 5 and the upper column square steel pipe 2 to maintain good force transmission performance of the upper and lower parts of the structure.

[0041] In response to the problems of high construction difficulty, poor structural stability and limited practical application of existing circular tube to box-type column joints mentioned in the background technology, this technical solution achieves effective improvement through the following design.

[0042] This technical solution reduces construction difficulty through a simplified structural design. The vertical arrangement of the lower column round steel pipe 1 and the upper column square steel pipe 2, along with the fixed connection of the transverse partition 3, reduces complex welding and installation steps, making the construction process simpler and faster. This design not only reduces the complexity of construction but also lowers the requirements for construction technology, thus making construction easier to implement.

[0043] The design of the arc-shaped force transmission plate 5 clarifies the force transmission path and improves the stability and safety of the structure. The curvature of the arc-shaped force transmission plate 5 is consistent with that of the lower column round steel pipe 1, and it is fixedly connected to the upper column square steel pipe 2 and the transverse partition 3. This continuous structural design ensures that the force transmission is more direct and effective, reduces the uncertainty of the structure under stress, and thus improves the stability of the entire structure.

[0044] By pouring concrete between the lower circular steel pipe 1, the upper square steel pipe 2, and the arc-shaped force-transfer plate 5 and the upper square steel pipe 2, flexible structural transformation is achieved. This design not only adapts to changes in building function but also improves material utilization and reduces costs. The concrete pouring enhances the integrity and load-bearing capacity of the joint. Furthermore, the continuity and consistency of the structure allow for flexible transformation under different building requirements, meeting the higher demands of modern building structures for flexibility, economy, and safety.

[0045] Based on the above structural and process descriptions, it can be seen that the circular tube to box-type column joint has at least the following beneficial effects: by simplifying the manufacturing process, clarifying the force transmission path, and realizing flexible structural conversion, the circular tube to box-type column joint effectively solves the problems of high construction difficulty, poor structural stability, and limited practical application in the existing technology.

[0046] In some embodiments, the circular tube to box-type column node further includes an inner stiffening plate 4, which is disposed inside the lower column circular steel tube 1, and the extension direction of the inner stiffening plate 4 is perpendicular to the extension direction of the lower column circular steel tube 1; the inner stiffening plate 4 is provided with grouting holes.

[0047] In this embodiment, the design of the circular tube to box-type column node further includes an inner stiffening plate 4. The addition of this component is intended to enhance the stability and strength of the structure. The inner stiffening plate 4 is disposed inside the lower column circular steel tube 1, and its extension direction is perpendicular to the extension direction of the lower column circular steel tube 1. This layout helps to provide additional support in directions perpendicular to the axis of the circular tube, including the left-right and front-back directions, thereby increasing the rigidity and load-bearing capacity of the entire node.

[0048] The inner stiffening plate 4 is equipped with grouting holes. This design allows grouting material to be injected into the entire space of the lower column circular steel pipe 1 through the inner stiffening plate 4 during construction. The function of the grouting holes is to ensure that the grouting material can be evenly distributed and fill all gaps. At this time, the inner stiffening plate 4 is tightly bonded to the concrete in the lower column circular steel pipe 1 in an embedded form. This bonding not only improves the overall stability of the structure, but also helps to disperse and transfer the load, reduce local stress concentration, and avoid structural damage or failure caused by stress concentration.

[0049] In some embodiments, the round tube to box type column node further includes an inner stiffening plate 4, which is disposed inside the upper column square steel tube 2, and the extension direction of the inner stiffening plate 4 is perpendicular to the extension direction of the upper column square steel tube 2; the inner stiffening plate 4 is provided with grouting holes.

[0050] In this embodiment, the design of the circular tube to box-type column node has been further optimized. By adding an inner stiffening plate 4 inside the upper square steel tube 2, the structural strength and stability of the node are enhanced. The inner stiffening plate 4 is set perpendicular to the extension direction of the upper square steel tube 2. This layout helps to provide additional support force in directions perpendicular to the axis of the square tube, including the left-right and front-back directions, thereby increasing the rigidity and load-bearing capacity of the entire upper square steel tube 2.

[0051] The inner stiffening plate 4 is specially designed with grouting holes. This detail allows grouting material to be injected into the internal space of the upper column square steel pipe 2 through these holes during construction. The placement of the grouting holes ensures that the grouting material can be evenly distributed and fill all the voids inside the upper column square steel pipe 2, allowing the inner stiffening plate 4 to be tightly bonded to the concrete inside the upper column square steel pipe 2 in an embedded manner. This bonding method not only improves the overall stability of the structure but also helps to more effectively distribute and transfer the load, reducing local stress concentration and thus avoiding structural damage or failure that may be caused by stress concentration.

[0052] Furthermore, both the lower column round steel pipe 1 and the upper column square steel pipe 2 are provided with internal stiffening plates 4. At this time, the internal stiffening plates 4 are divided into the first internal stiffening plate 4 provided in the lower column round steel pipe 1 and the second internal stiffening plate 4 provided in the upper column square steel pipe 2.

[0053] In some embodiments, the round tube to box type column node further includes a closed stiffening plate 6, which is located at one end of the arc-shaped force transmission plate 5 facing away from the transverse partition 3. The closed stiffening plate 6 is fixedly connected to the arc-shaped force transmission plate 5 and fixedly connected to the upper column square steel pipe 2.

[0054] In this embodiment, the design of the circular tube to box-shaped column node is further strengthened by introducing a closed stiffening plate 6, which enhances the structural integrity and load-bearing capacity of the node. The closed stiffening plate 6 is located at the end of the arc-shaped force transmission plate 5 facing away from the transverse partition 3. This means that the closed stiffening plate 6 is on the side of the arc-shaped force transmission plate 5 away from the transverse partition 3. This layout helps to form a closed structure around the node, thereby improving the overall stability and strength.

[0055] The fixed connection between the closed stiffening plate 6, the arc-shaped force transmission plate 5, and the upper column square steel pipe 2 ensures a more uniform and effective force transmission when under stress. This connection method not only enhances the supporting role of the arc-shaped force transmission plate 5, but also further stabilizes the structure of the entire node through the connection between the closed stiffening plate 6 and the upper column square steel pipe 2, making the force transmission path clearer and reducing the uncertainty of the structure under stress.

[0056] By installing the closed stiffening plate 6, the periphery of the circular tube to box-type column joint is reinforced. This helps to disperse and transfer these forces when the joint is subjected to external forces, reducing local stress concentration and preventing structural damage or failure caused by stress concentration. The use of the closed stiffening plate 6 improves the durability and reliability of the joint, making it more suitable for withstanding complex and variable load conditions. Especially in high-rise building structures, this design can significantly improve the safety and stability of the structure.

[0057] In some embodiments, the round tube to box-type column node further includes a triangular stiffening plate 7, which is disposed inside the lower column round steel tube 1. The triangular stiffening plate 7 is fixedly connected to the lower column round steel tube 1 and fixedly connected to the transverse partition 3.

[0058] In this embodiment, the design of the circular tube to box-type column node further enhances the stability and load-bearing capacity of the structure by adding a triangular stiffening plate 7. The triangular stiffening plate 7 is set inside the lower column circular steel tube 1 and is fixedly connected to both the lower column circular steel tube 1 and the transverse partition 3. This layout utilizes the stability principle of triangles, enhancing the torsional and bending resistance of the node by forming a triangular structure inside the circular tube.

[0059] The fixed connection between the triangular stiffening plate 7 and the lower column round steel pipe 1 ensures that the triangular stiffening plate 7 can effectively share and transfer the load when subjected to external loads. At the same time, the fixed connection between the triangular stiffening plate 7 and the transverse diaphragm 3 provides additional support for the transverse diaphragm 3, enhances the rigidity of the entire node, and enables the node to maintain the integrity of the structure when subjected to complex loads.

[0060] In some embodiments, the transverse partition 3 protrudes from the lower round steel pipe 1 and the upper square steel pipe 2 in a direction perpendicular to the extending direction of the lower round steel pipe 1 and the upper square steel pipe 2, and the outer contour of the transverse partition 3 encloses the projection pattern of the lower round steel pipe 1 and the upper square steel pipe 2 on the transverse partition 3.

[0061] In this embodiment, the transverse partition 3 has a unique structural feature. It protrudes in the direction perpendicular to the extension of the lower round steel pipe 1 and the upper square steel pipe 2, and its outer contour can completely enclose the projection of the lower round steel pipe 1 and the upper square steel pipe 2 on the transverse partition 3. This design allows the transverse partition 3 to not only structurally connect the lower round steel pipe 1 and the upper square steel pipe 2, but also to form a complete enveloping structure in space, enhancing the integrity and stability of the node.

[0062] The prominent design and enveloping characteristics of the transverse diaphragm 3 mean that it acts as a key connecting and supporting component in the structure. This design helps to distribute forces more evenly when the node is under load, reducing stress concentration and thus improving the overall load-bearing capacity and durability of the node. Simultaneously, this design also contributes to improved construction accuracy and convenience, as it provides a clear reference surface, making it easier for construction workers to align and fix the lower column round steel pipe 1 and the upper column square steel pipe 2, ensuring precise assembly and welding of the structure.

[0063] In some embodiments, the number of arc-shaped force transmission plates 5 is four;

[0064] Arc-shaped force transmission plates 5 are installed on all four planes of the upper column square steel pipe 2.

[0065] In this embodiment, the design of the circular tube to box-type column node takes into account the uniformity of force transmission and the integrity of the structure. Specifically, four arc-shaped force transmission plates 5 are designed, which means that arc-shaped force transmission plates 5 are provided on all four planes of the upper column square steel tube 2. This layout ensures that the force transmission from the lower column circular steel tube 1 to the upper column square steel tube 2 is balanced in all directions.

[0066] Each arc-shaped force transmission plate 5 is aligned with the curvature of the lower column circular steel pipe 1. This design allows each arc-shaped force transmission plate 5 to smoothly transition with the lower column circular steel pipe 1, and provides corresponding support on each surface of the upper column square steel pipe 2. This comprehensive arrangement helps to distribute loads in multiple directions, enhancing the stability and seismic performance of the joint.

[0067] Furthermore, the installation of four arc-shaped force transmission plates 5 helps to improve the flexibility and efficiency of construction. In actual construction, the installation and welding of the arc-shaped force transmission plates 5 can be carried out simultaneously on each side of the upper column square steel pipe 2, which can greatly shorten the construction cycle and improve the project progress.

[0068] In some embodiments, the transverse partition 3 is provided with grouting holes.

[0069] In this embodiment, the transverse partition 3 is designed with grouting holes, which serve as channels connecting the lower column round steel pipe 1 and the upper column square steel pipe 2, allowing for effective grouting operations between them. Since the lower column round steel pipe 1 and the upper column square steel pipe 2 are interconnected, the presence of grouting holes allows grouting material to be injected from one end and flow into the other end through the holes in the transverse partition 3, ensuring that the grouting material can evenly fill the space between the two steel pipes.

[0070] This design makes the grouting process more efficient because it allows workers to perform grouting operations in one location, while the grout material automatically flows through the grouting holes to the areas requiring grouting. This grouting method helps reduce air bubbles and voids that may occur during the grouting process, thereby ensuring a tight bond between the grout material and the steel pipe, as well as between the steel pipe and the transverse partitions.

[0071] In some embodiments, the arc-shaped force transmission plate 5 is provided with an overflow hole.

[0072] In this embodiment, the design of the arc-shaped force transmission plate 5 specifically includes overflow holes. The main function of these overflow holes is to provide a channel for excess concrete or grout to overflow during concrete pouring, thereby ensuring that the concrete can fully fill the space between the arc-shaped force transmission plate 5 and the upper column square steel pipe 2.

[0073] The placement of overflow holes helps ensure the compactness of the concrete pour, as they allow construction workers to observe when the concrete has completely filled the gap between the curved load transfer plate 5 and the upper column square steel pipe 2. When concrete overflows from the overflow holes, it is a clear signal that the space behind has been filled with concrete, thus avoiding voids in the structure and enhancing its overall strength and stability.

[0074] In one specific embodiment, the circular tube to box-type column node provided in this application includes a lower column circular steel pipe 1, an upper column square steel pipe 2, a transverse partition 3, an inner partition stiffening plate 4, an arc-shaped force transmission plate 5, a closed stiffening plate 6, and a triangular stiffening plate 7. The components are fixedly connected by welding.

[0075] This node design involves setting up a transition section, which can effectively transmit force. It is relatively simple to manufacture, has a large welding space between the various plates, and is highly feasible. Therefore, this node design is more suitable for promotion in practical engineering applications.

[0076] It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0077] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0078] The circular tube to box-type column node provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A circular tube to box-type column joint, characterized in that, include: Both the lower column round steel pipe and the upper column square steel pipe are vertically installed, with the upper column square steel pipe located at the upper end of the lower column round steel pipe; A transverse partition is provided between the lower column round steel pipe and the upper column square steel pipe. The transverse partition is fixedly connected to the lower column round steel pipe and the transverse partition is fixedly connected to the upper column square steel pipe. An arc-shaped force transmission plate is disposed on the side of the transverse partition facing the upper column square steel pipe. The arc of the arc-shaped force transmission plate is consistent with the arc of the lower column round steel pipe. The arc-shaped force transmission plate covers the outer side of the upper column square steel pipe. The arc-shaped force transmission plate is fixedly connected to the upper column square steel pipe and the arc-shaped force transmission plate is fixedly connected to the transverse partition. When pouring concrete into the circular tube-to-box column joint, concrete is poured inside the lower column circular steel tube, inside the upper column square steel tube, and between the arc-shaped force transmission plate and the upper column square steel tube.

2. The circular tube to box-shaped column joint according to claim 1, characterized in that, It also includes an inner stiffening plate, which is disposed inside the lower column round steel tube, and the extension direction of the inner stiffening plate is perpendicular to the extension direction of the lower column round steel tube; The inner stiffening plate is provided with grouting holes.

3. The circular tube to box-shaped column joint according to claim 1, characterized in that, It also includes an inner stiffening plate, which is disposed inside the upper column square steel tube, and the extension direction of the inner stiffening plate is perpendicular to the extension direction of the upper column square steel tube; The inner stiffening plate is provided with grouting holes.

4. The circular tube to box-shaped column joint according to claim 1, characterized in that, It also includes a closed stiffening plate, which is located at one end of the arc-shaped force transmission plate opposite to the transverse partition. The closed stiffening plate is fixedly connected to the arc-shaped force transmission plate and fixedly connected to the upper column square steel pipe.

5. The circular tube to box-shaped column joint according to claim 1, characterized in that, It also includes a triangular stiffening plate, which is disposed inside the lower column round steel tube and is fixedly connected to the lower column round steel tube, and is fixedly connected to the transverse partition.

6. The circular tube to box-shaped column joint according to claim 1, characterized in that, The transverse partition protrudes from the lower round steel pipe and the upper square steel pipe in a direction perpendicular to the extension direction of the lower round steel pipe and the upper square steel pipe, and the outer contour of the transverse partition encloses the projection pattern of the lower round steel pipe and the upper square steel pipe on the transverse partition.

7. The circular tube to box-shaped column joint according to claim 1, characterized in that, The number of the arc-shaped force transmission plates is four; The arc-shaped force transmission plate is provided on all four planes of the upper column square steel pipe.

8. The circular tube to box-shaped column joint according to claim 1, characterized in that, The transverse partition is provided with grouting holes.

9. The circular tube to box-shaped column joint according to claim 1, characterized in that, The arc-shaped force transmission plate is provided with an overflow hole.

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