Connection joint and connection method between steel column and frame concrete column

Abstract

This invention relates to the field of building construction technology, specifically to a connection node and method between a steel column and a frame concrete column. The connection node includes a concrete column with embedded reinforcing bars inside. A steel column is located outside the concrete column, and the steel column includes a second straight steel pipe section. Evenly distributed fastening modules are installed through the second straight steel pipe section, with the portion of the fastening modules located inside the second straight steel pipe section embedded within the concrete column. The fastening modules enhance the connection strength between the steel column and the concrete column. During construction, the nail heads and shanks in the fastening modules are pulled outwards, allowing the nail heads to fit against the inner wall of the second straight steel pipe section. This reduces collision interference between the embedded reinforcing bars and the fastening modules when the steel column covers the embedded reinforcing bars. The cooperation between the internally threaded sleeve and the threaded rod facilitates the fixing of the nail heads and shanks to the second straight steel pipe section, eliminating the need for welding the shanks from inside the second straight steel pipe section.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a connection node and connection method between steel columns and frame concrete columns. Background Technology

[0002] Columns made of reinforced concrete are the most basic load-bearing components in various engineering structures such as houses, bridges, and hydraulic structures. They are commonly used as supports for floors, piers, foundation columns, towers, and compression members of trusses. For example, the pipe racks in pipe galleries are mostly concrete frame structures with steel structural members connected to the top of the concrete columns. However, concrete generally cannot be directly connected to the steel structure. Therefore, it is usually necessary to pre-embed steel bars in the concrete columns and then put box-shaped steel columns over the columns. Finally, the upper steel structure pipe rack is hoisted onto the box-shaped steel columns for welding connection.

[0003] Currently, the most common method for installing box-shaped steel columns over upright columns involves binding pre-embedded reinforcing bars, covering the outside of the pre-embedded reinforcing bars with the box-shaped steel column, and then pouring concrete into the box-shaped steel column. However, the connection between the concrete and the box-shaped steel column is poor, which means that the box-shaped steel column cannot bear the pressure together with the concrete, resulting in poor overall strength of the concrete. Summary of the Invention

[0004] To address the aforementioned issues, embodiments of the present invention provide a connection node and connection method between steel columns and frame concrete columns.

[0005] In one aspect of the present invention, a connection node between a steel column and a frame concrete column is provided, including a concrete column, in which pre-embedded steel bars are provided, and a steel column is provided on the outside of the concrete column. The steel column includes a second straight steel pipe, and uniformly distributed fastening modules are provided through the second straight steel pipe. The portion of the fastening modules located on the inside of the second straight steel pipe is pre-embedded in the concrete column. The fastening module includes a through hole in the second straight section of the steel pipe, a reinforcing seat is provided on the outer wall of the second straight section of the steel pipe at a position opposite to the through hole, and a nail rod is inserted into the second straight section of the steel pipe through the reinforcing seat and the through hole in sequence; a nail head is provided at the inner end of the nail rod. An internally threaded sleeve is fixed on the outer side of the reinforcing seat away from the second straight section of the steel pipe. A threaded rod is threaded into the internally threaded sleeve, and the threaded rod is connected to the nail rod.

[0006] Optionally, the top of the second straight section of the steel pipe is coaxially connected to the first straight section of the steel pipe via a transition section of the steel pipe.

[0007] Optionally, elliptical protrusions are evenly distributed at equal angles around the outer periphery of the nail head.

[0008] Optionally, a straight hexagonal prism is fixed to the outer end of the threaded rod.

[0009] Optionally, the through holes are evenly distributed according to the gaps in the pre-embedded reinforcing bars.

[0010] Another aspect of the present invention provides a method for connecting a steel column and a frame concrete column, comprising: Select a steel pipe of appropriate diameter according to the design dimensions, and cut a second straight section of steel pipe using the selected steel pipe; Based on the distribution pattern of the gaps in the pre-embedded steel bars, through holes are opened on the second straight section of the steel pipe. Multiple rows of through holes can be set along the axial direction of the second straight section of the steel pipe. A reinforcing seat is fixed at each through hole position on the outer wall of the second straight section of the steel pipe, and an internally threaded sleeve is fixed on the outer surface of the reinforcing seat; Fabricate a nail head and nail rod assembly structure and insert it into the through hole, reinforcing seat, and internal threaded sleeve, and connect the threaded rod to the outer end of the nail rod; Rotate the threaded rod outward to move the nail head until the nail head is in close contact with the inner wall of the second straight section of the steel pipe; The second straight section of steel pipe is placed outside the pre-embedded steel bar. After adjusting the position, the threaded rod is rotated in the opposite direction to move the nail rod and nail head until the straight hexagonal prism and the internal threaded sleeve are tightly pressed together. At this time, the nail head and nail rod extend into the gap of the pre-embedded steel bar. Finally, concrete is poured into the second straight section of steel pipe to form a connection node.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the design of the gradually changing steel pipe provides longitudinal restraint, enabling the steel column to better withstand longitudinal shear force together with the concrete. At the same time, the fastening module enhances the connection between the steel column and the concrete column. During construction, the nail head and nail rod in the fastening module are pulled outward, allowing the nail head to fit against the inner wall of the second straight steel pipe. When the steel column covers the embedded reinforcing bars, the collision between the embedded reinforcing bars and the fastening module is reduced, thus reducing interference. In addition, the threaded engagement of the internal threaded sleeve and the threaded rod facilitates the fixing of the nail head and nail rod to the second straight steel pipe, eliminating the need for welding the nail rod from the inside of the second straight steel pipe. The engagement of the nail head and the protrusion with the concrete further strengthens the connection between the second straight steel pipe and the concrete. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. In the drawings: Figure 1 A structural schematic diagram of a connection node between a steel column and a frame concrete column provided by the present invention; Figure 2 An exploded structural diagram of a connection node between a steel column and a frame concrete column provided by the present invention. Figure 3 A schematic diagram of the structure of a fastening module provided by the present invention; Figure 4This invention provides a schematic diagram of the structure of a nail head and nail shank. Figure 5 A schematic diagram of a steel pipe structure provided by the present invention.

[0013] Among them, 1 is a concrete column, 2 is a pre-embedded steel bar, 3 is a first straight section steel pipe, 4 is a gradually changing section steel pipe, 5 is a second straight section steel pipe, 6 is a fastening module, 7 is a through hole, 8 is a reinforcing seat, 9 is a nail rod, 10 is a nail head, 11 is a protrusion, 12 is an internal threaded sleeve, 13 is a threaded rod, and 14 is a straight hexagonal prism. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0015] See Figures 1-5 The present invention provides a connection node between a steel column and a frame concrete column, including a concrete column 1, a pre-embedded steel bar 2 inside the concrete column 1, a steel column outside the concrete column 1, the steel column including a second straight steel pipe 5, and fastening modules 6 uniformly distributed through the second straight steel pipe 5, the portion of the fastening module 6 placed inside the second straight steel pipe 5 being pre-embedded in the concrete column 1. The fastening module 6 includes a through hole 7 opened in the second straight section steel pipe 5. A reinforcing seat 8 is provided on the outer wall of the second straight section steel pipe 5 at a position opposite to the through hole 7. A nail rod 9 is inserted into the second straight section steel pipe 5 through the reinforcing seat 8 and the through hole 7 in sequence. A nail head 10 is provided at the inner end of the nail rod 9. An internally threaded sleeve 12 is fixed on the outer side of the reinforcing seat 8 away from the second straight section steel pipe 5. A threaded rod 13 is threaded into the internally threaded sleeve 12, and the threaded rod 13 is connected to the nail rod 9.

[0016] During implementation, the top of the second straight section steel pipe 5 is coaxially connected to the first straight section steel pipe 3 via the transition section steel pipe 4.

[0017] During implementation, elliptical protrusions 11 are evenly and at equal angles on the outer periphery of the nail head 10.

[0018] During implementation, a straight hexagonal prism 14 is fixed to the outer end of the threaded rod 13.

[0019] During implementation, the through holes 7 are evenly distributed according to the gaps in the pre-embedded steel bars 2; the pre-embedded steel bars 2 include horizontal steel bars and vertical steel bars, and gaps are formed between them. The alignment of the through holes with the gaps allows the nail head 10 and nail rod 9 to be inserted into the pre-embedded steel bars 2 for pre-embedding.

[0020] During construction, steel pipes of appropriate diameter and transition sections are selected according to the design dimensions. First and second straight sections are cut from the selected steel pipes, and these sections are coaxially welded together to form the steel column body. Then, based on the distribution pattern of the pre-embedded reinforcing bars, through holes are drilled in the second straight section. Multiple rows of through holes can be arranged along the axial direction of the second straight section. A reinforcing seat is fixed at each through hole position on the outer wall of the second straight section, and an internally threaded sleeve is fixed to the outer surface of the reinforcing seat. Finally, nail head and rod assemblies are fabricated. The structure is assembled and inserted into the through hole, reinforcing seat, and internal threaded sleeve; a threaded rod is connected to the outer end of the nail rod, and a straight hexagonal prism is fixed to the outer end of the threaded rod; the straight hexagonal prism is rotated to move the nail head of the nail rod outward through the threaded rod until the nail head is tightly against the inner wall of the second straight section of the steel pipe; the steel column body is placed over the pre-embedded reinforcing bars, and after adjusting the position, the straight hexagonal prism is rotated in the opposite direction to move the nail head of the nail rod inward through the threaded rod until the straight hexagonal prism and the internal threaded sleeve are tightly pressed together, at which point the nail head and nail rod extend into the gap of the pre-embedded reinforcing bars; finally, concrete is poured into the steel column body to form a connection node.

[0021] The solution provided by this invention features a gradually changing steel pipe design that provides longitudinal constraint, enabling the steel column to better withstand longitudinal shear forces together with the concrete. Simultaneously, the fastening module enhances the connection strength between the steel column and the concrete column. During construction, the nail heads and shanks in the fastening module are pulled outwards, allowing the nail heads to fit against the inner wall of the second straight steel pipe. This reduces collisions between the embedded reinforcing bars and the fastening module when the steel column covers the embedded reinforcing bars, minimizing interference. Furthermore, the threaded engagement between the internal threaded sleeve and the threaded rod facilitates the fixing of the nail heads and shanks to the second straight steel pipe, eliminating the need for welding the shanks from the inside of the second straight steel pipe. The engagement of the nail heads and protrusions with the concrete further strengthens the connection between the second straight steel pipe and the concrete.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A connection node between a steel column and a frame concrete column, comprising a concrete column, wherein embedded reinforcing bars are provided inside the concrete column, and a steel column is provided outside the concrete column, characterized in that, The steel column includes a second straight steel pipe section, through which uniformly distributed fastening modules are installed. The portion of the fastening modules located inside the second straight steel pipe section is embedded in the concrete column. The fastening module includes a through hole in the second straight section of the steel pipe, a reinforcing seat is provided on the outer wall of the second straight section of the steel pipe at a position opposite to the through hole, and a nail rod is inserted into the second straight section of the steel pipe through the reinforcing seat and the through hole in sequence; a nail head is provided at the inner end of the nail rod. An internally threaded sleeve is fixed on the outer side of the reinforcing seat away from the second straight section of the steel pipe. A threaded rod is threaded into the internally threaded sleeve and connected to the nail rod. A straight hexagonal prism is fixed to the outer end of the threaded rod. The top of the second straight steel pipe is coaxially connected to the first straight steel pipe through the transition steel pipe; the design of the transition steel pipe provides longitudinal restraint, enabling the steel column to better withstand longitudinal shear force together with the concrete, while the fastening module enhances the connection between the steel column and the concrete column. During construction, steel pipes of appropriate diameter are selected according to the design dimensions, and the second straight section of steel pipe is cut from the selected steel pipe. Based on the distribution pattern of the gaps in the pre-embedded steel bars, through holes are opened on the second straight section of the steel pipe, and multiple rows of through holes are set along the axial direction of the second straight section of the steel pipe. A reinforcing seat is fixed at each through hole position on the outer wall of the second straight section of the steel pipe, and an internally threaded sleeve is fixed on the outer surface of the reinforcing seat; Fabricate a nail head and nail rod assembly structure and insert it into the through hole, reinforcing seat, and internal threaded sleeve, and connect the threaded rod to the outer end of the nail rod; Rotate the threaded rod outward to move the nail head until the nail head is in close contact with the inner wall of the second straight section of the steel pipe; The second straight section of steel pipe is placed outside the pre-embedded steel bar. After adjusting the position, the threaded rod is rotated in the opposite direction to move the nail rod and nail head until the straight hexagonal prism and the internal threaded sleeve are tightly pressed together. At this time, the nail head and nail rod extend into the gap of the pre-embedded steel bar. Finally, concrete is poured into the second straight section of steel pipe to form a connection node.

2. The connection node between the steel column and the frame concrete column as described in claim 1, characterized in that, The nail head has elliptical protrusions evenly spaced at equal angles on its outer periphery.

3. The connection node between the steel column and the frame concrete column as described in claim 1, characterized in that, The through holes are evenly distributed according to the gaps in the pre-embedded reinforcing bars.

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