A steel-concrete precast column joint connection structure

Abstract

This invention belongs to the field of building technology and discloses a joint connection structure for precast steel-concrete composite columns. It includes two coaxially arranged precast hollow concrete columns, each with a through-cavity for filling with cast-in-place concrete. A joint connection component is provided between two adjacent precast hollow concrete columns. The joint connection component has two radially extending end face connections and a central channel. The central channel is vertically connected and communicates with the through-cavity of the adjacent precast hollow concrete column. Each end face connection has a bearing surface adapted to the end face of the precast hollow concrete column, and a side connection groove is formed between the two end face connections. This invention can both support and receive the precast hollow concrete columns through the bearing surfaces and allow cast-in-place concrete to pass through and be formed within the precast hollow concrete columns, thus improving the integrity of the cast-in-place concrete within the overall structure.

Description

Technical Field

[0001] This invention belongs to the field of building technology, specifically relating to a steel-concrete precast column joint connection structure. Background Technology

[0002] Steel-reinforced concrete (SRC) structures, also known as steel-framed concrete structures or reinforced concrete structures, are structures in which steel sections are embedded within concrete, reinforced with longitudinal bars and stirrups. Compared to steel structures, SRC structures are encased in reinforced concrete, which significantly improves the torsional buckling performance of the steel sections and enhances the structure's durability and fire resistance. Compared to reinforced concrete structures, SRC structures can effectively reduce cross-sectional dimensions and improve seismic performance. SRC structures are favored by engineers due to their superior load-bearing performance and relatively low economic cost. The development of SRC structures in my country has been rapid, with increasingly widespread applications in super high-rise buildings, large-span structures, and heavy-duty industrial buildings. Projects such as the Guangzhou International Automobile Building, Shanghai World Financial Center, Xi'an Information Center Building, Shanghai Senmao Building, Shanghai Jinmao Building, and Shanghai World Financial Center all utilize SRC structures.

[0003] Most current steel-concrete composite columns are hollow structures, containing steel sections and stirrups. When connecting at joints, it is necessary to weld another steel section to connect the steel beam. However, the joint steel section is mostly directly connected to the steel beam by bolts or clamps, resulting in poor connection strength. Furthermore, the joint steel section is also directly welded to the steel sections of adjacent steel-concrete composite columns. This leads to poor stability at the joint or the connection between adjacent steel-concrete composite columns, and is also not conducive to the mutual support between the upper and lower steel-concrete composite columns, resulting in poor connectivity. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a steel-concrete precast column joint connection structure to solve the problems of poor stability and connectivity of existing steel-concrete precast column joint connection structures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precast steel-concrete composite column node connection structure includes two coaxially arranged precast hollow concrete columns. The precast hollow concrete columns have a through-cavity for filling with cast-in-place concrete. A node connection component is provided between two adjacent precast hollow concrete columns.

[0007] The node connecting component has two radially extending end face connecting portions and a central channel portion. The central channel portion is vertically continuous and communicates with the filling cavity of the adjacent precast concrete hollow column. Each end face connecting portion has a bearing surface adapted to the end face of the precast concrete hollow column. A side connecting groove is formed between the two end face connecting portions. An extended steel beam is connected to one side of the side connecting groove and is connected to the steel beam through the extended steel beam. The side connecting groove communicates with the central channel portion through at least one side flow hole, so that the cast-in-place concrete filling the central channel portion enters the side connecting groove to form an annular support pad.

[0008] The end face connection part is provided with at least two connection holes along the circumference. A groove is provided at one end of the connection hole near the side connection groove. A high-strength bolt is provided in the connection hole. The high-strength bolt has a fixed connection end and a threaded connection end. The threaded connection end is inserted into the end face of the corresponding side precast concrete hollow column and locked by the locking nut in the groove. The fixed connection end extends into the side connection groove to be embedded in the support pad.

[0009] In one possible implementation, each end of the central channel extends symmetrically along the axial direction to form an embedded section, which extends into the filling cavity of the corresponding precast concrete hollow column, and the outer diameter of the embedded section is less than or equal to the diameter of the filling cavity.

[0010] In one possible implementation, the end of the embedded segment opposite to the central channel portion is provided with a guide portion, which has an arc-shaped or oblique circumferential guide surface.

[0011] In one possible implementation, the end face of the precast concrete hollow column is provided with a threaded connection hole that is compatible with the threaded connection end.

[0012] In a possible implementation, an annular template is detachably connected to the outside of the node connecting component. The annular template closes the side connecting groove from the outside, so that the side connecting groove is enclosed to form a filling space suitable for the molding of the support pad.

[0013] The annular template has a clearance section for avoiding the overhanging steel beam.

[0014] In one possible implementation, a steel section assembly is fixedly installed in the filled cavity of the precast concrete hollow column. The steel section assembly includes an outer ring steel section and a cross-shaped steel section fixed inside the outer ring steel section.

[0015] The outer wall of the outer ring steel is provided with spiral grooves distributed along the axial direction. Spiral resistance increasing elements are provided in the spiral grooves and distributed along the spiral extension direction. The spiral resistance increasing elements are partially embedded in the side wall of the precast concrete hollow column.

[0016] In one possible implementation, the spiral resistance-enhancing element is a ribbed steel bar.

[0017] In one possible implementation, the precast hollow concrete column is further provided with annular reinforcing hoops inside.

[0018] In possible implementations, at least one second precast hollow concrete column is also included, wherein the precast hollow concrete column connected by the node connecting component is the first precast hollow concrete column;

[0019] The second precast hollow concrete column is coaxially connected to the first precast hollow concrete column, and at least one connecting end plate is provided between the two. The connecting end plate has a central hole and the diameter of the central hole is smaller than the outer diameter of the outer ring steel.

[0020] The sum of the heights of each of the connecting end plates is the interval height. The interval height allows the steel components of the second precast hollow concrete column and the first precast hollow concrete column to be spaced apart and form a cross-linking channel. The concrete formed in the cross-linking channel has a limiting relationship with the steel components.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The precast steel-concrete composite column node connection structure of the present invention, through node connection components with end face connection parts and central channel parts, can not only support the precast hollow concrete column through the bearing surface, but also allow the cast-in-place concrete to pass through and be formed in the precast hollow concrete column. This improves the integrity of the cast-in-place concrete in the overall structure, making the structure more robust and reliable. In addition, the side connection groove facilitates the installation of the extended steel beam, and the cast-in-place concrete can enter the side connection groove through the side flow hole to form a support pad. After being formed, the support pad can not only provide support, but also form an integral part with the concrete inside the column, greatly improving the overall connection and structural stability. At the same time, the high-strength bolts facilitate the positioning and installation of the precast hollow concrete column, and the fixed connection end of the high-strength bolt can be embedded in the support pad to improve the stability of this part and provide reinforcement. The overall structural design is reasonable and easy to install.

[0023] Moreover, the node connection component can be installed more quickly through the embedded section, and the guide part can improve the accuracy and convenience of installation, thus improving the installation efficiency. Furthermore, the threaded connection end of the high-strength bolt can facilitate the connection and fixation of the node connection component to the precast concrete hollow column, and the groove and lock nut can facilitate the locking and fixation.

[0024] Meanwhile, precast concrete hollow columns can form a honeycomb hollow structure through steel assemblies. This structure can generate circumferential restraint force on the core concrete. Conversely, precast concrete hollow columns can also generate circumferential restraint force on the steel assemblies, and at the same time provide lateral restraint force for the concrete columns, thereby improving the overall load-bearing capacity.

[0025] Furthermore, the spiral resistance-enhancing components installed in the spiral grooves can improve the tensile and compressive strength between the steel section and the concrete section, resulting in better support performance. The connecting end plates between the precast concrete hollow columns allow the cast-in-place concrete between the steel sections to flow, thereby forming a cross-linked structure. This cross-linked structure, together with the steel section, forms a limiting structure, which in turn improves the integrity and tensile strength between adjacent precast concrete hollow columns. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0027] Figure 2 For example Figure 1 A magnified schematic diagram of the node connection component on the side away from the steel beam and after filling with cast-in-place concrete;

[0028] Figure 3 for Figure 1 A magnified view of the node connection component on the side near the steel beam, before the cast-in-place concrete has been filled;

[0029] Figure 4 This is a cross-sectional view of the node connection component according to an embodiment of this application;

[0030] Figure 5 This is a top view of the node connection component according to an embodiment of this application;

[0031] Figure 6 This is a cross-sectional view of a precast hollow concrete column according to an embodiment of this application;

[0032] Figure 7 This is a top view of a precast hollow concrete column according to an embodiment of this application.

[0033] In the diagram: 1-Precast hollow concrete column; 11-Threaded connection hole; 12-Outer ring steel; 13-Cross steel; 14-Spiral resistance enhancer; 15-Annular reinforcing hoop; 2-Node connection component; 21-Side connection groove; 22-Embedded section; 23-Side flow hole; 24-Settling trough; 25-Guide part; 26-Bearing surface; 27-Central channel part; 28-End face connection part; 3-Steel beam; 4-Annular template; 5-Extended steel beam; 6-Cast-in-place concrete; 7-High-strength bolt; 71-Fixed connection end; 72-Threaded connection end; 73-Locking nut. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Please refer to Figure 1-7 As shown, an embodiment of this application provides a steel-concrete precast column node connection structure, including two coaxially arranged precast concrete hollow columns 1. The precast concrete hollow columns 1 have a filling cavity that runs vertically through the column and is used to fill the cast-in-place concrete 6. A node connection component 2 is provided between two adjacent precast concrete hollow columns 1.

[0037] The node connecting component 2 has two radially extending end face connecting portions 28 and a central channel portion 27. The central channel portion 27 is vertically continuous and communicates with the filling cavity of the adjacent precast concrete hollow column 1. Each end face connecting portion 28 has a bearing surface 26 adapted to the end face of the precast concrete hollow column 1. A side connecting groove 21 is formed between the two end face connecting portions 28. An extended steel beam 5 is connected to one side of the side connecting groove 21 and is connected to the steel beam 3 through the extended steel beam 5. The side connecting groove 21 communicates with the central channel portion 27 through at least one side flow hole 23 so that the cast-in-place concrete 6 filled in the central channel portion 27 enters the side connecting groove 21 to form an annular support pad.

[0038] The end face connection portion 28 is provided with at least two connection holes along the circumference. One end of the connection hole near the side connection groove 21 is provided with a groove 24. A high-strength bolt 7 is provided in the connection hole. The high-strength bolt 7 has a fixed connection end 71 and a threaded connection end 72. The threaded connection end 72 is inserted into the end face of the corresponding side precast concrete hollow column 1 and locked by the locking nut 73 in the groove 24. The fixed connection end 71 extends into the side connection groove 21 to be embedded in the support pad.

[0039] Through the above technical solution, the node connection component 2, which has an end face connection portion 28 and a central channel portion 27, can not only support the precast concrete hollow column 1 through the bearing surface 26, but also allow the cast-in-place concrete to pass through and be formed in the precast concrete hollow column 1. This improves the integrity of the cast-in-place concrete 6 in the overall structure, making the structure more robust and reliable. In addition, the side connection groove 21 facilitates the installation of the extended steel beam 5, and the cast-in-place concrete 6 can enter the side connection groove 21 through the side flow hole 23 to form a support pad. After being formed, the support pad can not only provide support, but also form an integral part with the concrete inside the column, greatly improving the overall connection and the stability of the structure. At the same time, the high-strength bolts 7 facilitate the positioning and installation of the precast concrete hollow column 1, and the fixed connection end of the high-strength bolts 7 can be embedded in the support pad to improve the stability of this part and play a strengthening role. The overall structural design is reasonable and easy to install.

[0040] In one embodiment, the two ends of the central channel portion 27 are symmetrically extended along the axial direction to form an embedded section 22, the embedded section 22 extending into the filling cavity of the corresponding side precast concrete hollow column 1, and the outer diameter of the embedded section 22 is less than or equal to the diameter of the filling cavity.

[0041] In this way, the node connection component 2 can be installed in place more quickly through the embedded segment 22, and can provide lateral restraint.

[0042] Furthermore, in order to improve the accuracy and convenience of the connection between the precast concrete hollow column 1 and the node connection component 2, the embedded section 22 is provided with a guide part 25 at one end away from the central channel part 27, and the guide part 25 has an arc-shaped or oblique circumferential guide surface.

[0043] In order to make the connection between the node connection component 2 and the precast concrete hollow column 1 more secure, the end face of the precast concrete hollow column 1 is provided with a threaded connection hole 11 that is compatible with the threaded connection end 72.

[0044] In a common application scenario, the outer side of the node connecting component 2 is detachably connected to an annular template 4. The annular template 4 closes the side connecting groove 21 from the outside, so that the side connecting groove 21 is enclosed to form a filling space suitable for the forming of the support pad block; the annular template 4 has a clearance part for avoiding the extended steel beam 5.

[0045] In this scenario, by installing the ring template 4, the concrete mortar entering the side connection groove 21 can be prevented from running out, and the forming of the support pad can be facilitated. After the support pad is formed, the extended steel beam 5 can also be connected together, further improving the strength of the connection.

[0046] In the embodiments of this application, a steel section is fixedly provided in the filling cavity of the precast concrete hollow column 1. The steel section includes an outer ring steel section 12 and a cross steel section 13 fixedly provided in the outer ring steel section 12. The outer side wall of the outer ring steel section 12 has a spiral groove distributed along the axial direction. The spiral groove is provided with a spiral resistance increasing element 14 distributed along its spiral extension direction. The spiral resistance increasing element 14 is partially embedded in the side wall of the precast concrete hollow column 1.

[0047] The precast hollow concrete column 1, through the steel assemblies, forms a honeycomb-like hollow structure. This structure generates circumferential restraint forces on the core concrete area. Conversely, the precast hollow concrete column 1 also generates circumferential restraint forces on the steel assemblies, while simultaneously providing lateral restraint forces to the concrete column, thus enhancing the overall load-bearing capacity. Furthermore, the spiral resistance-enhancing component 14, installed within the spiral groove, improves the tensile and compressive strength between the steel assemblies and the concrete portion, resulting in better support performance.

[0048] In the specific implementation process, the spiral resistance-increasing component 14 is preferably a ribbed steel bar, which can improve the stability of the connection.

[0049] Of course, a ring-shaped reinforcing bar 15 is also provided inside the precast concrete hollow column 1 to improve the stability of the precast concrete hollow column 1 structure.

[0050] In embodiments of this application, at least one second precast hollow concrete column 1 is further included. The precast hollow concrete column 1 connected by the node connecting component 2 is a first precast hollow concrete column 1. The second precast hollow concrete column 1 is coaxially connected to the first precast hollow concrete column 1, and at least one connecting end plate is provided between them. The connecting end plate has a central hole, and the diameter of the central hole is smaller than the outer diameter of the outer ring steel 12. The sum of the heights of each connecting end plate is the interval height. The interval height makes the steel components of the second precast hollow concrete column 1 and the first precast hollow concrete column 1 spaced apart from each other and form a cross-linking channel. The concrete formed in the cross-linking channel has a limiting relationship with the steel component.

[0051] In this way, the connecting end plates located between the precast concrete hollow columns 1 allow the cast-in-place concrete 6 between the steel sections to flow, thereby forming a cross-linked structure. This cross-linked structure, together with the steel sections, constitutes a limiting structure, which in turn improves the integrity and tensile strength between adjacent precast concrete hollow columns 1. Naturally, the adjacent second precast concrete hollow column 1 is also connected using the aforementioned structure and is also connected by high-strength bolts 7.

[0052] In summary, the steel-concrete precast column joint connection structure of this application has the following advantages:

[0053] The node connection component 2, which has an end face connection portion 28 and a central channel portion 27, can both support the precast hollow concrete column 1 through the bearing surface 26 and allow the cast-in-place concrete to pass through and be formed in the precast hollow concrete column 1. This improves the integrity of the cast-in-place concrete 6 in the overall structure, making the structure more robust and reliable. Furthermore, the side connection groove 21 facilitates the installation of the extended steel beam 5 and allows the cast-in-place concrete 6 to enter the side connection groove 21 through the side flow hole 23 to form a support pad. After being formed, the support pad can not only provide support but also form an integral part with the concrete inside the column, greatly improving the overall connection and structural stability. At the same time, the high-strength bolts 7 facilitate the positioning and installation of the precast hollow concrete column 1, and the fixed connection end of the high-strength bolts 7 can be embedded in the support pad to improve the stability of this part and play a reinforcing role. The overall structural design is reasonable and easy to install.

[0054] Furthermore, the node connection component 2 can be installed more quickly through the embedded section 22, and the guide part 25 can improve the accuracy and convenience of installation, thus improving installation efficiency. In addition, the threaded connection end 72 of the high-strength bolt 7 can facilitate the connection and fixation of the node connection component 2 to the precast concrete hollow column 1, and can also facilitate the locking and fixation through the groove 24 and the locking nut 73.

[0055] Meanwhile, the precast concrete hollow column 1 can form a honeycomb hollow structure through the steel section assembly. This structure can generate circumferential restraint force on the core concrete. Conversely, the precast concrete hollow column 1 can also generate circumferential restraint force on the steel section assembly, and at the same time provide lateral restraint force for the concrete column, thereby improving the overall load-bearing capacity.

[0056] Furthermore, the spiral resistance-enhancing component 14, which is installed in the spiral groove, can improve the tensile and compressive strength between the steel section and the concrete section, resulting in better support performance. The connecting end plate between the precast concrete hollow columns 1 allows the cast-in-place concrete 6 between the steel sections to flow, thereby forming a cross-linked structure. The cross-linked structure and the steel section form a limiting structure, which can further improve the integrity and tensile strength between adjacent precast concrete hollow columns 1.

[0057] Finally, it should be noted that 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 should be included within the scope of protection of the present invention.

Claims

1. A steel-concrete precast column joint connection structure, characterized in that: It includes two coaxially arranged precast hollow concrete columns, each precast hollow concrete column having a through-cavity for filling with cast-in-place concrete, and a node connecting component between two adjacent precast hollow concrete columns. The node connecting component has two radially extending end face connecting portions and a central channel portion. The central channel portion is vertically continuous and communicates with the filling cavity of the adjacent precast concrete hollow column. Each end face connecting portion has a bearing surface adapted to the end face of the precast concrete hollow column. A side connecting groove is formed between the two end face connecting portions. An extended steel beam is connected to one side of the side connecting groove and is connected to the steel beam through the extended steel beam. The side connecting groove communicates with the central channel portion through at least one side flow hole, so that the cast-in-place concrete filling the central channel portion enters the side connecting groove to form an annular support pad. The end face connection part is provided with at least two connection holes along the circumference. A groove is provided at one end of the connection hole near the side connection groove. A high-strength bolt is provided in the connection hole. The high-strength bolt has a fixed connection end and a threaded connection end. The threaded connection end is inserted into the end face of the corresponding side precast concrete hollow column and locked by the locking nut in the groove. The fixed connection end extends into the side connection groove to be embedded in the support pad. The two ends of the central channel are symmetrically extended along the axial direction to form an embedded section. The embedded section extends into the filling cavity of the corresponding precast concrete hollow column, and the outer diameter of the embedded section is less than or equal to the diameter of the filling cavity.

2. The precast steel-concrete composite column joint connection structure according to claim 1, characterized in that: The embedded section has a guide portion at one end away from the central channel portion, and the guide portion has an arc-shaped or oblique circumferential guide surface.

3. The precast steel-concrete composite column joint connection structure according to claim 1, characterized in that: The end face of the precast concrete hollow column is provided with a threaded connection hole that is compatible with the threaded connection end.

4. The precast steel-concrete composite column joint connection structure according to claim 1, characterized in that: The outer side of the node connecting component is detachably connected to an annular template, which closes the side connecting groove from the outside so that the side connecting groove is enclosed to form a filling space suitable for the forming of the support pad block. The annular template has a clearance section for avoiding the overhanging steel beam.

5. A precast steel-concrete composite column joint connection structure according to any one of claims 1-4, characterized in that: The precast concrete hollow column is filled with a steel section assembly, which includes an outer ring steel section and a cross-shaped steel section fixed inside the outer ring steel section. The outer wall of the outer ring steel is provided with spiral grooves distributed along the axial direction. Spiral resistance increasing elements are provided in the spiral grooves and distributed along the spiral extension direction. The spiral resistance increasing elements are partially embedded in the side wall of the precast concrete hollow column.

6. The precast steel-concrete composite column joint connection structure according to claim 5, characterized in that: The spiral resistance-enhancing component is a ribbed steel bar.

7. The precast steel-concrete composite column joint connection structure according to claim 6, characterized in that: The precast concrete hollow column is also equipped with annular reinforcing hoops inside.

8. The precast steel-concrete composite column joint connection structure according to claim 5, characterized in that: It also includes at least one second precast hollow concrete column, and the precast hollow concrete column connected by the node connecting component is the first precast hollow concrete column; The second precast hollow concrete column is coaxially connected to the first precast hollow concrete column, and at least one connecting end plate is provided between the two. The connecting end plate has a central hole and the diameter of the central hole is smaller than the outer diameter of the outer ring steel. The sum of the heights of each of the connecting end plates is the interval height. The interval height allows the steel components of the second precast hollow concrete column and the first precast hollow concrete column to be spaced apart and form a cross-linking channel. The concrete formed in the cross-linking channel has a limiting relationship with the steel components.

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