A composite steel-concrete beam-column joint structure with corbel sleeve and construction method

Abstract

This invention belongs to the field of cast-in-place concrete structure engineering technology, and discloses a corbel sleeve combined steel-concrete beam-column joint structure and construction method. The joint structure achieves the connection and fixation of the reinforcing bars in the steel-concrete beam-column joint area by setting first and second corbels of different sizes and cleverly positioning the sleeves. When connecting and fixing the top and bottom reinforcement bars of the reinforced concrete beam, the second top reinforcement bar is installed first, followed by the first top reinforcement bar; the second bottom reinforcement bar is installed first, followed by the first bottom reinforcement bar. The reinforcement bars are connected from the inside out to the sleeves at their respective positions and the corresponding corbel flanges, thus achieving the connection and fixation between the reinforcement bars and the steel column. Furthermore, second and fourth sleeves are respectively set on the first and second corbels to connect the second vertical reinforcement bars, ensuring the connection quality between the vertical reinforcement bars and the corbels. Stiffening strips are set in the same vertical direction on each sleeve, ensuring the overall bearing capacity of the vertical reinforcement bars in the vertical direction, which is beneficial to the structural stress, has high reliability, reduces construction difficulty, and shortens the construction period.

Description

Technical Field

[0001] This invention belongs to the field of cast-in-place concrete structure engineering technology, specifically relating to a corbel sleeve combined steel-concrete beam-column joint structure and its construction method. Background Technology

[0002] With the rapid development of urban rail transit in my country, in order to improve the visibility and passenger flow of underground stations, large-span, low-column structures are often used in subway construction. Steel-concrete composite structures are widely used as important load-bearing components in large-span structures, as they have the characteristics of strong load-bearing capacity, high stiffness, and excellent seismic performance.

[0003] Currently, steel-concrete composite beam-column joint structures often employ methods such as stiffening rib extension plates, connecting sleeves, and welded corbels to individually meet the connection requirements of the main reinforcing bars in reinforced concrete beams. This approach is well-suited for reinforced concrete beams with a single row of main reinforcing bars. However, for large-span structures subjected to significant stress, reinforced concrete beams are typically designed with multiple rows of main reinforcing bars to ensure structural safety. Therefore, considering the multi-row reinforcement arrangement in the steel-concrete composite beam-column joint area, the current approach largely continues to use a single-row reinforcement connection structure, while increasing the number of sleeve rows, stiffening rib extension plates, and steel corbel flanges to match the longitudinal reinforcement arrangement requirements of the concrete beam. However, this structure and construction method present the following problems:

[0004] (1) If both ends of the main reinforcing bar are connected to the steel column through sleeves, during the installation process, one end of the sleeve is mechanically tightened and then screwed into the other end of the sleeve in the opposite direction. This requires the length of the main reinforcing bar to be slightly less than the length of the beam, and both ends cannot be completely screwed into the bottom of the sleeve, resulting in poor reinforcement connection and unfavorable structural stress.

[0005] (2) By increasing the number of stiffening rib extension plates and increasing the number of steel corbel flange plates, a connection platform can be provided for multiple rows of reinforcing bars. However, the spacing of multiple rows of main reinforcing bars at the top (bottom) of reinforced concrete beams is small, which results in a small spacing between the extension plates or corbel flange plates at the top (bottom). Furthermore, due to the dense arrangement of the main reinforcing bars, it is easy for the area between the extension plates or corbel flange plates at the top (bottom) to be difficult to pour densely or even become void during concrete pouring, posing a safety hazard.

[0006] Therefore, a new technology is needed to solve the problems of complex construction, poor reliability, and high construction difficulty of steel-concrete beam-column joint structures in existing technologies. Summary of the Invention

[0007] To address the aforementioned problems in the prior art, this invention provides a corbel sleeve combined steel-concrete beam-column joint structure, which optimizes the joint structure construction, improves reliability, and facilitates construction. Another objective of this invention is to provide a construction method for the corbel sleeve combined steel-concrete beam-column joint structure, ensuring construction quality, reducing construction difficulty, and shortening the construction period.

[0008] The present invention adopts the following technical solution:

[0009] A corbel sleeve combined steel-concrete beam-column joint structure includes steel columns and reinforced concrete beams. The steel columns include a first steel column and a second steel column. The first steel column is provided with a first corbel device, and the second steel column is provided with a second corbel device. The reinforced concrete beam includes top reinforcement and bottom reinforcement, which are connected to the steel columns through the first corbel device and the second corbel device. Vertical reinforcement is provided on the outer periphery of both the first and second steel columns. The vertical reinforcement includes a first vertical reinforcement and a second vertical reinforcement, which are connected to the first corbel device and the second corbel device.

[0010] The first bracket device includes a first bracket and a first sleeve assembly. The first sleeve assembly includes a first sleeve and a second sleeve. The first sleeve is disposed inside the first bracket and is perpendicularly disposed on the outer surface of the flange plate of the first steel column. The second sleeve is disposed on the outer surface of the flange plate of the first bracket and is perpendicular to the outer surface of the flange plate of the first bracket.

[0011] The second bracket device includes a second bracket and a second sleeve assembly. The second sleeve assembly includes a third sleeve and a fourth sleeve. The third sleeve is disposed outside the second bracket and is perpendicular to the outer surface of the flange plate of the second steel column. The fourth sleeve is disposed on the outer surface of the flange plate of the second bracket and is perpendicular to the outer surface of the flange plate of the second bracket.

[0012] The gluten includes a first gluten and a second gluten. One end of the second gluten is connected to the first sleeve, and the other end is connected to the outer surface of the flange plate of the second bracket. One end of the first gluten is connected to the third sleeve, and the other end is connected to the outer surface of the flange plate of the first bracket.

[0013] The bottom reinforcement includes a first bottom reinforcement and a second bottom reinforcement. One end of the second bottom reinforcement is connected to the first sleeve, and the other end is connected to the outer surface of the flange plate of the second corbel. One end of the first bottom reinforcement is connected to the third sleeve, and the other end is connected to the outer surface of the flange plate of the first corbel.

[0014] Furthermore, the second sleeve is connected to one end of the second vertical reinforcing bar, and the fourth sleeve is connected to one end of the second vertical reinforcing bar.

[0015] Furthermore, the first sleeve, the second sleeve, the third sleeve, and the fourth sleeve are provided with internal threads.

[0016] Furthermore, each of the first sleeve, the second sleeve, the third sleeve, and the fourth sleeve is provided with a plurality of units.

[0017] Furthermore, the web of the first corbel is vertically connected to the web of the first steel column, and the web of the second corbel is vertically connected to the web of the second steel column.

[0018] Furthermore, the width of the first corbel is consistent with the width of the flange plate of the first steel column; the length of the first corbel must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the first corbel is determined by the following formula:

[0019] H1 = H - h1 - h2 - d1 - d2

[0020] In the formula, H1 is the height of the first corbel, H is the height of the reinforced concrete beam, h1 is the thickness of the protective layer of the first top reinforcement, h2 is the thickness of the protective layer of the first bottom reinforcement, d1 is the diameter of the first top reinforcement, and d2 is the diameter of the first bottom reinforcement.

[0021] The width of the second bracket is the same as the width of the flange of the second steel column; the length of the first bracket must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the second bracket is determined by the following formula:

[0022] H2=H-h3-h4-d3-d4

[0023] In the formula, H2 is the height of the second corbel, H is the height of the reinforced concrete beam, h3 is the thickness of the protective layer of the second top reinforcement, h4 is the thickness of the protective layer of the second bottom reinforcement, d3 is the diameter of the second top reinforcement, and d4 is the diameter of the second bottom reinforcement.

[0024] Furthermore, the first steel column has a first stiffening rib horizontally provided at the horizontal corresponding position of the flange plate of the first corbel; the second steel column has a second stiffening rib horizontally provided at the horizontal corresponding position of the flange plate of the second corbel.

[0025] Furthermore, the first brace is provided with a first stiffening strip, which is in the same vertical direction as the second sleeve; the second brace is provided with a second stiffening strip, which is in the same vertical direction as the fourth sleeve.

[0026] Furthermore, there are several first stiffening bars and several second stiffening bars.

[0027] A construction method for a corbel sleeve composite steel-concrete beam-column joint structure, the construction method includes the following steps:

[0028] S1. Determine the width, length, and height of the first cow leg;

[0029] Determine the width, length, and height of the second cow leg;

[0030] Determine the quantity and position of the first sleeve and the second sleeve;

[0031] Determine the quantity and position of the third and fourth sleeves;

[0032] The first leg is provided with a first stiffening strip, and the second leg is provided with a second stiffening strip. The position and number of the first stiffening strip and the second stiffening strip are determined.

[0033] S2. Perform factory prefabrication of the first type of steel column and the second type of steel column;

[0034] Connect the first bracket to the flange plate of the first steel column, and connect the second bracket to the flange plate of the second steel column;

[0035] Install the first sleeve, the second sleeve, the third sleeve, and the fourth sleeve;

[0036] Install the first stiffening strip and the second stiffening strip;

[0037] The first type of steel column is provided with a first stiffening rib, and the first stiffening rib is installed;

[0038] The second type of steel column is provided with a second stiffening rib, and the second stiffening rib is installed.

[0039] S3. Transport the first and second steel columns, which have been prefabricated in steps S1 and S2, to the construction site. After positioning and installing the first and second steel columns using hoisting equipment, install the vertical reinforcing bars according to the design requirements. Connect the second vertical reinforcing bars to the second sleeve and to the fourth sleeve.

[0040] Install the second rib first, then install the first rib;

[0041] Install the second bottom reinforcement bar first, then install the first bottom reinforcement bar.

[0042] S4. After all the vertical reinforcement bars of the first and second steel columns are tied, and all the top and bottom reinforcement bars of the reinforced concrete beam are tied, concrete is poured to form a corbel sleeve combined steel-concrete beam-column joint structure.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention sets a first corbel and a second corbel of different sizes on the steel column, sets a first sleeve inside the first corbel, and sets a third sleeve outside the second corbel. During on-site construction, when connecting the top and bottom reinforcement bars of the reinforced concrete beam to the steel column, the second top reinforcement bar is installed first, followed by the first top reinforcement bar; the second bottom reinforcement bar is installed first, followed by the first bottom reinforcement bar. The sleeves and corbel flanges at their respective positions are connected from the inside out. This node structure facilitates on-site construction and reduces construction difficulty. Specifically, in the first step, one end of the second reinforcing bar is mechanically connected to the first sleeve, and the other end is welded to the outer surface of the second corbel. In the second step, one end of the first reinforcing bar is mechanically connected to the third sleeve, and the other end is welded to the outer surface of the first corbel. In the third step, one end of the second bottom reinforcing bar is mechanically connected to the first sleeve, and the other end is welded to the outer surface of the second corbel. Finally, one end of the first bottom reinforcing bar is mechanically connected to the third sleeve, and the other end is welded to the outer surface of the first corbel. This achieves the connection and fixation of the reinforcing bars of the reinforced concrete beam to the steel column. In addition, by setting the second and fourth sleeves, the connection and fixation of the second vertical reinforcing bars are facilitated, ensuring the quality of the connection between the vertical reinforcing bars and the corbel. At the same time, it is beneficial to the structural stress, has high reliability, and can avoid the situation where the spacing is too small due to the complex structure and the setting of multiple stiffening plates or corbel flange plates, resulting in incomplete concrete pouring or even voids. This ensures the quality of concrete pouring and reduces the difficulty of on-site construction. Attached Figure Description

[0044] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0045] Figure 1 This is a front view of the node structure;

[0046] Figure 2 This is a top view of the node structure;

[0047] Figure 3 This is a side view of the first type of steel column and the first corbel;

[0048] Figure 4 This is a side view of the second type of steel column and the second corbel.

[0049] Figure label:

[0050] 1-Type steel column; 11-First type steel column; 111-Web plate of the first type steel column; 112-Flange plate of the first type steel column; 12-Second type steel column; 121-Web plate of the second type steel column; 122-Flange plate of the second type steel column;

[0051] 2-First bracket assembly; 21-First bracket; 211-Blouse of the first bracket; 212-Flange of the first bracket; 22-First sleeve assembly; 221-First sleeve; 222-Second sleeve;

[0052] 3-Second bracket assembly; 31-Second bracket; 311-Blouse of the second bracket; 312-Flange of the second bracket; 32-Second sleeve assembly; 321-Third sleeve; 322-Fourth sleeve;

[0053] 4-Reinforced concrete beam; 41-Top reinforcement; 411-First top reinforcement; 412-Second top reinforcement; 42-Bottom reinforcement; 421-First bottom reinforcement; 422-Second bottom reinforcement; 43-Concrete cover;

[0054] 5 - Vertical reinforcement; 51 - First vertical reinforcement; 52 - Second vertical reinforcement;

[0055] 6-Strengthening rib; 61-First strengthening rib; 62-Second strengthening rib;

[0056] 7-Stretcher; 71-First stiffener; 72-Second stiffener;

[0057] H - Height of the reinforced concrete beam; H1 - Height of the first corbel; H2 - Height of the second corbel; h1 - Thickness of the protective layer of the first top reinforcement; h2 - Thickness of the protective layer of the first bottom reinforcement; h3 - Thickness of the protective layer of the second top reinforcement; h4 - Thickness of the protective layer of the second bottom reinforcement; d1 - Diameter of the first top reinforcement; d2 - Diameter of the first bottom reinforcement; d3 - Diameter of the second top reinforcement; d4 - Diameter of the second bottom reinforcement; B1 - Width of the first corbel; b1 - Width of the flange plate of the first steel column; B2 - Width of the second corbel; b2 - Width of the flange plate of the second steel column. Detailed Implementation

[0058] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the accompanying drawings indicate the same or similar parts.

[0059] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0060] Reference Figures 1 to 4 A corbel sleeve combined steel-concrete beam-column joint structure includes a steel column 1 and a reinforced concrete beam 4. The steel column 1 includes a first steel column 11 and a second steel column 12. The first steel column 11 is provided with a first corbel device 2, and the second steel column 12 is provided with a second corbel device 3. The reinforced concrete beam 4 includes top reinforcement 41 and bottom reinforcement 42. The top reinforcement 41 and the bottom reinforcement 42 are connected to the steel column 1 through the first corbel device 2 and the second corbel device 3. Vertical reinforcement 5 is provided on the outer periphery of both the first steel column 11 and the second steel column 12. The vertical reinforcement 5 includes a first vertical reinforcement 51 and a second vertical reinforcement 52. The second vertical reinforcement 52 is connected to the first corbel device 2 and the second corbel device 3. The vertical reinforcement is surrounded by a first stirrup for reinforcement. The vertical reinforcement is perpendicular to the ground, and the first stirrup is parallel to the ground. The structure formed by the vertical reinforcement, the first stirrup, and the steel column is formed by pouring concrete to form a steel-concrete column with a certain protective layer thickness.

[0061] The first bracket device 2 includes a first bracket 21 and a first sleeve assembly 22. The first sleeve assembly 22 includes a first sleeve 221 and a second sleeve 222. The first sleeve 221 is disposed inside the first bracket 21 and is perpendicularly disposed on the outer surface of the flange plate 112 of the first steel column. The second sleeve 222 is disposed on the outer surface of the flange plate 212 of the first bracket and is perpendicular to the outer surface of the flange plate 212 of the first bracket.

[0062] The second bracket device 3 includes a second bracket 31 and a second sleeve assembly 32. The second sleeve assembly 32 includes a third sleeve 321 and a fourth sleeve 322. The third sleeve 321 is disposed outside the second bracket 31 and is perpendicularly disposed on the outer surface of the flange plate 122 of the second steel column. The fourth sleeve 322 is disposed on the outer surface of the flange plate 312 of the second bracket and is perpendicular to the outer surface of the flange plate 312 of the second bracket.

[0063] The gluten 41 includes a first gluten 411 and a second gluten 412. One end of the second gluten 412 is mechanically connected to the first sleeve 221, and the other end is welded to the outer surface of the flange plate 312 of the second bracket. One end of the first gluten 421 is mechanically connected to the third sleeve 321, and the other end is welded to the outer surface of the flange plate 212 of the first bracket.

[0064] The bottom rib 42 includes a first bottom rib 421 and a second bottom rib 422. One end of the second bottom rib 422 is mechanically connected to the first sleeve 221, and the other end is welded to the outer surface of the flange plate 312 of the second bracket. One end of the first bottom rib 421 is mechanically connected to the third sleeve 321, and the other end is welded to the outer surface of the flange plate 212 of the first bracket.

[0065] The above connection method ensures the connection quality between the reinforcing bars and the steel column; in addition, a second stirrup is provided on the outside of the top reinforcement 41 and the bottom reinforcement 42 for reinforcement. The structure formed by the combination of the top reinforcement 41, the bottom reinforcement 42 and the second stirrup forms a reinforced concrete beam by pouring concrete, and has a certain protective layer thickness.

[0066] In one embodiment, the second sleeve 222 is mechanically connected to one end of the second vertical reinforcing bar 52, and the fourth sleeve 322 is mechanically connected to one end of the second vertical reinforcing bar 52.

[0067] In one embodiment, the first sleeve 221, the second sleeve 222, the third sleeve 321, and the fourth sleeve 322 are provided with internal threads. The main purpose of the threads is to enhance the connection and fixation capability between the sleeves and the reinforcing bars.

[0068] In one embodiment, there are a plurality of first sleeves 221, second sleeves 222, third sleeves 321, and fourth sleeves 322. In this embodiment, there are sixteen first sleeves 221, eight of which are located at the top of the inside of the first bracket 21 and eight of which are located at the bottom of the inside of the first bracket 21; there are twelve second sleeves 222, six of which are located on the upper flange of the first bracket 21 and six of which are located on the lower flange of the first bracket 21; there are sixteen third sleeves 321, eight of which are located on the second steel column 12 and on the upper outer side of the second bracket 31, and eight of which are located on the second steel column 12 and on the lower outer side of the second bracket 31; there are twelve fourth sleeves 322, six of which are located on the upper flange of the second bracket 31 and six of which are located on the lower flange of the second bracket 31.

[0069] In one embodiment, the web 211 of the first corbel is vertically connected to the web 111 of the first steel column, and the web 311 of the second corbel is vertically connected to the web 121 of the second steel column. The main advantage of this is that it allows for better force transmission in the structure and reduces the likelihood of shear failure.

[0070] In one embodiment, the width B1 of the first corbel is the same as the flange width b1 of the first steel column; the length of the first corbel must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the first corbel is determined by the following formula:

[0071] H1 = H - h1 - h2 - d1 - d2

[0072] In the formula, H1 is the height of the first corbel, H is the height of the reinforced concrete beam, h1 is the thickness of the protective layer of the first top reinforcement, h2 is the thickness of the protective layer of the first bottom reinforcement, d1 is the diameter of the first top reinforcement, and d2 is the diameter of the first bottom reinforcement.

[0073] The width B2 of the second bracket is the same as the flange width b2 of the second steel column; the length of the first bracket must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the second bracket is determined by the following formula:

[0074] H2=H-h3-h4-d3-d4

[0075] In the formula, H2 is the height of the second corbel, H is the height of the reinforced concrete beam, h3 is the thickness of the protective layer of the second top reinforcement, h4 is the thickness of the protective layer of the second bottom reinforcement, d3 is the diameter of the second top reinforcement, and d4 is the diameter of the second bottom reinforcement.

[0076] In one embodiment, the first steel column 11 has a first stiffening rib 61 horizontally positioned at the corresponding horizontal position of the flange plate 212 of the first corbel; the second steel column 12 has a second stiffening rib 62 horizontally positioned at the corresponding horizontal position of the flange plate 312 of the second corbel. The advantage of this is that it provides local structural reinforcement to the connection between the steel column and the corbel, preventing deformation and instability of the steel column structure, while also improving force transmission and enhancing the stiffness and stability of the beam-column joint.

[0077] In one embodiment, a plurality of the first stiffening ribs and the second stiffening ribs are provided. In this embodiment, four of the first stiffening ribs and four of the second stiffening ribs are provided.

[0078] In one embodiment, the first corbel 21 is provided with a first stiffening strip 71, which is in the same vertical direction as the second sleeve 222; the second corbel 31 is provided with a second stiffening strip 72, which is in the same vertical direction as the fourth sleeve 322. The advantage of this is that it locally strengthens the corbel, allowing the second vertical reinforcement to better transmit force vertically, preventing the corbel from being damaged by excessive vertical loads due to the structure formed by the second vertical reinforcement. This helps prevent deformation and instability of the corbel. From an overall perspective, it also facilitates vertical force transmission in the steel-concrete composite column constructed from the steel column and the vertical reinforcement.

[0079] In one embodiment, there are several first stiffening strips 71 and several second stiffening strips 72. In this embodiment, there are two first stiffening strips, located on both sides of the first leg web; and two second stiffening ribs, located on both sides of the second leg web.

[0080] A construction method for a corbel sleeve composite steel-concrete beam-column joint structure, the construction method including the following steps:

[0081] S1. Determine the width, length, and height of the first corbel 21. Specifically, the width of the flange plate of the steel column is the same as the width of the corbel. The width B1 of the first corbel can be determined based on the width b1 of the flange plate of the first steel column. The height H1 of the first corbel is calculated and determined according to the formula in this scheme based on the height H of the reinforced concrete beam, the protective layer thickness h1 of the first top reinforcement, the protective layer thickness h2 of the first bottom reinforcement, the diameter d1 of the first top reinforcement, and the diameter d2 of the first bottom reinforcement. The welding length to the first corbel 21 is determined based on the diameters of the top reinforcement 41 and the bottom reinforcement 42, and the length of the first corbel 21 is further determined.

[0082] The width, length, and height of the second corbel 31 are determined. Specifically, the width of the flange plate of the steel column is the same as the width of the corbel. The width B2 of the second corbel is determined based on the width b2 of the flange plate of the second steel column. The height H2 of the second corbel is calculated and determined according to the formula in this scheme based on the height H of the reinforced concrete, the thickness h3 of the protective layer of the second top reinforcement, the thickness h4 of the protective layer of the second bottom reinforcement, the diameter d3 of the second top reinforcement, and the diameter d4 of the second bottom reinforcement. The welding length to the second corbel 31 is determined based on the diameters of the top reinforcement 41 and the bottom reinforcement 42, and the length of the second corbel 31 is further determined.

[0083] Determine the quantity and position of the first sleeve 221 and the second sleeve 222;

[0084] Determine the quantity and position of the third sleeve 321 and the fourth sleeve 322;

[0085] The first brace 21 is provided with a first stiffening strip 71, and the second brace 31 is provided with a second stiffening strip 72, and the position and number of the first stiffening strip 71 and the second stiffening strip 72 are determined.

[0086] S2. Perform factory prefabrication of the first type of steel column 11 and the second type of steel column 12;

[0087] The first bracket 21 is connected to the flange plate 112 of the first steel column, and the second bracket 31 is connected to the flange plate 122 of the second steel column.

[0088] The first sleeve 221, the second sleeve 222, the third sleeve 321, and the fourth sleeve 322 are installed; the installation method is welding.

[0089] Install the first stiffening strip 71 and the second stiffening strip 72;

[0090] The first steel column 11 is provided with a first stiffening rib 61, and the first stiffening rib 61 is installed.

[0091] The second type of steel column 12 is provided with a second stiffening rib 62, and the second stiffening rib 62 is installed.

[0092] S3. Transport the first steel column 11 and the second steel column 12, which have been prefabricated in steps S1 and S2, to the construction site. After positioning and installing the first steel column 11 and the second steel column 12 using hoisting equipment, install the vertical reinforcing bars 5 according to the design requirements. Connect and install the second vertical reinforcing bars 52 on the second sleeve 222 and connect the second vertical reinforcing bars 52 on the fourth sleeve 322.

[0093] Install the second gluten 412 first, then install the first gluten 411;

[0094] First install the second bottom reinforcement bar 422, then install the first bottom reinforcement bar 421.

[0095] S4. After all the vertical reinforcing bars 5 of the first steel column 11 and the second steel column 12 are tied, and all the top reinforcing bars 41 and bottom reinforcing bars 42 of the reinforced concrete beam 4 are tied, concrete is poured to form a corbel sleeve combined steel-concrete beam-column joint structure.

[0096] This invention optimizes the node structure, ensuring high reliability, reducing construction difficulty, and shortening the construction cycle while guaranteeing construction quality.

[0097] Other aspects of the corbel sleeve combined steel-concrete beam-column joint structure described in this invention are available in the prior art and will not be repeated here.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A corbel sleeve combined steel-concrete beam-column joint structure, characterized in that, The system includes steel columns and reinforced concrete beams. The steel columns include a first steel column and a second steel column. The first steel column is equipped with a first corbel device, and the second steel column is equipped with a second corbel device. The reinforced concrete beams include top reinforcement and bottom reinforcement, which are connected to the steel columns via the first and second corbel devices. Both the first and second steel columns have vertical reinforcement bars on their outer periphery. The vertical reinforcement bars include a first vertical reinforcement bar and a second vertical reinforcement bar, which are connected to the first and second corbel devices. The first bracket device includes a first bracket and a first sleeve assembly. The first sleeve assembly includes a first sleeve and a second sleeve. The first sleeve is disposed inside the first bracket and is perpendicularly disposed on the outer surface of the flange plate of the first steel column. The second sleeve is disposed on the outer surface of the flange plate of the first bracket and is perpendicular to the outer surface of the flange plate of the first bracket. The second bracket device includes a second bracket and a second sleeve assembly. The second sleeve assembly includes a third sleeve and a fourth sleeve. The third sleeve is disposed outside the second bracket and is perpendicular to the outer surface of the flange plate of the second steel column. The fourth sleeve is disposed on the outer surface of the flange plate of the second bracket and is perpendicular to the outer surface of the flange plate of the second bracket. The gluten includes a first gluten and a second gluten. One end of the second gluten is connected to the first sleeve, and the other end is connected to the outer surface of the flange plate of the second bracket. One end of the first gluten is connected to the third sleeve, and the other end is connected to the outer surface of the flange plate of the first bracket. The bottom reinforcement includes a first bottom reinforcement and a second bottom reinforcement. One end of the second bottom reinforcement is connected to the first sleeve, and the other end is connected to the outer surface of the flange plate of the second corbel. One end of the first bottom reinforcement is connected to the third sleeve, and the other end is connected to the outer surface of the flange plate of the first corbel.

2. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The second sleeve is connected to one end of the second vertical reinforcing bar, and the fourth sleeve is connected to one end of the second vertical reinforcing bar.

3. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The first sleeve, the second sleeve, the third sleeve, and the fourth sleeve are threaded inside.

4. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The first sleeve, the second sleeve, the third sleeve, and the fourth sleeve are each provided in several units.

5. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The web of the first corbel is vertically connected to the web of the first steel column, and the web of the second corbel is vertically connected to the web of the second steel column.

6. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The width of the first bracket is the same as the width of the flange plate of the first steel column; the length of the first bracket must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the first bracket is determined by the following formula: H1 = H - h1 - h2 - d1 - d2 In the formula, H1 is the height of the first corbel, H is the height of the reinforced concrete beam, h1 is the thickness of the protective layer of the first top reinforcement, h2 is the thickness of the protective layer of the first bottom reinforcement, d1 is the diameter of the first top reinforcement, and d2 is the diameter of the first bottom reinforcement. The width of the second bracket is the same as the width of the flange of the second steel column; the length of the first bracket must ensure that the top reinforcement and the bottom reinforcement have sufficient welding length; the height of the second bracket is determined by the following formula: H2=H-h3-h4-d3-d4 In the formula, H2 is the height of the second corbel, H is the height of the reinforced concrete beam, h3 is the thickness of the protective layer of the second top reinforcement, h4 is the thickness of the protective layer of the second bottom reinforcement, d3 is the diameter of the second top reinforcement, and d4 is the diameter of the second bottom reinforcement.

7. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The first steel column has a first stiffening rib horizontally provided at the horizontal position corresponding to the flange plate of the first corbel; the second steel column has a second stiffening rib horizontally provided at the horizontal position corresponding to the flange plate of the second corbel.

8. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 1, characterized in that, The first brace is provided with a first stiffening strip, which is in the same vertical position as the second sleeve; the second brace is provided with a second stiffening strip, which is in the same vertical position as the fourth sleeve.

9. The corbel sleeve combined steel-concrete beam-column joint structure according to claim 8, characterized in that, The first stiffening bar has several parts; the second stiffening bar has several parts.

10. A construction method for a corbel sleeve composite steel-concrete beam-column joint structure according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Determine the width, length, and height of the first cow leg; Determine the width, length, and height of the second cow leg; Determine the quantity and position of the first sleeve and the second sleeve; Determine the quantity and position of the third and fourth sleeves; The first leg is provided with a first stiffening strip, and the second leg is provided with a second stiffening strip. The positions and quantities of the first stiffening strip and the second stiffening strip are determined. S2. Perform factory prefabrication of the first type of steel column and the second type of steel column; Connect the first bracket to the flange plate of the first steel column, and connect the second bracket to the flange plate of the second steel column; Install the first sleeve, the second sleeve, the third sleeve, and the fourth sleeve; Install the first stiffening strip and the second stiffening strip; The first type of steel column is provided with a first stiffening rib, and the first stiffening rib is installed; The second type of steel column is provided with a second stiffening rib, and the second stiffening rib is installed; S3. Transport the first and second steel columns, which have been prefabricated in steps S1 and S2, to the construction site. After positioning and installing the first and second steel columns using hoisting equipment, install the vertical reinforcing bars according to the design requirements. Connect the second vertical reinforcing bars to the second sleeve and to the fourth sleeve. Install the second rib first, then install the first rib; Install the second bottom reinforcement bar first, then install the first bottom reinforcement bar; S4. After all the vertical reinforcement bars of the first and second steel columns are tied, and all the top and bottom reinforcement bars of the reinforced concrete beam are tied, concrete is poured to form a corbel sleeve combined steel-concrete beam-column joint structure.

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