Steel bar connecting structure for stiff column and beam joint

Abstract

The utility model relates to the technical field of building construction, in particular to a steel bar connecting structure for a stiff column and a beam joint, which comprises a section steel column. An upper row of transverse steel bars, an upper row of transverse steel bars, an upper row of transverse steel bars, a lower row of transverse steel bars, a lower row of transverse steel bars and a lower row of transverse steel bars are sequentially arranged on the outer sides of two flange plates of the section steel column from top to bottom; a first upper row of longitudinal steel bars, a second upper row of longitudinal steel bars, a second lower row of longitudinal steel bars and a first lower row of longitudinal steel bars are sequentially arranged on the front side and the rear side of a web of the section steel column from top to bottom, and a first upper row of transverse lap welding plates, a second upper row of transverse lap welding plates, a second lower row of transverse lap welding plates and a first lower row of transverse lap welding plates are horizontally fixed to the outer surface of each flange plate of the section steel column. The bottom ends of the upper row of transverse steel bars are fixedly welded to the upper surfaces of the upper row of transverse lap welding plates. The problems that according to an existing steel bar connecting mode of a stiff column and a beam joint, the overall strength of a column body is easily weakened or the durability of the structure is reduced, and time and labor are consumed, so that the construction efficiency is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a steel bar connection structure used for a rigid column and a beam node. Background Art

[0002] With the development of modern construction engineering technology, rigid concrete structures have been widely used in high-rise buildings and large-span structures due to their advantages such as high strength, small cross-sectional size, excellent bond strength and material saving. The core of rigid concrete structure lies in its unique construction method, that is, steel is embedded in the concrete to form a composite material system. This structure can not only effectively improve the bearing capacity and seismic performance of the building, but also significantly increase the usable space and reduce the overall project cost. However, in the actual construction process, especially in the beam-column node area, the presence of steel columns makes the reinforcement engineering extremely complicated. The beam-column node is not only the key part of the structure to bear force, but also an important hub for connecting force flows in multiple directions.

[0003] At present, on the construction site, the existing steel bar connection methods of rigid columns and beam nodes mainly rely on two methods: welding sleeve connection and perforation connection. However, there are the following problems in specific practice: First, when the number of steel bars is large, the perforation connection requires large-scale drilling of holes on the steel column, which not only weakens the overall strength of the column, but also may lead to a decrease in the durability of the structure; second, the sleeve connection has extremely high requirements for positioning accuracy. Once the sleeve angle or thread size in the early design deviates, it will make it impossible to adjust on site. Therefore, it is necessary to accurately calculate the position of each connection point in the design and prefabrication stages. When the number of steel bars is large, this process is particularly time-consuming and labor-intensive, reducing construction efficiency.

[0004] Therefore, it is necessary to invent a steel bar connection structure for rigid columns and beam nodes to solve the above problems. Utility Model Content

[0005] In order to solve the problems that the existing steel bar connection method for the joints of rigid columns and beams is easy to weaken the overall strength of the column or cause the durability of the structure to decrease, and the construction efficiency is low due to time-consuming and labor-intensive construction, the utility model provides a steel bar connection structure for the joints of rigid columns and beams.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] A steel bar connection structure for a rigid column and beam joint, including a steel section column. On the outer sides of the two flange plates of the steel section column, there are successively arranged from top to bottom the upper first row of horizontal steel bars, the upper second row of horizontal steel bars, the upper third row of horizontal steel bars, the lower third row of horizontal steel bars, the lower second row of horizontal steel bars, and the lower first row of horizontal steel bars. On the front and rear sides of the web of the steel section column, there are successively arranged from top to bottom the upper first row of vertical steel bars, the upper second row of vertical steel bars, the lower second row of vertical steel bars, and the lower first row of vertical steel bars. On the outer surface of each flange plate of the steel section column, there are horizontally fixed the upper first row of horizontal welding plates, the upper second row of horizontal welding plates, the lower second row of horizontal welding plates, and the lower first row of horizontal welding plates. And the bottom end of the upper first row of horizontal steel bars is welded and fixed to the upper surface of the upper first row of horizontal welding plates, the bottom end of the upper second row of horizontal steel bars is welded and fixed to the upper surface of the upper second row of horizontal welding plates, the bottom end of the lower second row of horizontal steel bars is welded and fixed to the upper surface of the lower second row of horizontal welding plates, and the bottom end of the lower first row of horizontal steel bars is welded and fixed to the upper surface of the lower first row of horizontal welding plates;

[0008] On the outer surface of each flange plate of the steel section column, there are fixed the upper third row of sleeves at the same height as the upper third row of horizontal steel bars and the lower third row of sleeves at the same height as the lower third row of horizontal steel bars. And the end of the upper third row of horizontal steel bars is inserted into the upper third row of sleeves, and the end of the lower third row of horizontal steel bars is inserted into the lower third row of sleeves;

[0009] On the web of the steel section column, there are opened the upper first row of through holes at the same height as the upper first row of vertical steel bars, the upper second row of through holes at the same height as the upper second row of vertical steel bars, the lower second row of through holes at the same height as the lower second row of vertical steel bars, and the lower first row of through holes at the same height as the lower first row of vertical steel bars. And the upper first row of vertical steel bars is inserted into the upper first row of through holes, the upper second row of vertical steel bars is inserted into the upper second row of through holes, the lower second row of vertical steel bars is inserted into the lower second row of through holes, and the lower first row of vertical steel bars is inserted into the lower first row of through holes.

[0010] Further, the upper first row of horizontal welding plates, the upper second row of horizontal welding plates, the lower second row of horizontal welding plates, and the lower first row of horizontal welding plates are all rectangular, and their widths are all equal to the width of the flange plate of the steel section column.

[0011] Further, the length of the upper second row of horizontal welding plates is greater than the length of the upper first row of horizontal welding plates, and the length of the lower first row of horizontal welding plates is greater than the length of the lower second row of horizontal welding plates.

[0012] Further, on the front and rear surfaces of the web of the steel section column, there are horizontally arranged the upper first row of non-perforated vertical steel bars, the upper second row of non-perforated vertical steel bars, the lower first row of non-perforated vertical steel bars, and the lower second row of non-perforated vertical steel bars. And the upper first row of non-perforated vertical steel bars is arranged staggeredly at the same height as the upper first row of vertical steel bars, the upper second row of non-perforated vertical steel bars is arranged staggeredly at the same height as the upper second row of vertical steel bars, the lower first row of non-perforated vertical steel bars is arranged staggeredly at the same height as the lower first row of vertical steel bars, and the lower second row of non-perforated vertical steel bars is arranged staggeredly at the same height as the lower second row of vertical steel bars.

[0013] Furthermore, upper row longitudinal welding plates, upper second row longitudinal welding plates, lower row longitudinal welding plates, and lower second row longitudinal welding plates are horizontally fixed to both the front surface and the rear surface of the web of the profiled steel column. The bottom ends of the upper row unperforated longitudinal steel bars are fixedly welded to the upper surfaces of the upper row longitudinal welding plates, the bottom ends of the upper second row unperforated longitudinal steel bars are fixedly welded to the upper surfaces of the upper second row longitudinal welding plates, the bottom ends of the lower row unperforated longitudinal steel bars are fixedly welded to the upper surfaces of the lower row longitudinal welding plates, and the bottom ends of the lower second row unperforated longitudinal steel bars are fixedly welded to the upper surfaces of the lower second row longitudinal welding plates.

[0014] Furthermore, the lengths of the upper row transverse welding plates and the lower second row transverse welding plates are both 200 mm; the lengths of the upper second row transverse welding plates and the lower row transverse welding plates are both 320 mm.

[0015] Furthermore, between the upper row transverse steel bars and the upper row transverse welding plates, between the upper second row transverse steel bars and the upper second row transverse welding plates, between the lower row transverse steel bars and the lower row transverse welding plates, between the lower second row transverse steel bars and the lower second row transverse welding plates, between the upper row unperforated longitudinal steel bars and the upper row longitudinal welding plates, between the upper second row unperforated longitudinal steel bars and the upper surfaces of the upper second row longitudinal welding plates, between the lower row unperforated longitudinal steel bars and the lower row longitudinal welding plates, and between the lower second row unperforated longitudinal steel bars and the lower second row longitudinal welding plates, double-sided welding fixation is adopted.

[0016] The structure of the present utility model is reasonably and reliably designed. By adopting the combination of welding plates and sleeves, the connection of steel bars in both the transverse and longitudinal directions is optimized, the problem that the large-area perforated connection weakens the strength of the column body is solved, the structural durability of the joint area between the stiffened column and the beam is improved, and at the same time, the cumbersome procedures caused by excessive sleeve connections are avoided, effectively improving the construction efficiency. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model.

[0018] Figure 2 is along Figure 1 the sectional view taken along line A-A in

[0019] Figure 3 is along Figure 1 the sectional view taken along line B-B in

[0020] Figure 4 is along Figure 1 the sectional view taken along line C-C in

[0021] In the figure: 1. flange plate; 2. upper row of horizontal steel bars; 3. upper second row of horizontal steel bars; 4. upper third row of horizontal steel bars; 5. lower third row of horizontal steel bars; 6. lower second row of horizontal steel bars; 7. lower first row of horizontal steel bars; 8. web; 9. upper first row of longitudinal steel bars; 10. upper second row of longitudinal steel bars; 13. upper first row of transverse welding plates; 14. upper second row of transverse welding plates; 15. lower second row of transverse welding plates; 16. lower first row of transverse welding plates; 17. upper third row of sleeves; 18. lower third row of sleeves; 19. upper first row of through holes; 20. upper second row of through holes; 21. lower second row of through holes; 22. lower first row of through holes; 23. upper first row of unperforated longitudinal steel bars; 24. upper second row of unperforated longitudinal steel bars; 25. lower first row of unperforated longitudinal steel bars; 26. lower second row of unperforated longitudinal steel bars; 27. upper first row of longitudinal welding plates; 28. upper second row of longitudinal welding plates; 29. lower first row of longitudinal welding plates; 30. lower second row of longitudinal welding plates. Specific implementation manner

[0022] A steel bar connection structure for a rigid column and beam joint, as shown in Attachment Figure 1 ~ Attachment Figure 4 shown, includes a steel section column. On the outer sides of the two flange plates 1 of the steel section column, there are successively arranged from top to bottom the upper first row of horizontal steel bars 2, the upper second row of horizontal steel bars 3, the upper third row of horizontal steel bars 4, the lower third row of horizontal steel bars 5, the lower second row of horizontal steel bars 6, and the lower first row of horizontal steel bars 7. On the front and back sides of the web 8 of the steel section column, there are successively arranged from top to bottom the upper first row of longitudinal steel bars 9, the upper second row of longitudinal steel bars 10, the lower second row of longitudinal steel bars, and the lower first row of longitudinal steel bars. On the outer surface of each flange plate 1 of the steel section column, there are horizontally fixed the upper first row of transverse welding plates 13, the upper second row of transverse welding plates 14, the lower second row of transverse welding plates 15, and the lower first row of transverse welding plates 16. And the bottom end of the upper first row of horizontal steel bars 2 is welded and fixed to the upper surface of the upper first row of transverse welding plates 13, the bottom end of the upper second row of horizontal steel bars 3 is welded and fixed to the upper surface of the upper second row of transverse welding plates 14, the bottom end of the lower second row of horizontal steel bars 6 is welded and fixed to the upper surface of the lower second row of transverse welding plates 15, and the bottom end of the lower first row of horizontal steel bars 7 is welded and fixed to the upper surface of the lower first row of transverse welding plates 16;

[0023] On the outer surface of each flange plate 1 of the steel section column, there are fixed the upper third row of sleeves 17 at the same height as the upper third row of horizontal steel bars 4 and the lower third row of sleeves 18 at the same height as the lower third row of horizontal steel bars 5. And the end of the upper third row of horizontal steel bars 4 is inserted into the upper third row of sleeves 17, and the end of the lower third row of horizontal steel bars 5 is inserted into the lower third row of sleeves 18;

[0024] On the web plate 8 of the steel section column, there are upper row through holes 19 at the same height as the upper row of longitudinal steel bars 9, upper second row through holes 20 at the same height as the upper second row of longitudinal steel bars 10, lower second row through holes 21 at the same height as the lower second row of longitudinal steel bars, and lower row through holes 22 at the same height as the lower row of longitudinal steel bars. The upper row of longitudinal steel bars 9 is inserted into the upper row through holes 19, the upper second row of longitudinal steel bars 10 is inserted into the upper second row through holes 20, the lower second row of longitudinal steel bars is inserted into the lower second row through holes 21, and the lower row of longitudinal steel bars is inserted into the lower row through holes 22.

[0025] In the present utility model, the steel bars of the rigid column and beam joints are connected by the combination of the welding plate and the sleeve, ensuring the stability of the steel bars in the joint area. Specifically, the upper row of horizontal steel bars 2 is welded and fixed to the upper row of horizontal welding plates 13, the upper second row of horizontal steel bars 3 is welded and fixed to the upper second row of horizontal welding plates 14, the lower second row of horizontal steel bars 6 is welded and fixed to the lower second row of horizontal welding plates 15, and the lower row of horizontal steel bars 7 is welded and fixed to the lower row of horizontal welding plates 16. The ends of the upper third row of horizontal steel bars 4 are inserted into the upper third row of sleeves 17, and the ends of the lower third row of horizontal steel bars 5 are inserted into the lower third row of sleeves 18 to achieve the connection. At the same time, the upper row of longitudinal steel bars 9, the upper second row of longitudinal steel bars 10, the lower second row of longitudinal steel bars, and the lower row of longitudinal steel bars are connected to the web plate 8 of the steel section column by perforation. By optimizing the connection of the steel bars in the horizontal and vertical directions, the problem that the large-area perforation connection weakens the strength of the column body is solved, the structural durability of the rigid column and beam joint area is improved, and at the same time, the cumbersome procedures caused by excessive sleeve connections are avoided, effectively improving the construction efficiency.

[0026] The upper row of horizontal welding plates 13, the upper second row of horizontal welding plates 14, the lower second row of horizontal welding plates 15, and the lower row of horizontal welding plates 16 are all rectangular, and their widths are all equal to the width of the flange plate 1 of the steel section column.

[0027] The length of the upper second row of horizontal welding plates 14 is greater than the length of the upper row of horizontal welding plates 13, and the length of the lower row of horizontal welding plates 16 is greater than the length of the lower second row of horizontal welding plates 15.

[0028] The upper row of horizontal steel bars 2, the upper second row of horizontal steel bars 3, and the upper third row of horizontal steel bars 4 mainly bear tension and shear forces. Especially, the upper second row of horizontal steel bars 3 needs to bear a large load. Therefore, the greater length of the upper second row of horizontal welding plates 14 than the upper row of horizontal welding plates 13 can provide better connection strength. The lower third row of horizontal steel bars 5, the lower second row of horizontal steel bars 6, and the lower row of horizontal steel bars 7 mainly bear pressure and shear forces. Especially, the lower row of horizontal steel bars 7 is in a key load-bearing position. Therefore, the greater length of the lower row of horizontal welding plates 16 than the lower second row of horizontal welding plates 15 can ensure the stability of the connection.

[0029] On the front and rear surfaces of the web 8 of the steel column, there are arranged horizontally the upper row of unperforated longitudinal steel bars 23, the upper second row of unperforated longitudinal steel bars 24, the lower row of unperforated longitudinal steel bars 25, and the lower second row of unperforated longitudinal steel bars 26. And the upper row of unperforated longitudinal steel bars 23 is arranged staggeredly at the same height as the upper row of longitudinal steel bars 9, the upper second row of unperforated longitudinal steel bars 24 is arranged staggeredly at the same height as the upper second row of longitudinal steel bars 10, the lower row of unperforated longitudinal steel bars 25 is arranged staggeredly at the same height as the lower row of longitudinal steel bars, and the lower second row of unperforated longitudinal steel bars 26 is arranged staggeredly at the same height as the lower second row of longitudinal steel bars.

[0030] On the front and rear surfaces of the web 8 of the steel column, there are horizontally fixed the upper row of longitudinal welding plates 27, the upper second row of longitudinal welding plates 28, the lower row of longitudinal welding plates 29, and the lower second row of longitudinal welding plates 30. And the bottom ends of the upper row of unperforated longitudinal steel bars 23 are welded and fixed to the upper surfaces of the upper row of longitudinal welding plates 27, the bottom ends of the upper second row of unperforated longitudinal steel bars 24 are welded and fixed to the upper surfaces of the upper second row of longitudinal welding plates 28, the bottom ends of the lower row of unperforated longitudinal steel bars 25 are welded and fixed to the upper surfaces of the lower row of longitudinal welding plates 29, and the bottom ends of the lower second row of unperforated longitudinal steel bars 26 are welded and fixed to the upper surfaces of the lower second row of longitudinal welding plates 30.

[0031] By arranging the unperforated longitudinal steel bars and the perforated longitudinal steel bars staggeredly at the same height, a large number of continuous perforations on the web 8 of the steel column can be avoided, thereby reducing the local weakening of the web 8 of the steel column, further enhancing the overall structural strength of the joint area between the stiffening column and the beam, and improving its durability and service life; at the same time, the staggered arrangement can disperse the stress more evenly and avoid stress concentration, especially in the joint area, which is crucial for improving the safety and reliability of the structure.

[0032] The lengths of the upper row of transverse welding plates 13 and the lower second row of transverse welding plates 15 are both 200 mm; the lengths of the upper second row of transverse welding plates 14 and the lower row of transverse welding plates 16 are both 320 mm.

[0033] Between the upper row of transverse steel bars 2 and the upper row of transverse welding plates 13, between the upper second row of transverse steel bars 3 and the upper second row of transverse welding plates 14, between the lower row of transverse steel bars 7 and the lower row of transverse welding plates 16, between the lower second row of transverse steel bars 6 and the lower second row of transverse welding plates 15, between the upper row of unperforated longitudinal steel bars 23 and the upper row of longitudinal welding plates 27, between the upper second row of unperforated longitudinal steel bars 24 and the upper surfaces of the upper second row of longitudinal welding plates 28, between the lower row of unperforated longitudinal steel bars 25 and the lower row of longitudinal welding plates 29, and between the lower second row of unperforated longitudinal steel bars 26 and the lower second row of longitudinal welding plates 30, double-sided welding is used for fixing.

[0034] Double-sided welding provides a larger weld area, thereby enhancing the bearing capacity of the welded part. At the same time, it can disperse the stress more evenly, reduce stress concentration, improve the durability and service life of the welded part, and thus improve the overall welding quality.

[0035] The present utility model is implemented in the following steps during construction:

[0036] Step 1: According to the design drawings and BIM technology, conduct detailed steel bar arrangement design and optimization for the joint area of the rigid column and beam to ensure reasonable steel bar arrangement, reduce conflicts, and prepare the required upper row of horizontal steel bars 2, upper second row of horizontal steel bars 3, upper third row of horizontal steel bars 4, lower third row of horizontal steel bars 5, lower second row of horizontal steel bars 6, lower first row of horizontal steel bars 7, upper first row of longitudinal steel bars 9, upper second row of longitudinal steel bars 10, lower second row of longitudinal steel bars, lower first row of longitudinal steel bars, upper first row of horizontal welding plates 13, upper second row of horizontal welding plates 14, lower second row of horizontal welding plates 15, lower first row of horizontal welding plates 16, upper first row of longitudinal welding plates 27, upper second row of longitudinal welding plates 28, lower first row of longitudinal welding plates 29, lower second row of longitudinal welding plates 30, upper third row of sleeves 17, and lower third row of sleeves 18 after the hoisting of the profiled steel column is completed, and ensure that the materials meet the design standards; among them, the upper first row of horizontal welding plates 13, upper second row of horizontal welding plates 14, lower second row of horizontal welding plates 15, and lower first row of horizontal welding plates 16 are all rectangular, and their widths are all equal to the width of the flange plate 1 of the profiled steel column. The lengths of the upper first row of horizontal welding plates 13 and lower second row of horizontal welding plates 15 are both 200 mm, and the lengths of the upper second row of horizontal welding plates 14 and lower first row of horizontal welding plates 16 are both 320 mm; the upper first row of longitudinal welding plates 27, upper second row of longitudinal welding plates 28, lower first row of longitudinal welding plates 29, and lower second row of longitudinal welding plates 30 are all rectangular, and their widths are all equal to the width of the web 8 of the profiled steel column.

[0037] Step 2: Conduct precision mechanical drilling on the web 8 of the profiled steel column, and successively open the upper first row of through holes 19, upper second row of through holes 20, lower second row of through holes 21, and lower first row of through holes 22 according to the design positions, and ensure that the distance from the edge of each through hole to the edge of the profiled steel is not less than 30 mm. Moreover, when the total area of each through hole exceeds 25% of the area of the web 8, a reinforcing plate needs to be added.

[0038] Step 3: Determine the positions of the upper first row of horizontal welding plates 13, upper second row of horizontal welding plates 14, lower second row of horizontal welding plates 15, and lower first row of horizontal welding plates 16 according to the design drawings and weld them on the flange plate 1 of the profiled steel column. At the same time, determine the positions of the upper first row of longitudinal welding plates 27, upper second row of longitudinal welding plates 28, lower first row of longitudinal welding plates 29, and lower second row of longitudinal welding plates 30 according to the design drawings and weld them on the web 8 of the profiled steel column to ensure that the welding quality meets the requirements; determine the positions of the upper third row of sleeves 17 and lower third row of sleeves 18 according to the design drawings and weld them on the flange plate 1 of the profiled steel column using gas protection. In order to ensure the position accuracy of the upper third row of sleeves 17 and lower third row of sleeves 18, it is necessary to lay out and draw the reference axis and the side lines of the upper third row of sleeves 17 and lower third row of sleeves 18 in advance, and perform spot welding connection after positioning. And it can only be constructed in the next step after being inspected and qualified by the inspector and marked with a qualified sign.

[0039] Step 4: Perform double-sided welding and fixation on the upper row of horizontal steel bars 2, the upper second row of horizontal steel bars 3, the lower second row of horizontal steel bars 6, and the lower row of horizontal steel bars 7 with the corresponding upper row of horizontal welding plates 13, the upper second row of horizontal welding plates 14, the lower second row of horizontal welding plates 15, and the lower row of horizontal welding plates 16 respectively; insert the ends of the upper third row of horizontal steel bars 4 and the lower third row of horizontal steel bars 5 into the corresponding upper third row of sleeves 17 and the lower third row of sleeves 18 respectively; insert the upper row of longitudinal steel bars 9, the upper second row of longitudinal steel bars 10, the lower second row of longitudinal steel bars, and the lower row of longitudinal steel bars into the corresponding upper row of through holes 19, the upper second row of through holes 20, the lower second row of through holes 21, and the lower row of through holes 22 respectively; perform double-sided welding and fixation on the upper row of unperforated longitudinal steel bars 23, the upper second row of unperforated longitudinal steel bars 24, the lower row of unperforated longitudinal steel bars 25, and the lower second row of unperforated longitudinal steel bars 26 with the corresponding upper row of longitudinal welding plates 27, the upper second row of longitudinal welding plates 28, the lower row of longitudinal welding plates 29, and the lower second row of longitudinal welding plates 30 respectively, and the longitudinal steel bars and the unperforated longitudinal steel bars in the same row are arranged alternately, thus completing the construction of this steel bar connection structure; overcoming the problems existing in the existing steel bar connection method of the rigid frame column and beam joint, such as being prone to weakening the overall strength of the column body or causing a decline in the durability of the structure, and being time-consuming and laborious resulting in low construction efficiency.

[0040] During the specific implementation process, when optimizing the detailed steel bar arrangement in the rigid frame column and beam joint area, the small-diameter steel bars can be replaced with equal cross-sections, the spacing of the steel bar arrangement can be increased, and the number of steel bars in the beam can be gradually reduced to achieve the good effect of further reducing the number of steel bars passing through the profiled steel column.

[0041] In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar connection structure for a rigid column and beam joint, including a steel column. On the outer sides of the two flange plates (1) of the steel column, there are successively arranged from top to bottom an upper row of horizontal steel bars (2), an upper second row of horizontal steel bars (3), an upper third row of horizontal steel bars (4), a lower third row of horizontal steel bars (5), a lower second row of horizontal steel bars (6), and a lower first row of horizontal steel bars (7). On the front and back sides of the web (8) of the steel column, there are successively arranged from top to bottom an upper first row of longitudinal steel bars (9), an upper second row of longitudinal steel bars (10), a lower second row of longitudinal steel bars, and a lower first row of longitudinal steel bars. It is characterized in that: On the outer surface of each flange plate (1) of the steel column, a row of upper horizontal welding plates (13), a second row of upper horizontal welding plates (14), a second row of lower horizontal welding plates (15), and a row of lower horizontal welding plates (16) are horizontally fixed. The bottom end of the upper row of horizontal steel bars (2) is fixedly welded to the upper surface of the upper row of horizontal welding plates (13), the bottom end of the second row of upper horizontal steel bars (3) is fixedly welded to the upper surface of the second row of upper horizontal welding plates (14), the bottom end of the second row of lower horizontal steel bars (6) is fixedly welded to the upper surface of the second row of lower horizontal welding plates (15), and the bottom end of the lower row of horizontal steel bars (7) is fixedly welded to the upper surface of the lower row of horizontal welding plates (16). On the outer surface of each flange plate (1) of the steel column, upper three-row sleeves (17) of the same height as the upper three-row horizontal steel bars (4) and lower three-row sleeves (18) of the same height as the lower three-row horizontal steel bars (5) are fixed. The end of the upper three-row horizontal steel bars (4) is inserted into the upper three-row sleeves (17), and the end of the lower three-row horizontal steel bars (5) is inserted into the lower three-row sleeves (18). On the web (8) of the steel column, an upper row of through holes (19) of the same height as the upper row of longitudinal steel bars (9), a second row of through holes (20) of the same height as the second row of longitudinal steel bars (10), a second row of through holes (21) of the same height as the second row of longitudinal steel bars, and a row of through holes (22) of the same height as the lower row of longitudinal steel bars are provided. The upper row of longitudinal steel bars (9) is inserted into the upper row of through holes (19), the second row of longitudinal steel bars (10) is inserted into the second row of through holes (20), the second row of longitudinal steel bars is inserted into the second row of through holes (21), and the lower row of longitudinal steel bars is inserted into the lower row of through holes (22).

2. The steel bar connection structure for the joint of the stiffened column and the beam according to claim 1, characterized in that: The upper row of horizontal welding plates (13), the second row of upper horizontal welding plates (14), the second row of lower horizontal welding plates (15), and the lower row of horizontal welding plates (16) are all rectangular, and their widths are all equal to the width of the flange plate (1) of the steel column.

3. The steel bar connection structure for the joint of the stiffened column and the beam according to claim 2, characterized in that: The length of the second row of upper horizontal welding plates (14) is greater than the length of the upper row of horizontal welding plates (13), and the length of the lower row of horizontal welding plates (16) is greater than the length of the second row of lower horizontal welding plates (15).

4. The steel bar connection structure for the joint of the stiffened column and the beam according to claim 1, characterized in that: On the front and rear surfaces of the web (8) of the steel column, an upper row of non-perforated longitudinal steel bars (23), a second row of non-perforated longitudinal steel bars (24), a lower row of non-perforated longitudinal steel bars (25), and a second row of non-perforated longitudinal steel bars (26) are horizontally arranged. The upper row of non-perforated longitudinal steel bars (23) is arranged staggered with the upper row of longitudinal steel bars (9) at the same height, the second row of non-perforated longitudinal steel bars (24) is arranged staggered with the second row of longitudinal steel bars (10) at the same height, the lower row of non-perforated longitudinal steel bars (25) is arranged staggered with the lower row of longitudinal steel bars at the same height, and the second row of non-perforated longitudinal steel bars (26) is arranged staggered with the second row of longitudinal steel bars at the same height.

5. A steel bar connection structure for a rigid column and beam joint according to claim 4, characterized in that: On the front and back surfaces of the web (8) of the profiled steel column, a row of upper longitudinal welding plates (27), a second row of upper longitudinal welding plates (28), a row of lower longitudinal welding plates (29), and a second row of lower longitudinal welding plates (30) are horizontally fixed. The bottom ends of the unperforated longitudinal steel bars (23) in the upper row are fixedly welded to the upper surfaces of the upper row of longitudinal welding plates (27), the bottom ends of the unperforated longitudinal steel bars (24) in the second row are fixedly welded to the upper surfaces of the second row of longitudinal welding plates (28), the bottom ends of the unperforated longitudinal steel bars (25) in the lower row are fixedly welded to the upper surfaces of the lower row of longitudinal welding plates (29), and the bottom ends of the unperforated longitudinal steel bars (26) in the second row are fixedly welded to the upper surfaces of the second row of longitudinal welding plates (30).

6. The steel bar connection structure for the joint of the stiffened column and the beam according to claim 3, wherein: The lengths of the upper row of transverse welding plates (13) and the second row of lower transverse welding plates (15) are both 200 mm; the lengths of the second row of upper transverse welding plates (14) and the lower row of transverse welding plates (16) are both 320 mm.

7. A steel bar connection structure for a rigid column and beam joint according to claim 5, characterized in that: Double-sided welding fixation is adopted between the upper row of transverse steel bars (2) and the upper row of transverse welding plates (13), between the second row of upper transverse steel bars (3) and the second row of upper transverse welding plates (14), between the lower row of transverse steel bars (7) and the lower row of transverse welding plates (16), between the second row of lower transverse steel bars (6) and the second row of lower transverse welding plates (15), between the upper row of unperforated longitudinal steel bars (23) and the upper row of longitudinal welding plates (27), between the second row of unperforated longitudinal steel bars (24) and the upper surfaces of the second row of longitudinal welding plates (28), between the lower row of unperforated longitudinal steel bars (25) and the lower row of longitudinal welding plates (29), and between the second row of unperforated longitudinal steel bars (26) and the second row of longitudinal welding plates (30).

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