Ribbon steel plate type stirrup in beam-column joint area of stiff structure and construction method thereof

Abstract

The invention discloses a stiff structure beam-column joint area annular band steel plate type stirrup and a construction method thereof, and belongs to the technical field of building construction.The stiff structure beam-column joint area annular band steel plate type stirrup comprises a base, a square shell is fixedly connected to the base through a section steel column, and a locking assembly is fixedly connected to the upper side of the square shell; and a plurality of vertical main reinforcements are vertically inserted into the upper side of the base according to a rectangular array, penetrate through the locking assembly and can be kept in a vertical state. The bearing column has the beneficial effects that the base is matched with the vertical main reinforcements and the section steel column to form a stiff structure of the bearing column, the transverse main reinforcements and the longitudinal main reinforcements can be conveniently installed in a crossed mode through the square shell, the square shell can fix the relative positions of the transverse main reinforcements and the longitudinal main reinforcements through mortar pouring, the stability of the transverse main reinforcements and the longitudinal main reinforcements is improved, and the bearing column is convenient to use. By means of the design, construction in a narrow space is facilitated, the vertical main reinforcements are conveniently and vertically installed through the locking assemblies, the assembly difficulty is lowered, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a ring-shaped steel plate type stirrup in a beam-column node area of a rigid structure and a construction method thereof. Background Art

[0002] A rigid structure, also known as a steel-reinforced concrete structure, incorporates steel sections (such as I-beams and H-beams) within a concrete structure, allowing the steel and concrete to work together to share the load. This structure combines the high strength and ductility of steel with the high rigidity of concrete.

[0003] In the beam-column joint area of the rigid structure, traditional stirrups have the following problems: 1. Complex construction process and low efficiency. It is difficult to insert steel bars. The steel frames in the node area of the rigid structure are densely interlaced with the main bars of the beams and the longitudinal bars of the columns. Traditional rectangular stirrups need to pass through the reserved holes of the steel webs or flanges one by one, and the operating space is extremely small. If the steel webs are not opened in advance, they need to be cut on site, which not only increases the process but also may weaken the bearing capacity of the steel. If the holes are opened in advance, the hole position accuracy requirements are extremely high. It is easy for the stirrups to be unable to be installed due to construction errors. The on-site rework rate is as high as 20%-30%, and the binding operation takes a long time. Traditional stirrups are tied in a "loose-piece" manner. Dozens of stirrups are required to be positioned and tied one by one in each node area, and the manual operation is cumbersome. Taking a typical frame node as an example, the binding of stirrups at a single node takes about 4-6 hours and requires professional and technical workers to operate. The construction efficiency is 50% lower than that of the present invention. The above results indicate poor reliability of the connection with steel frame. Traditionally, the connection between stirrups and steel frame is mostly achieved by welding or adding anchor bars. However, welding can easily lead to local brittle fracture of the steel bars. When the anchor bar length is insufficient, the anchoring force cannot be guaranteed. Under seismic loads, the connection between stirrups and steel frame is prone to slippage or fracture, forming a weak link in the node area. Second, insufficient restraint performance in the core area of the joint. Conventional rectangular stirrups are discretely arranged, providing "point-type" restraint on the concrete in the core area, preventing continuous circumferential confining pressure. This makes the concrete susceptible to splitting failure under axial and shear forces. The compressive strength of the core area of the joint is only 1.2-1.5 times that of unconfined concrete, resulting in insufficient ductility and limited shear resistance. Conventional stirrups resist joint shear forces through their own shear resistance, but when the stirrups are spaced widely (typically 100-200mm), concrete cracks tend to develop along the gaps between the stirrups, leading to shear failure of the joint. Tests have shown that the ultimate shear force of conventional stirrup joints is 15%-20% lower than that of the present invention, resulting in significantly weaker seismic performance. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel plate type stirrup in the beam-column node area of a rigid structure and a construction method thereof in order to solve the above problems, which will be described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a steel plate-type stirrup with an annular belt in the beam-column node area of a rigid structure, comprising a base, a square shell fixedly connected to the base via a steel column, a locking assembly fixedly connected to the upper side of the square shell, and a plurality of vertical main bars vertically plugged into the upper side of the base in a rectangular array. The vertical main bars pass through the locking assembly and can maintain a vertical state. The four sides of the square shell are provided with a plurality of through holes distributed in a rectangular pattern, and the square shell is respectively interspersed with a plurality of transverse main reinforcements and longitudinal main reinforcements through the plurality of through holes; Stirrup assemblies are installed between two adjacent layers of longitudinal main reinforcement to surround all vertical main reinforcements.

[0006] The above-mentioned steel plate stirrups with annular belts in the beam-column node area of the rigid structure are adopted. The base cooperates with the vertical main reinforcement and the steel column to form the rigid structure of the load-bearing column. The square shell facilitates the cross-installation of the transverse main reinforcement and the longitudinal main reinforcement. The transverse main reinforcement and the longitudinal main reinforcement serve as the rigid structure of the load-bearing beam. The square shell can fix the relative positions of the transverse main reinforcement and the longitudinal main reinforcement by pouring mortar. The stirrup assembly is installed at the intersection of the vertical main reinforcement, the transverse main reinforcement and the longitudinal main reinforcement. The stirrup assembly is assembled from two parts. This design facilitates construction in narrow spaces.

[0007] Preferably, the locking assembly includes a rectangular frame, which is provided with a plurality of limiting grooves corresponding to the vertical main reinforcements, and a blocking member is fixedly connected in the limiting groove to prevent the vertical main reinforcement from detaching from the limiting groove.

[0008] Preferably, the blocking member includes two spring pieces, an expansion opening is provided on the outward side of the limiting groove, the two spring pieces are respectively and obliquely fixedly connected to the opposite sides of the expansion opening, and the two spring pieces are in contact with each other on the sides away from the expansion opening.

[0009] Preferably, the upper side of the square shell is open, and a stabilizing component is provided in the square shell for filling the gap between the transverse main reinforcement and the longitudinal main reinforcement.

[0010] Preferably, the stabilizing assembly includes a plurality of rectangular columns, which are inserted into the grid holes between the transverse main reinforcement and the longitudinal main reinforcement, and a plurality of openings for mortar flow are provided on the surface of the rectangular columns.

[0011] Preferably, the stirrup assembly includes two right-angle stirrups, the two ends of the two right-angle stirrups correspond to each other, and the opposite ends of the two right-angle stirrups are fixedly connected by bolts, and the two right-angle stirrups cooperate to form a rectangular sleeve that surrounds all the vertical main bars.

[0012] Preferably, two L-shaped rods are fixedly connected to the right-angle stirrups, and the two L-shaped rods are in contact with the upper sides of the transverse main reinforcement and the longitudinal main reinforcement respectively.

[0013] Preferably, the stirrup assembly includes a U-shaped plate, and the open part of the U-shaped plate is fixedly connected to a baffle by bolt 2. The baffle and the U-shaped plate can cooperate to enclose all the vertical main reinforcements, and the upper and lower sides of the U-shaped plate are respectively in contact with the adjacent two side transverse main reinforcements.

[0014] A construction method for annular steel plate stirrups in a beam-column node area of a rigid structure comprises the following steps: Step 1: Fix the base to the foundation. The base can be cast integrally with the foundation. Insert the steel column into the base before the base solidifies. Weld the square shell to the top of the steel column. Then weld the locking assembly to the upper side of the square shell. Step 2: Drill a hole on the base, insert the vertical main reinforcement into the hole first, and then snap the vertical main reinforcement into the locking assembly to keep the vertical main reinforcement in a vertical state; Step 3: Insert the transverse main reinforcement and the longitudinal main reinforcement into the square shell in sequence, so that the transverse main reinforcement and the longitudinal main reinforcement are crisscrossed; Step 4: Install several stirrup assemblies in layers at the intersections of the vertical main reinforcement, transverse main reinforcement and longitudinal main reinforcement. The stirrup assemblies are assembled from two parts.

[0015] The beneficial effects are: 1. The rigid structure of the load-bearing column is formed by the cooperation of the base, vertical main reinforcement and steel column. The square shell facilitates the cross-installation of transverse and longitudinal main reinforcements. The square shell can fix the relative position of the transverse and longitudinal main reinforcements by pouring mortar, thereby improving the stability of the transverse and longitudinal main reinforcements. The stirrup assembly is installed at the intersection of the vertical, transverse and longitudinal main reinforcements. The stirrup assembly is assembled from two parts, which facilitates construction in narrow spaces. The locking assembly facilitates the vertical installation of the vertical main reinforcement, reduces assembly difficulty and improves construction efficiency. 2. By setting up stabilizing components, the stability of the transverse and longitudinal main reinforcements can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a front view structural diagram of embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the stabilizing assembly of the present invention; Figure 4 This is a schematic diagram of the arrangement structure of the transverse main reinforcement and the longitudinal main reinforcement of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the steel column of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the locking assembly of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the blocking member of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of a stirrup assembly embodiment of the present invention; Figure 9 It is a schematic diagram of the three-dimensional structure of the stirrup assembly embodiment 2 of the present invention.

[0018] The following are the descriptions of the reference numerals: 1. Base; 2. Steel column; 3. Vertical main reinforcement; 4. Square shell; 5. Locking assembly; 6. Horizontal main reinforcement; 7. Longitudinal main reinforcement; 8. Stirrup assembly; 9. Stabilizing assembly; 10. Rectangular column; 11. Opening; 12. Rectangular frame; 13. Limiting groove; 14. Blocking piece; 15. Through hole; 16. Right-angle stirrup; 17. L-shaped rod; 18. Bolt 1; 19. Spring clip; 20. Expansion opening; 21. U-shaped plate; 22. Baffle; 23. Bolt 2. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0020] Example 1, see Figures 1-9 As shown, the present invention provides a steel plate stirrup with an annular belt in the beam-column node area of a rigid structure, comprising a base 1, a square shell 4 fixedly connected to the base 1 via a steel column 2, a locking assembly 5 fixedly connected to the upper side of the square shell 4, and a plurality of vertical main bars 3 vertically inserted in a rectangular array on the upper side of the base 1. The vertical main bars 3 pass through the locking assembly 5 and can maintain a vertical state; The four sides of the square shell 4 are provided with a plurality of through holes 15 distributed in a rectangular pattern. The square shell 4 is respectively penetrated by a plurality of transverse main ribs 6 and longitudinal main ribs 7 through the plurality of through holes 15. A stirrup assembly 8 is installed between two adjacent layers of longitudinal main reinforcement 7 to surround all the vertical main reinforcement 3.

[0021] As an optional embodiment, the locking assembly 5 includes a rectangular frame 12, which is provided with a plurality of limiting grooves 13 corresponding to the vertical main reinforcement 3. The limiting grooves 13 are fixedly connected with blocking members 14 for preventing the vertical main reinforcement 3 from being separated from the limiting grooves 13. The vertical main reinforcement 3 can be temporarily fixed by the locking assembly 5 to facilitate assembly.

[0022] The blocking member 14 includes two spring pieces 19. An expansion opening 20 is provided on the outward side of the limiting groove 13. The two spring pieces 19 are respectively fixedly connected to the opposite sides of the expansion opening 20 at an angle, and the sides of the two spring pieces 19 away from the expansion opening 20 are in contact with each other. The spring clips 19 are elastic and push the vertical main reinforcement 3 into the limiting groove 13. The spring clips 19 give way until the vertical main reinforcement 3 passes through between the two spring clips 19. The two spring clips 19 come into contact with each other to form a stable triangular structure, which can block the vertical main reinforcement 3 and prevent it from escaping from the limiting groove 13.

[0023] The upper side of the square shell 4 is open, and a stabilizing component 9 is provided in the square shell 4 for filling the gap between the transverse main reinforcement 6 and the longitudinal main reinforcement 7 .

[0024] The stabilizing assembly 9 includes a plurality of rectangular columns 10, which are inserted into the grid holes between the transverse main reinforcement 6 and the longitudinal main reinforcement 7. The surface of the rectangular columns 10 is provided with a plurality of openings 11 for the flow of mortar. Mortar needs to be poured into the square shell 4. Before pouring, the rectangular column 10 is inserted into the grid holes between the transverse main reinforcement 6 and the longitudinal main reinforcement 7, which can further improve the stability of the transverse main reinforcement 6 and the longitudinal main reinforcement 7.

[0025] The stirrup assembly 8 includes two right-angle stirrups 16, the two ends of the two right-angle stirrups 16 correspond to each other, and the opposite ends of the two right-angle stirrups 16 are fixedly connected by bolts 18. The two right-angle stirrups 16 cooperate to form a rectangular sleeve that surrounds all the vertical main bars 3.

[0026] Two L-shaped rods 17 are fixedly connected to the right-angle stirrup 16, and the two L-shaped rods 17 are in contact with the upper sides of the transverse main reinforcement 6 and the longitudinal main reinforcement 7 respectively. The right-angle stirrup 16 can be hung on the transverse main reinforcement 6 and the longitudinal main reinforcement 7 through the L-shaped rods 17, which makes it convenient for the staff to free up their hands to use bolts 18 to fix the opposite ends of the two right-angle stirrups 16. With this split design, it is easy to fix the stirrup assembly 8 in a narrow space such as the transverse main reinforcement 6 and the longitudinal main reinforcement 7.

[0027] The difference between the second embodiment and the first embodiment lies only in the specific implementation of the stirrup assembly 8, which is as follows: The stirrup assembly 8 includes a U-shaped plate 21, and a baffle 22 is fixedly connected to the open end of the U-shaped plate 21 by a second bolt 23. The baffle 22 cooperates with the U-shaped plate 21 to enclose all the vertical main bars 3. The upper and lower sides of the U-shaped plate 21 are in contact with the adjacent two transverse main bars 6 respectively. The two sides of the baffle 22 are fixedly connected to the U-shaped plate 21 by two bolts 23 respectively. The U-shaped plate 21 and the baffle 22 can cooperate to surround the vertical main reinforcement 3. The U-shaped plate 21 can be stably placed on the transverse main reinforcement 6, making it easy to install the U-shaped plate 21.

[0028] A construction method for annular steel plate stirrups in a beam-column node area of a rigid structure comprises the following steps: Step 1: Fix the base 1 to the foundation. The base 1 can be cast integrally with the foundation. Insert the steel column 2 into the base 1 before the base 1 solidifies. Weld the square shell 4 to the top of the steel column 2. Then weld the locking assembly 5 to the upper side of the square shell 4. Step 2: Drill a hole on the base 1, insert the vertical main reinforcement 3 into the hole, and then snap the vertical main reinforcement 3 into the locking assembly 5 to keep the vertical main reinforcement 3 in a vertical state; Step 3: insert the transverse main ribs 6 and the longitudinal main ribs 7 into the square shell 4 in sequence, so that the transverse main ribs 6 and the longitudinal main ribs 7 are crisscrossed; Step 4: Install several stirrup assemblies 8 in layers at the intersections of the vertical main reinforcement 3, the transverse main reinforcement 6 and the longitudinal main reinforcement 7. The stirrup assemblies 8 are assembled from two parts.

[0029] With the above structure, the base 1 cooperates with the vertical main reinforcement 3 and the steel column 2 to form the rigid structure of the load-bearing column. The square shell 4 facilitates the cross-installation of the transverse main reinforcement 6 and the longitudinal main reinforcement 7. The transverse main reinforcement 6 and the longitudinal main reinforcement 7 serve as the rigid structure of the load-bearing beam. The square shell 4 can fix the relative positions of the transverse main reinforcement 6 and the longitudinal main reinforcement 7 by pouring mortar. The stirrup assembly 8 is installed at the intersection node of the vertical main reinforcement 3, the transverse main reinforcement 6 and the longitudinal main reinforcement 7. The stirrup assembly 8 is assembled from two parts. This design facilitates construction in narrow spaces.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A steel plate type stirrup with ring band in the beam-column node area of a rigid structure, characterized by: The invention comprises a base (1), a square shell (4) is fixedly connected to the base (1) via a steel column (2), a locking assembly (5) is fixedly connected to the upper side of the square shell (4), and a plurality of vertical main ribs (3) are vertically inserted into the upper side of the base (1) in a rectangular array, and the vertical main ribs (3) pass through the locking assembly (5) and can maintain a vertical state; The four sides of the square shell (4) are each provided with a plurality of through holes (15) distributed in a rectangular pattern, and the square shell (4) is respectively interspersed with a plurality of transverse main ribs (6) and longitudinal main ribs (7) through the plurality of through holes (15); A stirrup assembly (8) is installed between two adjacent layers of longitudinal main reinforcement (7) to surround all the vertical main reinforcements (3).

2. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 1, characterized in that: The locking assembly (5) comprises a rectangular frame (12), the rectangular frame (12) being provided with a plurality of limiting grooves (13) corresponding to the vertical main reinforcement (3), and a blocking member (14) being fixedly connected in the limiting groove (13) for preventing the vertical main reinforcement (3) from being separated from the limiting groove (13).

3. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 2, characterized in that: The blocking member (14) comprises two spring pieces (19), an expansion opening (20) is provided on an outward side of the limiting groove (13), the two spring pieces (19) are respectively and obliquely fixedly connected to opposite sides of the expansion opening (20), and the sides of the two spring pieces (19) away from the expansion opening (20) are in contact with each other.

4. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 1, characterized in that: The upper side of the square shell (4) is open, and a stabilizing component (9) is provided in the square shell (4) for filling the gap between the transverse main ribs (6) and the longitudinal main ribs (7).

5. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 4, characterized in that: The stabilizing assembly (9) comprises a plurality of rectangular columns (10), wherein the rectangular columns (10) are inserted into the grid holes between the transverse main reinforcement (6) and the longitudinal main reinforcement (7), and a plurality of openings (11) for mortar flow are provided on the surface of the rectangular columns (10).

6. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 1, characterized in that: The stirrup assembly (8) includes two right-angle stirrups (16), the two ends of the two right-angle stirrups (16) correspond to each other, and the opposite ends of the two right-angle stirrups (16) are fixedly connected by bolts (18). The two right-angle stirrups (16) cooperate to form a rectangular sleeve that surrounds all the vertical main bars (3).

7. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 6, characterized in that: Two L-shaped rods (17) are fixedly connected to the right-angle stirrups (16), and the two L-shaped rods (17) are in contact with the upper sides of the transverse main reinforcement (6) and the longitudinal main reinforcement (7), respectively.

8. The steel plate type stirrups in the beam-column joint area of a rigid structure according to claim 1, characterized in that: The stirrup assembly (8) comprises a U-shaped plate (21), wherein the opening of the U-shaped plate (21) is fixedly connected to a baffle (22) via a second bolt (23), wherein the baffle (22) cooperates with the U-shaped plate (21) to enclose all the vertical main reinforcements (3), and the upper and lower sides of the U-shaped plate (21) are in contact with the adjacent transverse main reinforcements (6) respectively.

9. The construction method of the steel plate type stirrups in the beam-column node area of the rigid structure according to claim 1 is characterized in that: The following steps are involved: Step 1: The base (1) is fixedly connected to the foundation. The base (1) can be constructed by casting it integrally with the foundation. The steel column (2) is inserted into the base (1) before the base (1) solidifies. The square shell (4) is welded to the top of the steel column (2). The locking assembly (5) is then welded to the upper side of the square shell (4). Step 2: Drill a hole on the base (1), insert the vertical main reinforcement (3) into the hole, and then snap the vertical main reinforcement (3) into the locking assembly (5) to keep the vertical main reinforcement (3) in a vertical state; Step 3: insert the transverse main ribs (6) and the longitudinal main ribs (7) into the square shell (4) in sequence, so that the transverse main ribs (6) and the longitudinal main ribs (7) are crisscrossed; Step 4: Install several stirrup assemblies (8) in layers at the intersections of the vertical main reinforcement (3), the transverse main reinforcement (6) and the longitudinal main reinforcement (7). The stirrup assembly (8) is assembled from two parts.

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