A method of reinforcing a concrete slab beam
By applying prestressed steel tie rods to concrete slab beams to form stiffening rib structures, the problem of reduced load-bearing capacity caused by openings at the bottom of the beams is solved, ensuring that the load-bearing capacity can still be maintained even after the main reinforcement bars at the bottom of the beam are cut off, which has significant economic and social benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INSPECTION & CERTIFICATION CO LTD MCC
- Filing Date
- 2024-02-02
- Publication Date
- 2026-06-09
AI Technical Summary
In the existing technology, when the concrete slab beams of the blast furnace are shut down for maintenance, the bottom elevation of the beams is insufficient to lay pipes to remove residual iron, and the load-bearing capacity decreases after the bottom of the beams is cut off. Therefore, a reinforcement method is needed to ensure the maintenance of the load-bearing capacity.
By employing components such as steel tie rods, tensioning devices, intermediate struts, node plates, and tie bolts, and by applying prestressed steel tie rods to the concrete slab beam, a stiffening rib structure is formed to ensure that the load-bearing capacity can still be maintained after the opening is made at the bottom of the beam.
It achieves the maintenance of load-bearing capacity after opening the bottom of the beam, is simple to operate, has significant economic and social benefits, and saves time and costs.
Smart Images
Figure CN117846365B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for reinforcing large concrete slab beams, and more particularly to a method for reinforcing large concrete slab beams before cutting the main reinforcement bars and opening the bottom of the beam, belonging to the field of industrial building concrete structure reinforcement technology. Background Technology
[0002] The tapping platform of a steel plant's blast furnace is a crucial component, serving as the tapping trough, equipment storage, and loading area. Initially, the tapping platform was designed with production and safety in mind. However, blast furnaces require shutdown maintenance every 10-15 years, and one critical task is removing residual iron from the furnace.
[0003] The blast furnace and tapping platform designed around 2000 did not take into account the height difference between the furnace body's residual iron tapping spout and the nearby concrete slab beams during shutdown maintenance. The bottom elevation of the slab beams was lower than that of the furnace body's residual iron tapping spout, making it impossible to lay pipes at the furnace body's residual iron tapping spout to remove the residual iron. The reason for this was the obstruction caused by the bottom part of the concrete slab beams. Therefore, when discharging residual iron at the furnace body's residual iron tapping spout, a portion of the bottom of the concrete slab beams, with an area of 2200mm × 750mm, needs to be cut off. At this time, the tensile main reinforcement at the bottom of the beam has been cut off.
[0004] To ensure that residual iron can be discharged normally during blast furnace shutdown and maintenance, a rectangular block needs to be removed from the bottom of the large plate beam. Before removal, the large plate beam should be reinforced to ensure that it can provide the load-bearing capacity it had before the rectangular block was removed.
[0005] Therefore, providing a method for strengthening large concrete slab beams, ensuring that the beams with openings at the bottom and cut main reinforcement bars can achieve the same load-bearing capacity as before the openings were made, has become a pressing technical challenge in this field. Summary of the Invention
[0006] One of the objectives of this invention is to provide a reinforcement system for large concrete slab beams, ensuring that after reinforcement of beams with openings at the bottom and cut main reinforcement bars, the beams can achieve the same load-bearing capacity as before the openings were made.
[0007] The above-mentioned objective of this invention is achieved through the following technical solution:
[0008] A reinforcement system for a large concrete slab beam is characterized by comprising steel tie rods, tensioning devices, intermediate struts, node plates, tie bolts, stiffening ribs, tensioning screws, C-shaped pads, and anti-loosening nuts. One end of the steel tie rod is fixed to a concrete column by tie bolts and node plates, and the other end is fixed to the concrete beam by tie bolts and node plates. There are a total of six steel tie rods, of which two are diagonal tie rods and four are transverse tie rods. One end of the two diagonal tie rods is fixed to the concrete column by tie bolts and node plates, and the other end is fixed to the concrete beam by tie bolts and node plates.
[0009] Preferably, the tensioning device includes a tensioning screw, a C-shaped washer, and a lock nut, with the tensioning screw and the C-shaped washer connected by the lock nut.
[0010] Preferably, the two inclined steel tie rods are spaced 300mm apart at the concrete column and 300mm apart at the other end. The distance between the two ends of the inclined steel tie rod is 150mm. Two tensioning devices and an intermediate support rod are provided in the middle, and the distance between them is 1390mm.
[0011] Preferably, the four horizontal steel tie rods are spaced 150mm apart at one end of the concrete column and 150mm apart at the other end. The distance between the two ends of the four horizontal steel tie rods is 176mm. The intermediate support rods between the steel tie rods are arranged at the middle position along the length of the steel tie rods. The spacing between the intermediate support rods and the steel tie rods is 300mm. The tensioning device is located at 1 / 4 and 3 / 4 of the length of the steel tie rods.
[0012] Preferably, there are four node plates, namely a first node plate, a second node plate, a third node plate, and a fourth node plate.
[0013] Preferably, there are two tie bolts, namely a first tie bolt and a second tie bolt.
[0014] Preferably, one end of the steel tie rod is fixed to the concrete column by a first tie bolt and a fourth node plate, and the other end is fixed to the concrete beam by a second tie bolt and a first node plate, a second node plate, and a third node plate.
[0015] Preferably, the stiffening ribs are installed inside the right-angled inside corner formed by the second node plate and the third node plate, with a vertical spacing of 200mm, and a total of 5 ribs.
[0016] Another objective of this invention is to provide a method for reinforcing large concrete slab beams, ensuring that, after reinforcement of beams with openings at the bottom and cut main reinforcement bars, the beams can achieve the same load-bearing capacity as before the openings were made.
[0017] The above-mentioned objective of this invention is achieved through the following technical solution:
[0018] A method for reinforcing large concrete slab beams includes the following steps:
[0019] Step S1: Drill holes in the concrete beam where tie bolts are required. After drilling, install the first node plate, second node plate, third node plate, and fourth node plate in the predetermined positions.
[0020] Step S2: After the first node plate, second node plate, third node plate and fourth node plate are installed, stiffening ribs are welded on the second node plate and the third node plate.
[0021] Step S3: After the first node plate, second node plate, third node plate, fourth node plate and stiffening rib are installed, install the steel tie rods in the predetermined positions and weld the ends of the steel tie rods to the first node plate, second node plate, third node plate and fourth node plate.
[0022] Step S4: After the ends of the steel tie rod are welded to the first node plate, the second node plate, the third node plate, and the fourth node plate, install the intermediate support rod and the tensioning device.
[0023] Step S5: Tension the steel tie rod using a tensioning device until the predetermined control stress is reached.
[0024] Preferably, in step S1, the steel grade of the first node plate, the second node plate, the third node plate, and the fourth node plate is Q345B. Before installation, holes need to be pre-drilled on the first node plate, the second node plate, the third node plate, and the fourth node plate according to the hole positions of the tie bolts.
[0025] Preferably, in step S2, when installing the fourth node plate, the fourth node plate is fixed to the concrete column with the first tie rod, and the tie rod is embedded into the concrete using the rebar anchoring technique. The main purpose is to fix the fourth node plate. The first node plate, the second node plate, and the third node plate are fixed to the concrete beam by the second tie rod.
[0026] Preferably, in step S3, the processed steel tie rod is installed in the predetermined position, and the ends of the steel tie rod are connected to the first node plate, the second node plate, the third node plate and the fourth node plate by welding, with a weld leg size of 8mm.
[0027] Preferably, in step S4, the function of the intermediate support rod is to separate the steel tie rods by a certain distance, so as to facilitate the tensioning of the steel tie rods using a tensioning device.
[0028] Preferably, in step S5, a tensioning device is used to apply prestress to the steel tie rod until a predetermined control stress is reached.
[0029] Beneficial effects:
[0030] The concrete slab beam reinforcement method of the present invention is easy to install and simple to operate. It can ensure that after the beam with openings at the bottom and main reinforcement bars are cut, the beam can be reinforced to the same load-bearing capacity as before the openings were made, which has high economic and social benefits.
[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this does not imply any limitation on the scope of protection of the present invention. Attached Figure Description
[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.
[0034] Figure 1 This is a schematic elevation view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0035] Figure 2 This is a plan view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0036] Figure 3 This is a cross-sectional schematic diagram of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0037] Figure 4 This is a schematic elevation view of the first node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0038] Figure 5 This is a schematic elevation view of the second node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0039] Figure 6 This is a schematic elevation view of the third node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0040] Figure 7 This is a schematic diagram of the intermediate strut in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0041] Figure 8 This is a schematic diagram of the tensioning device in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention.
[0042] Key reference numerals:
[0043] 1. Steel tie rod 2. Tensioning device
[0044] 3. Intermediate strut; 4. First node plate
[0045] 5 Second node plate 6 Third node plate
[0046] 7 Fourth node plate 8 First tie bolt
[0047] 9 Second tie bolt 10 Stiffening rib
[0048] 11 Tensioning screw 12 C-shaped pad
[0049] 13 Anti-loosening nuts Detailed Implementation
[0050] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other.
[0051] The following description sets forth many specific details in order to provide a full understanding of the invention, but the invention may also be implemented in other ways different from those described herein; obviously, the embodiments described in the specification are only some, not all, of the embodiments of the invention.
[0052] Unless otherwise specified, all components used in this invention are conventional components that are commercially available in this technical field; equipment not described in detail is commercially available equipment.
[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0054] Example 1
[0055] like Figure 1 The image shown is an elevation view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 2The diagram shown is a plan view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown Figure 3 The image shown is a cross-sectional schematic diagram of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 4 The image shown is a schematic elevation view of the first node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 5 The image shown is a schematic elevation view of the second node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 6 The image shown is a schematic elevation view of the third node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 7 The diagram shown is a structural schematic of the intermediate strut in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; as shown... Figure 8 The diagram shown is a structural schematic of the tensioning device in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention; wherein, 1 is a steel tie rod, 2 is a tensioning device, 3 is an intermediate support rod, 4 is a first node plate, 5 is a second node plate, 6 is a third node plate, 7 is a fourth node plate, 8 is a first tie bolt, 9 is a second tie bolt, 10 is a stiffening rib, 11 is a tensioning screw, 12 is a C-shaped pad, and 13 is an anti-loosening nut;
[0056] In the concrete slab beam reinforcement method of this invention, the steel tie rods are located on the outside of the beam being reinforced. By applying prestressed steel tie rods to beams with openings or cut bottom reinforcement, the bearing capacity lost at the bottom of the beam due to the openings or cut bottom reinforcement is replenished. The steel tie rods 1 are 30mm diameter Grade III hot-rolled threaded steel bars, with 6 rods on one side of the beam, including 4 transverse and 2 diagonal rods. Figure 2 As shown in Figure 3, which is a plan view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention, one end of the steel tie rod 1 passes through the concrete column and is connected to the fourth node plate 7 by welding. The reinforcing bar is welded to the fourth node plate 7, and the weld leg size is 8mm. As shown in Figure 3, which is a cross-sectional view of the concrete slab beam reinforcement method described in Embodiment 1 of the present invention, the applied 12 steel tie rods are tightly attached to the reinforced concrete slab beam. Figure 4 The figure shown is a schematic elevation view of the first node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention. The figure indicates the number and relative positions of the second tie bolts 9 (bolt holes) in the first node plate 4. The thickness of the first node plate 4 is 12mm, it is made of Q355B steel, and the tie bolts b9 are M24 high-strength bolts. Figure 5 The figure shows a schematic elevation view of the second node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention. The figure indicates the number and relative positions of the second tie bolts 9 (bolt holes) in the second node plate 5. The thickness of the second node plate 5 is 12mm, it is made of Q355B steel, and the second tie bolts 9 are M24 high-strength bolts. Figure 6 The figure shows a schematic elevation view of the third node plate in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention. The figure indicates the number and relative positions of the second tie bolts 9 (bolt holes) in the third node plate 6. The thickness of the third node plate 6 is 12mm, it is made of Q355B steel, and the tie bolts b9 are M24 high-strength bolts. Figure 7 The diagram shows the structure of the intermediate support rod in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention. The intermediate support rod 3 has two channel steels at its two ends and a 30mm × 4mm circular steel pipe in the middle. The function of the intermediate support rod 3 is to separate the steel tie rod 1, providing spacing to facilitate the use of the tensioning device 2 to tighten the steel tie rod 1 and provide prestress. The channel steels are used to fix the steel tie rod 1, preventing it from wobbling. Figure 8 The diagram shows the structure of the tensioning device in the concrete slab beam reinforcement method described in Embodiment 1 of the present invention. The tensioning device 2 includes a tensioning screw 11 with a diameter of 22 mm and a total length of 450 mm, a C-shaped pad 12 with a thickness of 12 mm, and a lock nut 13 with a height of 35 mm. The tensioning screw 11 and the C-shaped pad 12 are connected by the lock nut 13. The main function of the tensioning device 2 is to tension the steel tie rod 2 and provide prestress.
[0057] The reinforcement system for the concrete slab beam described in Embodiment 1 of this invention includes: steel tie rods 1, tensioning devices 2, intermediate struts 3, first node plates 4, second node plates 5, third node plates 6, fourth node plates 7, first tie bolts 8, second tie bolts 9, stiffening ribs 10, tensioning screws 11, C-shaped pads 12, and anti-loosening nuts 13. One end of the steel tie rod 1 is fixed to the concrete column by the first tie bolt 8 and the fourth node plate 7, and the other end is fixed to the concrete beam by the second tie bolt 9 and the first node plates 4, 5, and 6. There are a total of six steel tie rods 1, of which two are diagonal and four are transverse. One end of the two diagonal steel tie rods 1 is fixed to the concrete column by the first tie bolt 8 and the fourth node plate 7, and the other end is fixed to the concrete beam by the second tie bolt 9 and the first node plates 4, 5, and 6. Fixed on a concrete beam, the two diagonally braced steel tie rods 1 are spaced 300mm apart at one end of the concrete column and 300mm apart at the other end. The distance between the two ends of the diagonally braced steel tie rods 1 is 150mm. Two tensioning devices 2 and one intermediate support rod 3 are provided in the middle, with a distance of 1390mm between them. The four horizontally braced steel tie rods 1 are spaced 150mm apart at one end of the concrete column and 150mm apart at the other end. The distance between the two ends of the four horizontally braced steel tie rods 1 is 176mm. The intermediate support rod 3 between the steel tie rods 1 is arranged in the middle position along the length of the steel tie rod 1. The intermediate support rod 3 makes the steel tie rod 1 spread apart at a distance of 300mm. The tensioning devices 2 are located at 1 / 4 and 3 / 4 of the length of the steel tie rod 1. The stiffening ribs 10 are installed in the right-angled concave corner formed by the second node plate 5 and the third node plate 6, with a vertical spacing of 200mm, for a total of 5.
[0058] The reinforcement method for concrete slab beams of the present invention uses a tensioning device 2 to tension the steel tie rod 1. The end of the steel tie rod 1 is fixed to the column end and the beam end through a node plate to provide prestress. The method of applying prestressed steel tie rods to beams with openings or cut bottom reinforcements supplements the bearing capacity lost at the bottom of the beam due to openings or cut bottom reinforcements.
[0059] The method for reinforcing large concrete slab beams of the present invention includes the following steps:
[0060] 1) Drilling positioning
[0061] Drilling and positioning involves three aspects: first, drilling bolt holes on the gusset plate according to the positioning of the tie bolts; second, drilling holes in the concrete component according to the positions of the gusset plate and bolt holes, and installing the tie bolts and gusset plate; and third, drilling holes in the concrete where steel tie rods need to be installed, in preparation for the installation of steel tie rods.
[0062] 2) Install components
[0063] After drilling and positioning are completed, component installation begins. The first step is to install the gusset plate and tie bolts, fixing the gusset plate to the concrete column and beam using the tie bolts. The second step is to install the steel tie rods. After the steel tie rods are positioned, their ends are welded to the gusset plate. The areas where the steel tie rods pass through the concrete are filled with cement mortar. The third step is to install the intermediate struts and tensioning devices.
[0064] 3) Tighten
[0065] After the components are installed, the steel tie rods are tightened using a tensioning device to provide prestress.
[0066] 4) Making a hole
[0067] Once the steel tie rods are tightened, the reinforcement of the concrete slab beam is complete. At this point, holes can be made in the concrete slab beam and the bottom main reinforcement bars can be cut, depending on production needs.
[0068] Specifically, it includes the following steps:
[0069] Step S1: Drill holes in the concrete beam where tie bolts are required. After drilling, install the first node plate, second node plate, third node plate, and fourth node plate in the predetermined positions.
[0070] Step S2: After the first node plate, second node plate, third node plate and fourth node plate are installed, stiffening ribs are welded on the second node plate and the third node plate.
[0071] Step S3: After the first node plate, second node plate, third node plate, fourth node plate and stiffening rib are installed, install the steel tie rods in the predetermined positions and weld the ends of the steel tie rods to the first node plate, second node plate, third node plate and fourth node plate.
[0072] Step S4: After the ends of the steel tie rod are welded to the first node plate, the second node plate, the third node plate, and the fourth node plate, install the intermediate support rod and the tensioning device.
[0073] Step S5: Tension the steel tie rod using a tensioning device until the predetermined control stress is reached.
[0074] Preferably, in step S1, the steel grade of the first node plate, the second node plate, the third node plate, and the fourth node plate is Q345B. Before installation, holes need to be pre-drilled on the first node plate, the second node plate, the third node plate, and the fourth node plate according to the hole positions of the tie bolts.
[0075] In step S2, when installing the fourth node plate, the fourth node plate is fixed to the concrete column with the first tie rod. The tie rod is embedded into the concrete using the rebar anchoring technique. The main purpose is to fix the fourth node plate. The first node plate, the second node plate, and the third node plate are fixed to the concrete beam by the second tie rod.
[0076] In step S3, the processed steel tie rod is installed in the predetermined position. The ends of the steel tie rod are all connected to the first node plate, the second node plate, the third node plate, and the fourth node plate by welding. The weld leg size is 8mm.
[0077] In step S4, the function of the intermediate support rod is to separate the steel tie rods to facilitate tensioning of the steel tie rods using a tensioning device;
[0078] In step S5, a tensioning device is used to apply prestress to the steel tie rod until the predetermined control stress is reached.
[0079] The concrete slab beam reinforcement method of the present invention replenishes the bearing capacity lost at the bottom of the beam due to the opening and the cutting of the bottom reinforcement by applying prestressed steel tie rods to the slab beam with openings and the cutting of the bottom reinforcement. In other words, the component is reinforced in advance, and then the opening is made in the component according to production needs. This method is simple to operate and easy to install. It can achieve early reinforcement in areas with dense main structural components and production equipment, which can save time, reduce costs and increase installability to a great extent.
[0080] The reinforcement method of the present invention is easy to install and simple to operate, and can ensure that the original structure and the newly added steel tie rod share the load, thereby achieving the bearing capacity of the large plate beam before the opening is made at the bottom.
[0081] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.
Claims
1. A reinforcement method for a reinforcement system of a large concrete slab beam, the reinforcement system comprising steel tie rods, tensioning devices, intermediate struts, node plates, tie bolts, stiffening ribs, tensioning bolts, C-shaped washers, and anti-loosening nuts; one end of each steel tie rod is fixed to a concrete column via tie bolts and node plates, and the other end is fixed to the concrete beam via tie bolts and node plates, wherein there are a total of six steel tie rods, wherein... Two are diagonal braces and four are horizontal braces. One end of the two diagonal steel tie rods is fixed to the concrete column by tie bolts and gusset plates, and the other end is fixed to the concrete beam by tie bolts and gusset plates. Includes the following steps: Step S1: Drill holes in the concrete beam where tie bolts are required. After drilling, install the first node plate, second node plate, third node plate, and fourth node plate in the predetermined positions. Step S2: After the first node plate, second node plate, third node plate and fourth node plate are installed, stiffening ribs are welded on the second node plate and the third node plate. Step S3: After the first node plate, second node plate, third node plate, fourth node plate and stiffening rib are installed, install the steel tie rods in the predetermined positions and weld the ends of the steel tie rods to the first node plate, second node plate, third node plate and fourth node plate. Step S4: After the ends of the steel tie rod are welded to the first node plate, the second node plate, the third node plate, and the fourth node plate, install the intermediate support rod and the tensioning device. Step S5: Tension the steel tie rod using a tensioning device until the predetermined control stress is reached.
2. The reinforcement method of the reinforcement system for concrete slab beams according to claim 1, characterized in that: The tensioning device includes a tensioning screw, a C-shaped washer, and a lock nut. The tensioning screw and the C-shaped washer are connected by the lock nut.
3. The reinforcement method of the reinforcement system for concrete slab beams according to claim 2, characterized in that: The two steel tie rods of the diagonal bracing are spaced 300mm apart at the concrete column and 300mm apart at the other end. The distance between the two ends of the diagonal steel tie rod is 150mm. There are two tensioning devices and an intermediate support rod in the middle, and the distance between them is 1390mm.
4. The reinforcement method of the reinforcement system for concrete slab beams according to claim 3, characterized in that: The four horizontal steel tie rods are spaced 150mm apart at one end of the concrete column and 150mm apart at the other end. The distance between the two ends of the four horizontal steel tie rods is 176mm. The intermediate support rods between the steel tie rods are arranged in the middle of the length of the steel tie rods. The intermediate support rods open the steel tie rods at a distance of 300mm. The tensioning device is located at 1 / 4 and 3 / 4 of the length of the steel tie rods.
5. The reinforcement method of the reinforcement system for concrete slab beams according to claim 4, characterized in that: There are four node boards: the first node board, the second node board, the third node board, and the fourth node board.
6. The reinforcement method of the reinforcement system for concrete slab beams according to claim 5, characterized in that: There are two tie bolts, namely the first tie bolt and the second tie bolt.
7. The reinforcement method of the reinforcement system for concrete slab beams according to claim 6, characterized in that: One end of the steel tie rod is fixed to the concrete column by the first tie bolt and the fourth node plate, and the other end is fixed to the concrete beam by the second tie bolt and the first node plate, the second node plate, and the third node plate.
8. The reinforcement method of the reinforcement system for concrete slab beams according to claim 7, characterized in that: The stiffening ribs are installed inside the right-angled inside corner formed by the second and third node plates, with a vertical spacing of 200mm, and a total of 5 ribs.
9. The reinforcement method of the reinforcement system for concrete slab beams according to claim 8, characterized in that: In step S1, the steel grade of the first node plate, the second node plate, the third node plate, and the fourth node plate is Q345B. Before installation, holes need to be drilled in advance on the first node plate, the second node plate, the third node plate, and the fourth node plate according to the hole positions of the tie bolts. In step S2, when installing the fourth node plate, the fourth node plate is fixed to the concrete column with the first tie rod, and the tie rod is embedded into the concrete using the rebar anchoring technique to fix the fourth node plate; the first node plate, the second node plate, and the third node plate are fixed to the concrete beam by the second tie rod. In step S3, the processed steel tie rod is installed in the predetermined position. The ends of the steel tie rod are all connected to the first node plate, the second node plate, the third node plate, and the fourth node plate by welding. The weld leg size is 8mm. In step S4, the function of the intermediate support rod is to separate the steel tie rods to facilitate tensioning of the steel tie rods using a tensioning device; In step S5, a tensioning device is used to apply prestress to the steel tie rod until the predetermined control stress is reached.