Reinforcing structure for beam-column joint of reinforced beam

Abstract

The utility model provides a beam-column joint reinforcing structure of a reinforced beam, which is characterized in that steel plates are respectively fixed at the beam top and the beam bottom of the reinforced beam, and the steel plates are fixed on a reinforcing beam through bolts; a plurality of beam bottom U-shaped steel hoop plates are densely arranged in the area, close to the frame column, of the beam bottom of the reinforced beam, and the two U-shaped ends of each beam bottom U-shaped steel hoop plate are fixed to the two sides of the reinforced beam through metal pressing strips in cooperation with bolts; an L-shaped steel plate is arranged between the beam top and the frame column, the L-shaped steel plate presses the steel plate on the beam top on the beam top, and the L-shaped steel plate is respectively fixed with the frame column and the beam top through bolts; a frame column U-shaped steel hoop plate is arranged on the side, close to the reinforced beam, of the frame column, the L-shaped steel plate is pressed on the frame column through the frame column U-shaped steel hoop plate, and the two U-shaped ends of the frame column U-shaped steel hoop plate are fixed to the two sides of the frame column through bolts. The structure has the advantages that the reinforcing pieces are processed by adopting a prefabrication means, the site construction workload is reduced, the working difficulty is reduced, and the anti-seismic safety and the structural safety of a building are improved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering, specifically to a reinforcement structure for beam-column joints. Background Technology

[0002] Public building engineering designs often employ concrete frame structures, and the corresponding structural safety level and seismic resistance level are designed according to the building's function and lifespan.

[0003] However, in practice, there are situations where construction projects are suddenly forced to stop midway through construction, or where the construction unit changes the overall function of the building. This results in the original building's seismic safety and structural safety failing to meet the new functional requirements or the requirements of existing national standards and specifications, necessitating reinforcement measures to strengthen the existing building components.

[0004] Currently, the common approach is to increase the cross-sectional size of the components and use post-installed rebar. This method of structural treatment involves complex procedures, high costs, is difficult to implement due to space constraints, and causes some damage to the old structure.

[0005] Given this problem, there is an urgent need for a new solution to improve the seismic and structural safety of renovated buildings through more reasonable means, while meeting the new functional requirements of buildings and the requirements of current national standards and specifications. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by providing a reinforced beam-column joint reinforcement structure that uses prefabrication to process reinforcement components, reduces on-site construction workload, lowers work difficulty, and improves the seismic safety and structural safety of buildings.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a reinforced beam-column joint reinforcement structure, including a frame column and a reinforced beam;

[0008] The top and bottom of the reinforced beam are respectively fixed with steel plates, which are fixed to the reinforced beam by bolts;

[0009] Several U-shaped steel hoops are densely installed at the bottom of the beam near the frame column area. The U-shaped steel hoops press the steel plate at the bottom of the beam tightly against the bottom of the beam. The two U-shaped ends of the U-shaped steel hoops are fixed to both sides of the beam under reinforcement by metal pressure strips and bolts.

[0010] An L-shaped steel plate is provided between the top of the beam and the frame column. The L-shaped steel plate presses the steel plate on the top of the beam tightly against the top of the beam. The L-shaped steel plate is fixed to the frame column and the top of the beam respectively by bolts.

[0011] A U-shaped steel hoop is installed on the side of the frame column near the beam being reinforced. The U-shaped steel hoop presses the L-shaped steel plate onto the frame column. The two U-shaped ends of the U-shaped steel hoop are fixed to both sides of the frame column with bolts.

[0012] Preferably, a structural adhesive layer is provided between the steel plates at the top and bottom of the beam and the top and bottom of the beam.

[0013] Preferably, a structural adhesive layer is provided between the L-shaped steel plate and the reinforced beam and frame column.

[0014] Preferably, a structural adhesive layer is provided between the U-shaped steel hoop plate at the bottom of the beam and the beam being reinforced, between the U-shaped steel hoop plate of the frame column and the frame column, and between the pressure strip and the beam being reinforced.

[0015] Preferably, all bolts are chemical bolts.

[0016] Preferably, the distance between the chemical bolts used to fix the steel plate and the edge of the steel plate is ≥25mm.

[0017] Preferably, the densified area of ​​the U-shaped steel hoop plate at the bottom of the beam is twice the beam height, with at least 4 U-shaped steel hoop plates evenly distributed and fixed by M8 chemical bolts. The distance between the U-shaped steel hoop plate at the bottom of the beam and the root of the frame column is ≥25mm, and the steel hoop thickness is ≥4mm.

[0018] Preferably, the beam end length of the L-shaped steel plate is ≥1000mm, the column end length is ≥600mm, and the steel plate thickness is ≥4mm.

[0019] Preferably, the steel plate, starting from the beam support of the reinforced beam, has an overall length ≥ one-third of the beam span length and a thickness ≥ 4mm.

[0020] Preferably, the metal strip matching the U-shaped steel hoop at the bottom of the beam is an integral strip, and the width of the metal strip is ≥100mm and the thickness is ≥3mm.

[0021] This utility model has substantial features and progress compared with the prior art. Specifically, this utility model uses steel components to reinforce the beam-column joint area. The steel components can be prefabricated in the factory, thereby reducing on-site construction steps and reducing on-site construction difficulty. There is no need for secondary concrete construction of the beam-column structure, and construction efficiency is guaranteed.

[0022] The beam is reinforced with steel plates, and further reinforced with U-shaped steel hoops. The load on the reinforced beam is transferred to the frame column by L-shaped steel plates, thereby satisfying the load-bearing capacity and seismic resistance of the beam components. The L-shaped steel plates are further reinforced by U-shaped steel hoops to ensure the stability of force transmission.

[0023] This solution improves the seismic and structural safety of functionally renovated buildings, meets the new functional requirements of the renovated buildings and the requirements of current national standards and specifications. The structural form of bonded steel plates and post-chemical bolt anchoring increases the seismic resistance and safety of building components. The steel plate materials used can be customized and mass-produced in the factory, transported to the site for assembly, which is simple, reduces on-site construction procedures, ensures structural construction quality, improves construction efficiency, reduces construction costs, and does not damage the original structure, thus saving resources and protecting the environment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a beam-column joint reinforcement structure in this utility model.

[0025] Figure 2 This is a schematic diagram of end face 1-1 in a beam-column joint reinforcement structure of this utility model.

[0026] In the diagram: 1. Frame column; 2. Beam to be reinforced; 11. L-shaped steel plate; 12. U-shaped steel hoop; 21. Top steel plate of beam; 22. Bottom steel plate of beam; 23. Bottom U-shaped steel hoop of beam; 24. Metal strip; 25. Bolt. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0028] like Figure 1 and Figure 2 As shown, a beam-column joint reinforcement structure includes a frame column 1 and a reinforced beam 2.

[0029] The top and bottom of the reinforced beam 2 are respectively fixed with steel plates. In this embodiment, they are divided into a top steel plate 21 and a bottom steel plate 22. The steel plates are fixed to the reinforced beam with bolts.

[0030] Specifically, the steel plate is installed during construction using the following steps.

[0031] The first step is to clean the beams and columns down to the concrete surface, grind the surface smooth, roughen it with a wire brush, remove dust with a compressed air machine, and wipe the surface with acetone-soaked cotton wool.

[0032] The second step is to remove rust and roughen the bonding surfaces of the steel plates. Grind the steel plates with a flat grinding wheel until a metallic luster appears. The grinding lines should be perpendicular to the direction of force on the steel plates. Then wipe them clean with cotton wool soaked in acetone.

[0033] The third step is to unload the load on the component to be reinforced before pasting the steel plate.

[0034] The fourth step is to apply a thin and even layer of epoxy resin structural adhesive (with a thickness of about 2-4mm) to the concrete surface and the steel plate bonding surface, and then attach the steel plate to the concrete surface.

[0035] Several U-shaped steel hoops 23 are densely installed at the bottom of the beam near the frame column area. The U-shaped steel hoops 23 press the bottom steel plate 22 tightly against the bottom of the beam. The two U-shaped ends of the U-shaped steel hoops 23 are fixed to both sides of the beam under reinforcement by metal pressure strips 24 and bolts. When installing the U-shaped steel hoops 23, they are first pre-fixed by structural adhesive, then fixed by metal pressure strips 24, and finally fixed with bolts 25. The bolt fixing position is the part where the metal pressure strip and the U-shaped steel hoops 23 overlap.

[0036] It should be noted that there are a large number of bolts in the attached drawings. To avoid cluttering the view, only a small number of bolts, numbered 25, are used to indicate bolts in other locations. Bolts in other locations are not labeled again.

[0037] An L-shaped steel plate 11 is provided between the top of the beam and the frame column 1. The L-shaped steel plate 11 presses the top steel plate 21 of the beam onto the top of the beam. The L-shaped steel plate 11 is fixed to the frame column 1 and the top of the beam respectively by bolts. In the actual installation, the L-shaped steel plate 11 is also bonded and fixed to the beam and column in advance with structural adhesive, and then fixed with bolts.

[0038] A U-shaped steel hoop plate 12 is installed on the side of the frame column 1 near the reinforced beam 2. The U-shaped steel hoop plate 12 presses the L-shaped steel plate 11 onto the frame column 1. The two U-shaped ends of the U-shaped steel hoop plate 12 are fixed to both sides of the frame column 1 by bolts. Similar to the installation of the above-mentioned structural components, it is pre-fixed by using structural adhesive and then fixed by bolts.

[0039] All bolts used are chemical bolts. After the bolts are installed in place, apply appropriate pressure. Finally, after the assembly is complete, structural adhesive needs to be injected into the gaps between each steel component and the concrete surface to ensure the adhesion is tight.

[0040] Each steel component is protected with epoxy resin mixed with dry sand, and should be compacted by force during construction.

[0041] In terms of parameter control, the spacing between the chemical bolts used to fix the steel plate and the edge of the steel plate should be ≥25mm. When the width of the steel plate is greater than 300mm, the chemical bolts should be arranged in double rows.

[0042] Two M12 anchor bolts are used to fix the L-shaped steel plate 11 at the top of the beam; three M22 anchor bolts are used to fix the frame column 1; M10 anchor bolts are used to fix the top and bottom of the beam, evenly distributed at 300mm intervals; four M8 anchor bolts are used to reinforce the beam ends, evenly distributed within a range of twice the beam height; four M8 anchor bolts are used to fix the pressure strip, evenly distributed within a range of twice the beam height.

[0043] The distance between the U-shaped steel hoop plate at the bottom of the beam near the frame column and the base of the frame column is ≥25mm, and the hoop thickness is ≥4mm; the beam end length of the L-shaped steel plate is ≥1000mm, the column end length is ≥600mm, and the plate thickness is ≥4mm; the overall length of the steel plate from the beam support of the reinforced beam is ≥3 / 3 of the beam span, the plate thickness is ≥4mm, and the design tensile strength of the reinforcing steel plate is Fsp=210MPa. The metal pressure strip matching the U-shaped steel hoop at the bottom of the beam is an integral pressure strip, the width of the metal pressure strip is ≥100mm, the thickness is ≥3mm, and the metal pressure strip is fixed with 4 M8 bolts.

[0044] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A beam-column joint reinforcement structure, characterized in that: Including frame columns and reinforced beams; The top and bottom of the reinforced beam are respectively fixed with steel plates, which are fixed to the reinforced beam by bolts; Several U-shaped steel hoops are densely installed at the bottom of the beam near the frame column area. The U-shaped steel hoops press the steel plate at the bottom of the beam tightly against the bottom of the beam. The two U-shaped ends of the U-shaped steel hoops are fixed to both sides of the beam under reinforcement by metal pressure strips and bolts. An L-shaped steel plate is provided between the top of the beam and the frame column. The L-shaped steel plate presses the steel plate on the top of the beam tightly against the top of the beam. The L-shaped steel plate is fixed to the frame column and the top of the beam respectively by bolts. A U-shaped steel hoop is installed on the side of the frame column near the beam being reinforced. The U-shaped steel hoop presses the L-shaped steel plate onto the frame column. The two U-shaped ends of the U-shaped steel hoop are fixed to both sides of the frame column with bolts.

2. The beam-column joint reinforcement structure according to claim 1, characterized in that: A structural adhesive layer is provided between the steel plates at the top and bottom of the beam and the top and bottom of the beam.

3. The beam-column joint reinforcement structure according to claim 1 or 2, characterized in that: A structural adhesive layer is provided between the L-shaped steel plate and the reinforced beam and frame column.

4. The beam-column joint reinforcement structure according to claim 1 or 2, characterized in that: Structural adhesive layers are provided between the U-shaped steel hoop plate at the bottom of the beam and the beam being reinforced, between the U-shaped steel hoop plate of the frame column and the frame column, and between the pressure strip and the beam being reinforced.

5. The beam-column joint reinforcement structure according to claim 1, characterized in that: All bolts are chemical bolts.

6. The beam-column joint reinforcement structure according to claim 1, characterized in that: The spacing between the chemical bolts used to fix the steel plate and the edge of the steel plate shall be ≥25mm.

7. The beam-column joint reinforcement structure according to claim 6, characterized in that: The dense zone of the U-shaped steel hoop plate at the bottom of the beam is twice the beam height, with at least 4 U-shaped steel hoop plates evenly distributed and fixed by M8 chemical bolts. The distance between the U-shaped steel hoop plate at the bottom of the beam and the root of the frame column is ≥25mm, and the steel hoop thickness is ≥4mm.

8. The beam-column joint reinforcement structure according to claim 1, characterized in that: The L-shaped steel plate has a beam end length ≥1000mm, a column end length ≥600mm, and a steel plate thickness ≥4mm.

9. The beam-column joint reinforcement structure according to claim 1, characterized in that: The steel plate, starting from the beam support of the reinforced beam, has an overall length ≥ one-third of the beam span length and a thickness ≥ 4mm.

10. The beam-column joint reinforcement structure according to claim 1, characterized in that: The metal strip that accompanies the U-shaped steel hoop at the bottom of the beam is an integral strip, and the width of the metal strip is ≥100mm and the thickness is ≥3mm.

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