Reinforcing structure of slab column node in flat slab floor

Abstract

The utility model relates to the technical field of building reinforcing structures, in particular to a reinforcing structure of a slab-column node in a flat slab, which comprises a floor slab, a column cap fixedly connected to the bottom of the floor slab, a column body fixedly connected to the bottom of the column cap, an angle steel frame sleeved on the surface of the column cap, a force transmission steel plate arranged at the bottom of the angle steel frame, and a steel plate arranged on the surface of the force transmission steel plate. Force transmission angle steel is arranged at the bottom of the force transmission steel plate, angle steel supporting rods are arranged at the four corners of the column body, hoop plates are fixedly connected to the surfaces of the angle steel supporting rods, and structural adhesive is arranged between the angle steel frame and a floor slab. The structure is not only suitable for common structure reinforcing engineering, but also capable of meeting the requirement of civil air defense engineering for time urgency in peacetime and wartime function conversion, the structure does not need to be unloaded in advance when reinforcing is carried out, construction is simplified, construction efficiency is improved, punching bearing capacity at the position of the column cap can be improved, and construction cost is reduced. And the overall bearing capacity of the structure is also remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of building reinforcement structure technology, specifically a reinforcement structure for slab-column joints in a flat slab floor system. Background Technology

[0002] The conversion of civil defense basements from peacetime to wartime functions is an important part of my country's civil defense engineering construction. Realizing the conversion of underground projects such as underground garages and underground commercial streets from peacetime to wartime functions has undoubtedly become the best choice for civil defense engineering construction. The significance of the emergency conversion of ordinary basements from peacetime to wartime functions is: (1) it can ensure both peacetime use and wartime preparedness; (2) it can make reasonable use of underground space and save land resources; (3) it can save on the maintenance and management costs of civil defense equipment. The pre-war reinforcement of the slab-column joints of the flat slab structure system is the reinforcement of the main structure in the conversion of civil defense engineering from peacetime to wartime functions, and it is the most important part of the conversion project.

[0003] There are several relatively mature reinforcement methods for concrete frame structures, including cross-section enlargement reinforcement, concrete replacement reinforcement, external prestressing reinforcement, external steel reinforcement, steel plate bonding reinforcement, fiber composite material bonding reinforcement, prestressed carbon fiber composite plate reinforcement, additional guide reinforcement, pre-tensioned steel wire rope mesh-polymer mortar surface layer reinforcement, and wire wrapping reinforcement. However, the existing reinforcement method for flat slab systems involves pouring a new layer of reinforced concrete on the outside of the column cap. This construction process is cumbersome and time-consuming. This method is difficult to meet the urgent need for pre-war reinforcement when converting ordinary basements for peacetime and wartime functions.

[0004] To address the aforementioned technical issues, it is essential to design a reinforcement structure for the slab-column joint in a flat slab floor system. Utility Model Content

[0005] The purpose of this utility model is to provide a reinforcement structure for the slab-column joint in a flat slab floor system. It is applicable to ordinary structural reinforcement projects and can also meet the advantages of rapid assembly for civil defense projects during peacetime-wartime functional conversion. It solves the problems of traditional reinforcement structures having a cumbersome construction process, taking a long time, and being unable to meet the pre-war reinforcement assembly requirements for ordinary basements during peacetime-wartime functional conversion.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a reinforcement structure for slab-column joints in a flat slab floor system, comprising a floor slab, a column cap fixedly connected to the bottom of the floor slab, a column body fixedly connected to the bottom of the column cap, an angle steel frame fitted on the surface of the column cap, a force-transmitting steel plate provided at the bottom of the angle steel frame, a force-transmitting angle steel provided at the bottom of the force-transmitting steel plate, angle steel struts provided at the four corners of the column body, and a hoop plate fixedly connected to the surface of the angle steel strut.

[0007] Preferably, structural adhesive is provided between the angle steel frame and the floor slab, with the bottom of the structural adhesive bonded to the angle steel frame and the top of the structural adhesive bonded to the floor slab, and the structural adhesive is made of epoxy resin.

[0008] Preferably, the bottom of the force-transmitting angle steel is provided with a force-transmitting top plate, and multiple force-transmitting top plates are wrapped around the surface of the column.

[0009] Preferably, the surface of the angle steel strut is fixedly connected with a reinforcing steel plate, and multiple reinforcing steel plates are wrapped around the surface of the column. Tool-type tension bolts are provided through the surface of the reinforcing steel plates.

[0010] Preferably, the force-transmitting angle steel and the force-transmitting top plate are divided into two groups, and the two groups of force-transmitting angle steel and the force-transmitting top plate are located at the top and bottom of the column, respectively.

[0011] Preferably, mounting bolts are installed through the surface of the force-transmitting top plate, and the force-transmitting top plate is fixedly connected to the force-transmitting angle steel by the mounting bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model is not only applicable to ordinary structural reinforcement projects, but also meets the time urgency requirements of civil defense projects in the conversion of peacetime and wartime functions. When implementing reinforcement, there is no need to unload the structure in advance, which simplifies construction and improves construction efficiency. It can not only improve the punching shear bearing capacity at the column cap, but also significantly improve the overall bearing capacity of the structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the angle steel frame of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the hoop plate and angle steel strut of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of the present invention before prestressing is applied;

[0017] Figure 4 This is a schematic diagram of the overall structure of the present invention after prestressing is applied;

[0018] Figure 5 This is a partial structural diagram of the force-transmitting angle steel and force-transmitting top plate of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the present invention.

[0020] In the diagram: 1. Floor slab; 2. Column cap; 3. Column body; 4. Angle steel frame; 5. Force transmission steel plate; 6. Force transmission angle steel; 7. Force transmission top plate; 8. Hoop plate; 9. Angle steel strut; 10. Reinforcing steel plate; 11. Mounting bolt; 12. Tool-type tension bolt; 13. Structural adhesive. Detailed Implementation

[0021] Please see Figures 1-6 A reinforcement structure for the slab-column joint in a flat slab floor includes a floor slab 1, a column cap 2 fixedly connected to the bottom of the floor slab 1, a column body 3 fixedly connected to the bottom of the column cap 2, an angle steel frame 4 fitted on the surface of the column cap 2, a force-transmitting steel plate 5 at the bottom of the angle steel frame 4, a force-transmitting angle steel 6 at the bottom of the force-transmitting steel plate 5, angle steel struts 9 at the four corners of the column body 3, and hoop plates 8 fixedly connected to the surface of the angle steel struts 9. By setting the angle steel frame 4, the force-transmitting steel plate 5, the force-transmitting angle steel 6, the angle steel struts 9, and the hoop plates 8, a stable support can be provided between the column body 3 and the floor slab 1, greatly improving the stability of the column body 3 support, preventing the column body 3 from shaking or tilting when subjected to external forces, and improving the seismic performance of the column body 3. During the assembly process, there is no need to unload the structure in advance, simplifying construction and improving construction efficiency.

[0022] Please see Figure 3 Structural adhesive 13 is provided between the angle steel frame 4 and the floor slab 1. The bottom of the structural adhesive 13 is bonded to the angle steel frame 4, and the top of the structural adhesive 13 is bonded to the floor slab 1. The structural adhesive 13 is made of epoxy resin. By providing structural adhesive 13, the floor slab 1 and the angle steel frame 4 can be firmly bonded together, and the connection is stable.

[0023] Please see Figure 3 The bottom of the force-transmitting angle steel 6 is provided with a force-transmitting top plate 7. Multiple force-transmitting top plates 7 are wrapped around the surface of the column body 3. By setting the force-transmitting top plates 7, the angle steel strut 9 is reinforced and connected, thereby improving the stability of the angle steel strut 9.

[0024] Please see Figure 4 A reinforcing steel plate 10 is fixedly connected to the surface of the angle steel strut 9. Multiple reinforcing steel plates 10 are wrapped around the surface of the column body 3. Tool-type tension bolts 12 are installed through the surface of the reinforcing steel plates 10. By setting the reinforcing steel plates 10, the angle steel strut 9 is reinforced and its stability is enhanced. By setting the tool-type tension bolts 12, prestress is applied to the angle steel strut 9 to tension and support the upper and lower sets of force-transmitting angle steels 6.

[0025] Please see Figure 4 The force-transmitting angle steel 6 and the force-transmitting top plate 7 are divided into two groups. The two groups of force-transmitting angle steel 6 and force-transmitting top plate 7 are located at the top and bottom of the column body 3, respectively. By setting the force-transmitting angle steel 6 and the force-transmitting top plate 7, the top and bottom of the column body 3 are reinforced and supported, thereby improving the stability of the column body 3.

[0026] Please see Figure 3 The surface of the force transmission top plate 7 is permeated with mounting bolts 11, and the force transmission top plate 7 is fixedly connected to the force transmission angle steel 6 by the mounting bolts 11. The mounting bolts 11 facilitate the assembly and installation of the force transmission top plate 7 and the force transmission angle steel 6.

[0027] In peacetime, angle steel and steel plates should be installed in advance as follows: Figure 1 , Figure 2 The structure is reinforced by welding angle steel frames 4, angle steel struts 9, and hoop plates 8. During pre-battle reinforcement, the angle steel frames 4, with welded top steel plates, are adhered to the lower surface of the floor slab 1 around the column cap 2 using structural adhesive 13 epoxy resin. The four angle steel frames 4 are then welded together. Appropriately sized grooves are chiseled into the column body 3 at the locations where the force-transmitting angle steel 6 will be placed. The force-transmitting angle steel 6 in the four directions is then installed using structural adhesive 13 epoxy resin. Figure 5 Adhere it to the groove in the following manner. Figure 2 The angle steel struts 9 and the hoop plates 8 reinforce the structure in the left and right directions of the column body 3. Figure 3 To fix it in this way, first tighten the mounting bolts 11 at both ends, then tighten the tool-type tension bolts 12 to apply prestress to the angle steel strut 9, and then... Figure 4 The method involves welding the angle steel struts 9 together with the hoop plates 8 and reinforcing steel plates 10 in the front and rear directions of the column body 3. Finally, the force transmission top plate 7 is welded to the force transmission angle steel 6, and the force transmission angle steel 6 is welded to the force transmission steel plate 5 at the lower end of the angle steel frame 4.

[0028] In summary, the reinforcement structure for the slab-column joint in this flat slab floor system, through the use of angle steel frame 4, force-transmitting steel plate 5, force-transmitting angle steel 6, force-transmitting top plate 7, hoop plate 8, angle steel strut 9, reinforcing steel plate 10, mounting bolts 11, tool-type tension bolts 12, and structural adhesive 13, solves the problems of cumbersome and time-consuming construction processes in traditional reinforcement structures, and the inability to meet the pre-war reinforcement and assembly requirements for the conversion of ordinary basements to peacetime and wartime functions.

Claims

1. A reinforcement structure for slab-column joints in a flat slab floor system, comprising a floor slab (1), characterized in that: The bottom of the floor slab (1) is fixedly connected to a column cap (2), the bottom of the column cap (2) is fixedly connected to a column body (3), the surface of the column cap (2) is fitted with an angle steel frame (4), the bottom of the angle steel frame (4) is provided with a force transmission steel plate (5), the bottom of the force transmission steel plate (5) is provided with a force transmission angle steel (6), the four corners of the column body (3) are provided with angle steel struts (9), and the surface of the angle steel struts (9) is fixedly connected with a hoop plate (8).

2. The reinforcement structure for slab-column joints in a flat slab floor system according to claim 1, characterized in that: Structural adhesive (13) is provided between the angle steel frame (4) and the floor slab (1). The bottom of the structural adhesive (13) is bonded to the angle steel frame (4), and the top of the structural adhesive (13) is bonded to the floor slab (1). The material of the structural adhesive (13) is epoxy resin.

3. The reinforcement structure for slab-column joints in a flat slab floor system according to claim 1, characterized in that: The bottom of the force-transmitting angle steel (6) is provided with a force-transmitting top plate (7), and multiple force-transmitting top plates (7) are wrapped around the surface of the column body (3).

4. The reinforcement structure for slab-column joints in a flat slab floor system according to claim 1, characterized in that: The surface of the angle steel strut (9) is fixedly connected with a reinforcing steel plate (10), and multiple reinforcing steel plates (10) are wrapped around the surface of the column body (3). Tool-type tension bolts (12) are provided through the surface of the reinforcing steel plate (10).

5. The reinforcement structure for slab-column joints in a flat slab floor system according to claim 1, characterized in that: The force-transmitting angle steel (6) and the force-transmitting top plate (7) are divided into two groups, and the two groups of force-transmitting angle steel (6) and force-transmitting top plate (7) are located at the top and bottom of the column body (3), respectively.

6. The reinforcement structure for slab-column joints in a flat slab floor system according to claim 5, characterized in that: The surface of the force transmission top plate (7) is fitted with mounting bolts (11), and the force transmission top plate (7) is fixedly connected to the force transmission angle steel (6) by the mounting bolts (11).

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