A reinforcement joint structure around an opening in the shear wall of an existing building

Abstract

This utility model discloses a reinforcement node structure for the perimeter of an opening in the shear wall of an existing building, belonging to the field of structural engineering technology. It includes the original shear wall, original floor slab, newly added concrete layer, equivalent through-wall bolts, structural adhesive, flat steel, angle steel, carbon fiber cloth, connecting plates, the newly added shear wall opening, and the original shear wall reinforcement. The original structural wall, slab, etc., are integrally cast. The newly added shear wall opening is demolished using non-destructive static demolition, with positioning dimensions based on the building's dimensions. After demolition, the original wall reinforcement is welded and anchored. The cross-section of the newly added steel structure is determined by calculation. The equivalent through-wall bolts pass through the original structural wall. This utility model illustrates a reinforcement method for the perimeter of an existing building with a newly added shear wall opening due to a change in building function. This method effectively reinforces and strengthens the shear wall weakened by the opening, with high construction efficiency, reliable nodes, minimal impact on the building, achieving the expected reinforcement goal, and effectively improving the structure's seismic performance.

Description

Technical Field

[0001] This utility model relates to the field of structural engineering technology, specifically a reinforcement node structure around an opening in the shear wall of an existing building. Background Technology

[0002] Reinforcing the surrounding openings after the demolition of shear wall segments to meet the requirements of use and seismic safety is of great practical significance.

[0003] Existing design drawings only cover reinforcement methods for newly added openings smaller than 1.2 meters. For openings larger than 1.2 meters, there is a lack of specific methods. Therefore, those skilled in the art provide a reinforcement node structure for the perimeter of openings in existing building shear walls to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a reinforcement node structure around the opening in the shear wall of an existing building, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A reinforcement structure for the perimeter of an opening in the shear wall of an existing building includes the original shear wall, the original floor slab, a newly added concrete layer, equivalent through-wall bolts, structural adhesive, flat steel, angle steel, carbon fiber cloth, gusset plates, the newly added shear wall opening, the original shear wall reinforcement, and equivalent through-plate bolts. The original shear wall and the original floor slab are integrally cast. The original shear wall reinforcement in the newly added concrete layer is welded and anchored with welded ends. The concrete layer can be cast using inorganic grout. The equivalent through-wall bolts and equivalent through-plate bolts pass through the flat steel or angle steel and the original shear wall and the original floor slab. Structural adhesive is injected into the holes. After the bolts pass through the wall, they are tightened and welded securely. The strength parameters of the newly added steel components and concrete are determined by calculation and meet the structural requirements. The concrete strength is at least one strength grade higher than the original concrete.

[0007] As a further improvement of this utility model: the flat steel and angle steel are connected to the original shear wall and the original floor slab by pressure grouting, and the equivalent through-wall bolts are connected to the original concrete by rebar installation, with structural adhesive injected into the rebar holes.

[0008] As a further improvement of this utility model: the positioning and size of the newly added shear wall opening are determined according to the building requirements and set according to the actual project.

[0009] As a further improvement of this utility model: the positioning and size of the newly added shear wall opening are determined according to the building requirements and set according to the actual project.

[0010] As a further improvement of this utility model: the connecting plate is welded to the flat steel and angle steel using full penetration bevel welding with equal strength. The carbon fiber cloth is a U-shaped fiber cloth hoop at the upper part of the newly added shear wall opening.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The existing building shear wall opening reinforcement node structure uses steel bonding to reinforce the area around the newly added shear wall opening. It has the advantages of short construction period, simple and reasonable structural design, high construction efficiency, small impact on the building, and achieving the expected reinforcement design goal. This equipment can be applied to the reinforcement of the area around the opening of existing frame shear walls and shear wall structure systems. Attached Figure Description

[0013] Figure 1 A schematic diagram of a reinforcement joint structure around an opening in the shear wall of an existing building;

[0014] Figure 2 This is a cross-sectional view of point A in a reinforcement node structure around an opening in the shear wall of an existing building.

[0015] Figure 3 This is a cross-sectional view of point B in a reinforcement node structure around an opening in the shear wall of an existing building.

[0016] In the diagram: 1. Original shear wall; 2. Original floor slab; 3. Newly added concrete layer; 4. Equivalent through-wall tie rod; 5. Structural adhesive; 6. Flat steel; 7. Angle steel; 8. Carbon fiber cloth; 9. Connecting plate; 10. Newly added shear wall opening; 11. Original shear wall reinforcement; 12. Equivalent through-slab tie rod. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Please see Figures 1-3 In this embodiment of the utility model, a reinforcement node structure around an opening in an existing building shear wall includes: 1. original shear wall, 2. original floor slab, 3. newly added concrete layer, 4. equivalent through-wall bolts, 5. structural adhesive, 6. flat steel, 7. angle steel, 8. carbon fiber cloth, 9. gusset plate, 10. newly added shear wall opening, 11. original shear wall reinforcement, 12. equivalent through-plate bolts.

[0020] Based on the building conditions, a non-destructive static method was used to open a hole in the original shear wall 1, creating a new shear wall opening 10. The original shear wall reinforcement 11 was left with its ends welded and anchored, and a new concrete layer 3 was poured.

[0021] The flat steel 6 and angle steel 7 around the opening of the shear wall are pasted together. The lacing plate 9 is welded to the flat steel 6 and angle steel 7 with full penetration bevel and equal strength. The longitudinal and transverse angle steel 7 are welded together.

[0022] Equivalent through-wall bolts 4 and equivalent through-plate bolts 12 pass through flat steel 6 or angle steel 7 and the original shear wall 1 or original floor slab 2. Structural adhesive 5 is injected into the holes. After the bolts pass through the wall, they are tightened and welded firmly. Structural adhesive 5 should be pressure-injected into the gaps between steel components such as angle steel 7 and connecting plates 9 and the original structure.

[0023] For the shear wall above the opening, U-shaped carbon fiber cloth 8 is pasted on, and flat steel 6 is installed along the length of the opening.

[0024] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reinforcement node structure for the perimeter of an opening in the shear wall of an existing building, comprising the original shear wall (1), the original floor slab (2), a newly added concrete layer (3), equivalent through-wall bolts (4), structural adhesive (5), flat steel (6), angle steel (7), carbon fiber cloth (8), gusset plate (9), the newly added shear wall opening (10), the original shear wall reinforcement (11), and equivalent through-slab bolts (12), characterized in that, The original shear wall (1) and the original floor slab (2) are integrally cast. The original shear wall reinforcement (11) of the newly added concrete layer (3) is welded and anchored. The concrete layer can be cast using inorganic grout. The equivalent through-wall bolt (4) and equivalent through-slab bolt (12) pass through the flat steel (6) or angle steel (7) and the original shear wall (1) and the original floor slab (2). Structural adhesive (5) is injected into the hole. After the bolt passes through the wall, it is tightened and welded firmly. The strength parameters of the newly added steel components and concrete are determined according to the calculation and meet the structural requirements. The concrete strength is at least one strength grade higher than the original concrete.

2. The reinforcement node structure around the opening in the shear wall of an existing building according to claim 1, characterized in that, The flat steel (6), angle steel (7) are pressure-injected with the original shear wall (1) and original floor slab (2) of the original structure. The equivalent through-wall bolts (4) are connected to the original concrete by rebar installation. Structural adhesive (5) is injected into the rebar holes.

3. The reinforcement node structure around the opening in the shear wall of an existing building according to claim 1, characterized in that, The location and size of the newly added shear wall opening (10) are determined according to the building requirements and are set according to the actual project.

4. The reinforcement node structure around the opening in the shear wall of an existing building according to claim 1, characterized in that, The gusset plate (9) is welded to the flat steel (6) and angle steel (7) with full penetration bevel welding of equal strength; the carbon fiber cloth (8) is the U-shaped fiber cloth hoop on the upper part of the newly added shear wall opening (10).

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