Connecting structure of newly-added beam and existing column

Abstract

The utility model discloses a connecting structure of a newly-added beam and an existing column, and belongs to the field of engineering transformation. Aiming at the problems of high cost and poor stability of the existing beam column connection, the utility model provides the connecting structure of the newly added beam and the existing column, which comprises support parts, the support parts are arranged on two sides of the new beam, one end of each support part is connected with the original column, and the support parts are arranged along the length direction of the original column; a space formed by the two supporting parts comprises a beam area and a beam-free area, the two supporting parts corresponding to the beam-free area are connected through a first connecting piece, and the two ends of the first connecting piece are directly connected with the two supporting parts respectively; the two supporting parts corresponding to the beam area are connected through a second connecting piece, one end of the second connecting piece is directly connected with the supporting parts, the other end of the second connecting piece is connected with a connecting steel plate, and the connecting steel plate is arranged between the new beam and the original column. According to the utility model, the supporting part and the connecting piece form the encryption area, so that the stress concentration under the action of external force such as earthquake can be dispersed and resisted, and the stability of the whole structure is ensured; meanwhile, the connecting steel plate between the new beam and the original column and the second connecting piece form a whole, so that the integrity and the stability of the whole structure are further ensured; the structure is simple, construction is convenient and cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering transformation, and more specifically, relates to a connection structure between a newly added beam and an existing column. Background Art

[0002] In the prior art, during building reconstruction and expansion, it is often encountered that a newly added steel beam is connected to an existing concrete column. The current conventional method is as follows: First, chisel off the plaster layer in the area where the side of the existing concrete column is connected to the steel beam, then drill holes on the side of the concrete column, set vertical connecting steel plates, implant anchor bolts, fill the gap between the steel plate and the concrete surface with glue, and then connect the steel beam and the steel plate by bolts or welding. However, when the newly added steel beam is located outside the stirrup encryption area of the column body, the connection between the steel beam and the column is prone to damage under the action of earthquake or other external forces. How to reinforce the core area range formed by the connection between the newly added steel beam and the column is a problem to be solved in the prior art.

[0003] Corresponding improvements have also been made to the above problems. For example, Chinese Patent Application No. CN202021992072.6, with a publication date of May 28, 2021, discloses a beam-column reinforcement structure based on concrete rebar planting technology, which relates to the field of beam-column reinforcement. It includes two outer steel plates arranged on both sides of the original column where the newly added beam is connected. The cross-section of the outer steel plate is U-shaped and the opening direction points to the axis of the original column. The newly added beam penetrates through the outer steel plate, and there are rebar implants horizontally implanted into the original column through the outer steel plate. There is a structural adhesive layer between the outer steel plate and the original column, and there is also a structural adhesive layer between the rebar implant and the original column. The disadvantage of this patent is that the construction is cumbersome and the cycle is long.

[0004] Another example is Chinese Patent Application No. CN201621454368.6, with a publication date of August 4, 2017. This patent discloses a hoop connection node between a newly added steel beam and an original reinforced concrete column, including the original reinforced concrete column, the newly added steel beam, and a connection member arranged on the connection part of the original reinforced concrete column connected to the newly added steel beam. The connection member includes an inner hoop fixed on the outer periphery of the original reinforced concrete column, a steel bar framework implanted in the connection part, an outer hoop fixed on the outer periphery of the steel bar framework, and a hoop inner concrete structure poured between the outer hoop and the side wall of the original reinforced concrete column; the inner hoop is respectively sleeved on the upper end and the lower end of the connection part, and the inner hoop is a horizontally arranged cross-shaped frame; the steel bar framework is composed of longitudinally arranged layered anchoring steel bars; the inner side wall of the outer hoop is welded and fixed to the outer ends of the anchoring steel bars and the outer ends of the inner hoop; the newly added steel beam is vertically fixed to the side wall of the outer hoop. The disadvantage of this patent is that although it can form an integral core node with the original structure, there are construction difficulties in implanting it into the original column. Content of the Utility Model

[0005] 1. Problems to be Solved

[0006] In view of the problems of high cost and poor stability in the existing beam-column connections, the utility model provides a connection structure for a newly added beam and an existing column. By forming an overall densified area with the support part and the connecting piece, the utility model helps to disperse and resist stress concentration under external forces such as earthquakes, thus ensuring the stability of the whole structure; at the same time, the connecting steel plate between the new beam and the original column and the second connecting piece form a whole, further ensuring the integrity and stability of the whole structure; it has a simple composition, convenient construction and low cost.

[0007] 2. Technical Solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A connection structure for a newly added beam and an existing column includes a support part. The support part is arranged on both sides of the new beam. One end of the support part is connected to the original column and the support part is arranged along the length direction of the original column; the space formed by the two support parts includes a beam area and a beamless area. The two support parts corresponding to the beamless area are connected by a first connecting piece, and both ends of the first connecting piece are directly connected to the two support parts respectively; the two support parts corresponding to the beam area are connected by a second connecting piece. One end of the second connecting piece is directly connected to the support part, and the other end is connected to a connecting steel plate, and the connecting steel plate is arranged between the new beam and the original column.

[0010] Furthermore, the first connecting piece is a connecting plate, and the two support parts corresponding to the beamless area are connected by a plurality of connecting plates arranged in parallel at equal intervals; the second connecting piece is a reinforcing plate, and the two support parts corresponding to the beam area are connected by a plurality of reinforcing plates arranged in parallel at equal intervals.

[0011] Furthermore, the connecting plate is a batten plate, and the batten plate is directly welded to the support part; and the width of the batten plate is 90 - 110 mm and the thickness is 4 - 6 mm.

[0012] Furthermore, the distance between two adjacent connecting plates is 90 - 110 mm.

[0013] Furthermore, the support part is an angle steel, and the two sides of the angle steel are respectively attached to the two sides of the vertex in the original column.

[0014] Furthermore, structural adhesive is filled between the angle steel and the original column, and structural adhesive is filled between the second connecting piece and the connecting steel plate.

[0015] Furthermore, adjacent first connecting pieces and adjacent second connecting pieces are all connected by reinforcing ribs.

[0016] 3. Beneficial Effects

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] (1) The utility model sets support parts on both sides of the new beam, and the two support parts are connected by a connecting piece. The synergistic effect between the support part and the connecting piece makes the connection area between the new beam and the original column become a closely connected integral encryption area, making the connection between the newly added beam and the original column more stable, effectively preventing the beam from having excessive displacement or overturning when subjected to vertical or horizontal loads; and it helps to disperse and resist stress concentration under external forces such as earthquakes, thus ensuring the stability of the entire structure; at the same time, the connection steel plate between the new beam and the original column forms an integral with the second connecting piece, further ensuring the integrity and stability of the entire structure; the composition of the entire connection structure is simple, the construction is convenient and the cost is low;

[0019] (2) Both the first connecting piece and the second connecting piece in the utility model are made of steel. The connecting pieces made of steel have relatively high strength and stiffness themselves, can provide rigid connection, help to maintain the integrity of the structure when stressed, and prevent the failure of the overall structure due to local damage; and the first connecting piece and the second connecting piece are arranged in parallel at equal intervals, can evenly transfer the load, effectively disperse the load on the newly added beam to the original column, reduce the stress concentration phenomenon, and improve the bearing capacity of the structure; and reduce the construction difficulty and error rate;

[0020] (3) The utility model uses gusset plates as connecting plates, and their processing and installation are relatively simple and fast. Moreover, the size and shape of the gusset plates can be customized and adjusted according to the actual situation to meet the needs of different structures; and the width and thickness of the gusset plates are limited to optimize their mechanical properties. Appropriate width and thickness can ensure that the gusset plates can transfer sufficient load and maintain their own stability when stressed. At the same time, through reasonable size design, material waste and cost increase can be reduced; the distance between adjacent two connecting pieces is limited, making it convenient for construction while ensuring that the overall stability is not damaged;

[0021] (4) The utility model uses angle steel as the support part, which has high strength, good stiffness, is relatively economical and has low cost; and the two sides of the angle steel are attached to the two sides of the vertex of the original column, increasing the contact area, making the connection between the support part and the original column closer, thus improving the overall stability and seismic performance of the structure, and at the same time having a certain aesthetic property; the setting of structural adhesive and reinforcing ribs further strengthens the connection strength between components, thus further strengthening the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the top view of the utility model;

[0023] Figure 2 is the front view of the utility model.

[0024] In the figure: 1. original column; 2. new beam; 3. angle steel; 4. reinforcement plate; 5. structural adhesive; 6. connecting plate. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with specific embodiments and drawings.

[0026] The cross-sections of the beams and columns involved below are all rectangular. The original column 1 is arranged in the vertical direction and plays a load-bearing role. The new beam 2 is arranged in the horizontal direction and is arranged on the side of the original column 1.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, a connection structure between a newly added beam and an existing column includes a support portion, and the support portion is arranged on both sides of the new beam 2. What is explained here is that the two support portions are arranged on both sides of the new beam 2 along the length direction (i.e., the horizontal direction) of the new beam 2; one end of the support portion is connected to the original column 1 and the support portion is arranged along the length direction of the original column 1. The space formed by the two supporting parts includes a beam area and a beamless area. The length of the supporting part is usually longer, and the height of the end of the supporting part that is not connected to the original column 1 from the ground is less than the height of the end of the new beam 2 from the ground. Therefore, there will be a new beam 2 in the space formed by the two supporting parts. The area with the new beam 2 is called the beam area, and the area without the new beam 2 is called the beamless area; the two supporting parts corresponding to the beamless area are connected by a first connecting piece, and the two ends of the first connecting piece are directly connected to the two supporting parts respectively, that is, specifically, one end of the first connecting piece is directly welded to one supporting part; the other end of the first connecting piece is directly welded to the other supporting part, and an H-shaped structure is formed between one connecting piece and the two supporting parts; the two supporting parts corresponding to the beam area are connected by a second connecting piece, and one end of the second connecting piece is directly connected to the supporting part, and the other end is connected to the connecting steel plate, and the connecting steel plate is arranged between the new beam 2 and the original column 1. It should be noted here that because there is a new beam 2 in the beam area, directly connecting the second connecting piece to the two supporting parts respectively will cause interference with the new beam 2, causing construction difficulties. Therefore, a connecting steel plate is used as an intermediate part, so that the two ends of the second connecting part are respectively connected to the supporting part and the connecting steel plate, and the stability and strength of the connecting steel plate are enhanced, so that the connection between the original column 1 and the new beam 2 is more stable, because the connecting steel plate is the connecting receiving part between the original column 1 and the new beam 2. The second connecting part is composed of two connecting components, one end of one connecting component is connected to a supporting part, and the other end is connected to one end of the connecting steel plate; one end of the other connecting component is connected to another supporting part, and the other end is connected to the other end of the connecting steel plate.

[0029] Specifically, in this embodiment, one end of the supporting part is connected to the top of the original column 1, and the other end extends along the length direction of the original column 1. Connecting one end of the supporting part to the top of the original column 1 effectively ensures the connection stability with the original column 1. Compared with connecting the supporting part to the middle section of the original column 1, the top connection can reduce the stress concentration phenomenon in the middle section of the original column 1 because the top connection makes the load distribution more uniform, avoiding structural damage caused by excessive local stress. And the top of the original column 1 is usually one of the key parts of the structure, and its stability and safety are crucial to the entire structure. By connecting the supporting part to the top, the protection of this key part can be further strengthened to prevent it from being severely damaged during an earthquake.

[0030] In the utility model, by arranging supporting parts on both sides of the new beam 2 and connecting the two supporting parts through a connecting piece, the synergistic effect between the supporting part and the connecting piece makes the connection area between the new beam 2 and the original column 1 a tightly connected overall encryption area, making the connection between the new beam 2 and the original column 1 more stable, effectively preventing the new beam 2 from having excessive displacement or overturning when subjected to vertical or horizontal loads; and it helps to disperse and resist stress concentration under external forces such as earthquakes, thus ensuring the stability of the entire structure; at the same time, the connection steel plate between the new beam 2 and the original column 1 forms a whole with the second connecting piece, further ensuring the integrity and stability of the entire structure; the composition of the entire connection structure is simple, the construction is convenient and the cost is low.

[0031] In a specific embodiment, the first connecting piece is a connecting plate 6, and the two supporting parts corresponding to the beamless area are connected by a plurality of connecting plates 6 arranged in parallel at equal intervals; the second connecting piece is a reinforcing plate 4, and the two supporting parts corresponding to the beam area are connected by a plurality of reinforcing plates 4 arranged in parallel at equal intervals. Both the connecting plate 6 and the reinforcing plate 4 are made of steel. The connecting pieces made of steel have relatively high self-strength and stiffness, can provide rigid connection, help to maintain the integrity of the structure when stressed, and prevent the failure of the overall structure caused by local damage; and the first connecting piece and the second connecting piece are arranged in parallel at equal intervals, which can evenly transfer the load, effectively disperse the load on the new beam 2 to the original column 1, reduce the stress concentration phenomenon, and improve the load-bearing capacity of the structure; and the equal-interval setting also reduces the construction difficulty and error rate, thereby improving the construction efficiency.

[0032] In a specific embodiment, the connecting plate 6 is a lacing plate, and the lacing plate is directly welded to the supporting part. The two ends of the lacing plate are directly welded to the supporting parts on both sides of the new beam 2 respectively. Welding can ensure the stability of the connection, and the lacing plate is relatively simple and fast to process and install. Moreover, the size and shape of the lacing plate can be customized and adjusted according to the actual situation to meet the requirements of different structures. At the same time, in this embodiment, the width of the lacing plate is 90 - 110 mm, and the thickness is 4 - 6 mm. An overly wide lacing plate may increase the self-weight and cost, while an overly narrow lacing plate may not be able to bear enough load, resulting in structural failure. Similarly, an overly thick lacing plate may waste materials, while an overly thin lacing plate may not meet the strength and stiffness requirements. Therefore, a suitable width and thickness are selected to balance performance and cost. Specifically, in this embodiment, the width of the lacing plate is 100 mm, and the thickness is 5 mm.

[0033] And the distance between two adjacent connecting plates 6 is 90 - 110 mm, making the arrangement of the connecting plates 6 relatively dense, thereby enhancing the stability of the overall structure. Specifically, in this embodiment, the distance between two adjacent connecting plates 6 is 100 mm.

[0034] In a specific embodiment, the supporting part is an angle steel 3. The angle steel 3 has high strength and good stiffness, is relatively economical, and has low cost. Moreover, the two sides of the angle steel 3 are respectively attached to the two sides of the vertex in the original column 1, which increases the contact area between the angle steel 3 and the original column 1, thereby enhancing the tightness and stability of the connection between the supporting part and the original column 1. At the same time, the angle steel 3 helps to increase the ductility of the structure, that is, the structure can undergo large plastic deformation when stressed without immediate failure, which helps the structure to maintain better stability and survivability during an earthquake.

[0035] More importantly, during on-site renovation, the number of new beams 2 is not unique. That is, new beams 2 may be added on one side, two sides, three sides, or four sides of the original column 1. When new beams 2 are added on at least two sides of the original column 1, using the angle steel 3 as the supporting part can reduce the number of supporting parts. Since the two sides of the angle steel 3 are attached to the two sides of the corresponding vertex in the original column 1, only four angle steels 43 are needed at the four vertices of the original column 1 to add new beams 2 on all four sides of the original column 1, thereby reducing the number of supporting parts, saving costs, improving the construction progress, and accelerating the construction efficiency.

[0036] In a specific embodiment, structural adhesive 5 is filled between the angle steel 3 and the original column 1, and structural adhesive 5 is also filled between the second connecting member and the connecting steel plate; the structural adhesive 5 has extremely high bonding strength and can withstand large shear forces, peeling forces and tensile forces, ensuring the reliability of the connection; and after curing, the structural adhesive 5 can form a dense adhesive layer, effectively preventing the penetration of moisture, gas and corrosive substances, and protecting the bonded materials from the influence of the external environment; therefore, in this embodiment, structural adhesive 5 is filled at all joints, further ensuring the connection stability between the connecting components and increasing the strength of the overall structure.

[0037] And in this embodiment, adjacent two first connecting members and adjacent two second connecting members are all connected by reinforcing ribs, and the arrangement of the reinforcing ribs further ensures the connection stability between adjacent two connecting members and enhances the seismic resistance of the whole structure at the same time.

[0038] The embodiments described in the present utility model are only descriptions of the preferred embodiments of the present utility model, and do not limit the concept and scope of the present utility model. Without departing from the design idea of the present utility model, various deformations and improvements made by those skilled in the art to the technical solutions of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A connecting structure between a newly added beam and an existing column, characterized in that: It includes a support part which is arranged on both sides of the new beam (2). One end of the support part is connected to the original column (1) and the support part is arranged along the length direction of the original column (1). The space formed by the two support parts includes a beam area and a beamless area. The two support parts corresponding to the beamless area are connected by a first connecting piece, and both ends of the first connecting piece are directly connected to the two support parts respectively. The two support parts corresponding to the beam area are connected by a second connecting piece. One end of the second connecting piece is directly connected to the support part, and the other end is connected to a connecting steel plate which is arranged between the new beam (2) and the original column (1).

2. The connecting structure of the newly added beam and the existing column according to claim 1, characterized in that: The first connecting piece is a connecting plate (6), and the two support parts corresponding to the beamless area are connected by a plurality of connecting plates (6) arranged in parallel at equal intervals. The second connecting piece is a reinforcing plate (4), and the two support parts corresponding to the beam area are connected by a plurality of reinforcing plates (4) arranged in parallel at equal intervals.

3. The connecting structure between the newly added beam and the existing column according to claim 2, characterized in that: The connecting plate (6) is a batten plate which is directly welded to the support part. The width of the batten plate is 90 - 110 mm and the thickness is 4 - 6 mm.

4. A connecting structure between a newly added beam and an existing column according to claim 2 or 3, characterized in that: The distance between two adjacent connecting plates (6) is 90 - 110 mm.

5. A connecting structure between a newly added beam and an existing column according to claim 1 or 2, characterized in that: The support part is an angle steel (3), and the two sides of the angle steel (3) are respectively attached to the two sides of the vertex in the original column (1).

6. The connection structure between the newly added beam and the existing column according to claim 5, characterized in that: Structural adhesive (5) is filled between the angle steel (3) and the original column (1), and structural adhesive (5) is filled between the second connecting piece and the connecting steel plate.

7. A connecting structure between a newly added beam and an existing column according to claim 1, characterized in that: Adjacent first connecting pieces and adjacent second connecting pieces are both connected by reinforcing ribs.

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