Reinforcing device for beam column at deformation joint
By combining reinforcement components on the far and near sides of the expansion joint, and using connecting rods and locking devices, the beams and columns at the expansion joint are reinforced, solving the construction problem in a confined space and improving the reinforcement effect and construction stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 央固工程科技(上海)有限公司
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, the reinforcement of beams and columns at expansion joints is difficult to construct, especially in confined spaces, where effective base treatment and component installation are impossible.
A combination of far-joint side reinforcement components and near-joint side reinforcement components is used to reinforce beams or columns through connecting rods and locking devices. The connecting rods extend through the protrusion of the first connecting plate and are connected as one unit through the locking devices. No base treatment is required on the near-joint side, making it suitable for narrow construction spaces.
It reduces construction difficulty, improves reinforcement effect, and enhances the installation stability and reliability of connecting rods, making it suitable for beam and column reinforcement at expansion joints in confined construction spaces.
Smart Images
Figure CN224134285U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of building repair technology, and in particular to a reinforcement device for beams and columns at expansion joints. Background Technology
[0002] In existing building renovation projects, it is common to encounter situations where the beam and column structures on both sides of structural expansion joints need to be reinforced. Currently, the following are some common practices for beam and column reinforcement:
[0003] 1. Enlarging the cross-section for reinforcement: Beams and columns at expansion joints can be reinforced by enlarging the cross-section on one side, two sides, or three sides. This reinforcement method has two drawbacks: first, the cross-section of the component is significantly increased, affecting the building's functionality; second, the reinforcement is asymmetrical during reinforcement, resulting in uneven stress distribution and low utilization of some steel bars. Therefore, this reinforcement method is currently rarely used.
[0004] 2. Externally bonded steel reinforcement: Angle steel is externally bonded to the four corners, and then the angle steel is connected by hoops. This reinforcement method results in a relatively small increase in the cross-section of the component and is cost-effective, so it is currently widely used. However, this reinforcement method requires chiseling and grinding the original concrete base of the beam and column to install the angle steel, and the angle steel and hoops need to be welded, sealed, and grouted. Therefore, this reinforcement method is usually applied to independent beams and columns with a large working space on all sides. However, according to building standards, expansion joints usually require the adjacent installation of double beams and double columns, which results in extremely narrow space on one side of the expansion joint (generally between 100 and 200 mm), with virtually no working space, thus making construction more difficult.
[0005] 3. Carbon fiber reinforcement: Columns are reinforced with carbon fiber hoops around the perimeter, and beams are reinforced with carbon fiber or carbon fiber hoops bonded to the bottom of the beam. This reinforcement method is the same as the external steel reinforcement method. There is no construction space on the expansion joint side, the base layer cannot be ground, and it is impossible to ensure that the carbon fiber is bonded without voids. Utility Model Content
[0006] The purpose of this application is to solve the problem of difficult construction for reinforcing beams and columns at expansion joints in the prior art. Therefore, this application provides a reinforcement device for beams and columns at expansion joints, which reinforces the side near the joint through connecting rods, eliminating the need for base treatment and grouting on the side near the joint, requiring less construction space, reducing construction difficulty, and is suitable for reinforcing beams and columns at expansion joints.
[0007] This application provides a reinforcement device for beams and columns at expansion joints. The beam or column includes a near-joint side and a far-joint side. The reinforcement device includes:
[0008] A distal joint side reinforcement assembly is used to be installed on the distal joint side of the beam or column, and includes two first connecting plates, which are respectively installed on the two distal joint sides that are connected to the proximal joint side, and includes a protrusion for extending into the expansion joint.
[0009] The near-seam reinforcement assembly includes a connecting rod and a locking member, wherein the connecting rod is used to pass through the protrusions of the two first connecting plates and is connected as one unit by the locking member.
[0010] By adopting the above technical solution, the protruding parts of the two first connecting plates extend into the expansion joint, and the connecting rod passes through the protruding parts of the two first connecting plates and is connected as one unit by the locking device, thereby achieving reinforcement of the beam or column near the joint. Moreover, this method does not require base treatment or subsequent grouting on the near joint side. At the same time, the connecting rod and locking device can be installed from one side of the expansion joint, reducing the construction difficulty and making it suitable for the narrow construction space at the expansion joint.
[0011] In some embodiments, the near-joint side reinforcement assembly further includes a stiffening plate disposed at the angle between the protrusion and the near-joint side.
[0012] By adopting the above technical solution, the out-of-plane stiffness of the near-joint side is enhanced by the stiffening plate, which improves the reinforcement effect. At the same time, the strength of the protruding part of the first connecting plate is also enhanced, which improves the installation stability and reliability of the connecting rod.
[0013] In some embodiments, the connecting rod is a screw, the locking element is a nut, and the first connecting plate is a hoop plate.
[0014] In some embodiments, the far joint side reinforcement assembly further includes an angle steel, a second connecting plate, and a first reinforcement plate. The angle steel is used to be disposed at the corner of the far joint side of the beam or column, and the second connecting plate is used to connect adjacent angle steels. The first reinforcement plate is disposed corresponding to the first connecting plate and is disposed between the first connecting plate and the far joint side, and its end face is flush with the surface of the near joint side.
[0015] By adopting the above technical solution, the far side of the beam and column is reinforced by the first connecting plate, the second connecting plate, the first reinforcing plate, and the angle steel. The components are similar to those used in conventional externally bonded steel reinforcement, and the construction process is similar, which can ensure stable and reliable construction with low difficulty. At the same time, the first reinforcing plate is used to provide the foundation for the connecting plate installation on one side of the column corner near the expansion joint and enhances the out-of-plane stiffness. On the other side, the protrusion of the first connecting plate extends outward to provide the foundation for the connecting rod installation, thus taking into account the structural reinforcement of both the far side and the near side of the expansion joint.
[0016] In some embodiments, the angle steel is an equilateral angle steel, and the material and size of the first reinforcing plate are the same as the material of the angle steel and the size of its side plate.
[0017] In some embodiments, the far-joint side reinforcement assembly further includes a first anchor bolt and two second reinforcement plates. The first anchor bolt is used to reinforce the beam by penetrating the floor slab away from the expansion joint and connecting to the second connecting plate. The two second reinforcement plates are respectively disposed at the anchor bolts above the floor slab and connected to the corresponding first connecting plates, and disposed on the side of the beam near the floor slab below and connected to the corresponding second connecting plates.
[0018] By adopting the above technical solution, the far side of the beam is reinforced by the first connecting plate, the second connecting plate, the first reinforcing plate, the second reinforcing plate, the angle steel, and the first anchor bolt. The components are similar to those used in conventional externally bonded steel reinforcement, and the construction process is similar, thus ensuring stable and reliable construction with low difficulty.
[0019] In some embodiments, the distal seam side reinforcement assembly further includes a third connecting plate, the number of which is adapted to the number of distal seam side surfaces, such that the third connecting plate is sequentially connected to the two first connecting plates and covers all distal seam side surfaces.
[0020] In some embodiments, the far-joint side reinforcement assembly further includes a second anchor bolt, which, when used to reinforce the beam, penetrates the floor slab away from the expansion joint and the first connecting plate disposed above the floor slab, and is connected to the third connecting plate disposed below the floor slab.
[0021] In some embodiments, the cross-section of the beam or column is rectangular.
[0022] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description
[0023] Figure 1 A schematic diagram of a reinforcement device installed on a column, provided for this application;
[0024] Figure 2 A structural schematic diagram of a reinforcement device installed on a beam, as provided in this application;
[0025] Figure 3 A schematic diagram of another reinforcement device provided in this application installed on a column;
[0026] Figure 4 A schematic diagram of another reinforcement device provided in this application installed on a beam.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Expansion joint; 2. Column; 3. Beam; 4. Floor slab;
[0029] 10. First connecting plate;
[0030] 20. Angle steel; 21. Second connecting plate; 22. First reinforcing plate; 23. First anchor bolt; 24. Second reinforcing plate; 25. Third connecting plate; 26. Second anchor bolt;
[0031] 30. Connecting rod; 31. Locking component; 32. Stiffening plate;
[0032] 40. Joint sealant layer. Detailed Implementation
[0033] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0034] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" 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. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] In existing building renovation projects, beam and column reinforcement is frequently encountered. Conventional beams and columns have a large surrounding space, which minimizes construction obstacles and facilitates surface treatment and component installation. However, for beams and columns on both sides of structural expansion joint 1, the width of expansion joint 1 is usually 100-200mm, resulting in extremely narrow space between adjacent beams and columns. This greatly increases the difficulty of surface treatment and component installation, and can easily lead to improper construction operations, resulting in insufficient stiffness on that side after reinforcement.
[0037] The beams and columns at expansion joint 1 include the near-joint side (i.e., the side opposite to the two beams 3 or columns 2) and the far-joint side (relatively away from expansion joint 1). Taking a rectangular beam 3 or rectangular column 2 as an example, the side directly opposite to the expansion joint 1 is the near-joint side, and the other three sides are the far-joint sides. Two sides are connected to the near-joint side, and the other side is opposite to the near-joint side.
[0038] Please see Figure 1 , Figure 1 This is a schematic diagram of a reinforcement device installed on column 2, as provided in this application.
[0039] This application provides a reinforcement device for beams and columns at expansion joints, including a reinforcement component on the far side of the joint and a reinforcement component on the near side of the joint.
[0040] The distal joint reinforcement component is used to be installed on the distal joint side of the beam 3 or column 2.
[0041] The distal seam side reinforcement assembly includes two first connecting plates 10, which are respectively disposed on the two distal seam sides that are connected to the proximal seam side. The first connecting plate 10 includes a protruding portion for extending into the expansion joint 1.
[0042] The near-joint side reinforcement assembly includes a connecting rod 30 and a locking member 31. The connecting rod 30 is used to pass through the protrusions of the two first connecting plates 10 and is connected as a whole by the locking member 31. That is, the protrusions are used to install the connecting rod 30, and the end of the connecting rod 30 is fixed to the first connecting plate 10 by the locking member 31, thereby achieving near-joint side reinforcement of the beam 3 or column 2. Furthermore, this method does not require base treatment and subsequent joint filling on the near-joint side. At the same time, the connecting rod 30 and the locking member 31 can be installed from one side of the expansion joint 1, reducing the construction difficulty and making it suitable for the narrow construction space at the expansion joint 1.
[0043] In one embodiment, the near-joint side reinforcement assembly further includes a stiffening plate 32, which is disposed at the angle between the protrusion and the near-joint side. The stiffening plate 32 enhances the out-of-plane stiffness of the near-joint side, improving the reinforcement effect. It also strengthens the protrusion of the first connecting plate 10, improving the installation stability and reliability of the connecting rod 30. During construction, one side of the stiffening plate 32 is welded to the protrusion of the first connecting plate 10, and the other side is abutted against the surface of the near-joint side of the beam 3 or column 2.
[0044] In one embodiment, the connecting rod 30 is a screw, and the locking member 31 is a nut.
[0045] In one embodiment, the far-joint side reinforcement assembly further includes an angle steel 20, a second connecting plate 21, and a first reinforcement plate 22. The angle steel 20 is used to be installed at the corner of the far-joint side of the beam 3 or column 2, and the second connecting plate 21 is used to connect adjacent angle steels 20. The first reinforcement plate 22 is correspondingly arranged with the first connecting plate 10 and is used between the first connecting plate 10 and the far-joint side. Thus, the far-joint side of the beam and column is reinforced by the first connecting plate 10, the second connecting plate 21, the first reinforcement plate 22, and the angle steel 20. Its components are similar to those used in conventional externally bonded steel reinforcement, and the construction process is similar, thus ensuring stable and reliable construction with low difficulty. At the same time, the first reinforcement plate 22 is used to provide a foundation for the installation of the connecting plate and enhance out-of-plane stiffness on one side of the corner of the column 2 near the expansion joint 1, and the extension portion of the first connecting plate 10 provides a foundation for the installation of the connecting rod 30 on the other side, thus taking into account the structural reinforcement of both the far-joint side and the near-joint side.
[0046] Preferably, the end face of the first reinforcing plate 22 is flush with the surface near the seam.
[0047] In one embodiment, the angle steel 20 is an equilateral angle steel 20, and the material and size of the first reinforcing plate 22 are the same as the material of the angle steel 20 and the size of its side plate.
[0048] Please see Figure 2 , Figure 2 This is a structural schematic diagram of a reinforcement device installed on beam 3, as provided in this application.
[0049] In one embodiment, the far-joint side reinforcement assembly further includes a first anchor bolt 23 and two second reinforcement plates 24. The first anchor bolt 23 is used to reinforce the beam 3 by penetrating the floor slab 4 away from the expansion joint 1 and connecting to the second connecting plate 21. The two second reinforcement plates 24 are respectively set at the anchor bolts above the floor slab 4 and connected to the corresponding first connecting plate 10, and set on the side of the beam 3 near the floor slab 4 and connected to the corresponding second connecting plate 21. Thus, the far-joint side of the beam 3 is reinforced by the first connecting plate 10, the second connecting plate 21, the first reinforcement plate 22, the second reinforcement plate 24, the angle steel 20, and the first anchor bolt 23. Its components are similar to those used in conventional externally bonded steel reinforcement, and the construction process is similar, thereby ensuring stable and reliable construction with low difficulty.
[0050] Please see Figure 3 , Figure 3 A schematic diagram of another reinforcement device provided in this application installed on column 2.
[0051] In one embodiment, the distal seam reinforcement assembly further includes a third connecting plate 25, the number of which is adapted to the number of distal seam surfaces, such that the third connecting plate 25 is sequentially connected to the two first connecting plates 10 and covers all distal seam surfaces.
[0052] Please see Figure 4 , Figure 4 A schematic diagram of another reinforcement device provided in this application installed on beam 3.
[0053] In one embodiment, the far-joint side reinforcement assembly further includes a second anchor bolt 26, which, when used to reinforce the beam 3, penetrates the floor slab 4 away from the expansion joint 1 and the first connecting plate 10 disposed above the floor slab 4, and is connected to the third connecting plate 25 disposed below the floor slab 4.
[0054] In one embodiment, the first connecting plate 10, the second connecting plate 21, and the third connecting plate 25 can be hoop plates, and their dimensions and strength are designed according to construction requirements.
[0055] In one embodiment, the first reinforcing plate 22 and the second reinforcing plate 24 can be steel plates, and their dimensions and strength are designed according to construction requirements. Preferably, the material and dimensions of the first reinforcing plate 22 and the second reinforcing plate 24 are the same as those of the angle steel 20 and its side plate dimensions, thereby reducing the difficulty of component design.
[0056] In one embodiment, the cross-section of the beam 3 or column 2 is rectangular.
[0057] In one embodiment, the connecting rod 30 adopts a cross-sectional area * strength equal to the cross-sectional area * strength of the second connecting plate 21 installed on the far side opposite to the near seam side, thereby improving the uniformity of stress on the beam and column and further improving the processing effect.
[0058] The following explanation is based on the construction method:
[0059] A method for reinforcing beams and columns at expansion joints includes treating the base layer, installing a reinforcement device, and filling the joint. Specifically,
[0060] Handling grassroots issues:
[0061] The surface of the far joint side of beam 3 or column 2 is chiseled and polished.
[0062] This base treatment is similar to the conventional external steel reinforcement method. It usually requires the complete removal of the original structure's surface plaster layer, roughening the concrete until the aggregate is exposed, wiping with acetone to remove oil and dust, and grouting or repairing cracks or defects to ensure that the base is flat. This facilitates the installation of reinforcement components in subsequent construction operations, allowing them to fit tightly with the main structure and enhance the rigidity of beams and columns.
[0063] Meanwhile, due to the larger construction space on the far side of the joint, the base treatment is less difficult and the treatment effect can be ensured.
[0064] Install reinforcement devices:
[0065] The reinforcement device includes a distal seam-side reinforcement assembly and a proximal seam-side reinforcement assembly. The distal seam-side reinforcement assembly includes two first connecting plates 10, each having a protruding portion. The proximal seam-side reinforcement assembly includes a connecting rod 30 and a locking member 31.
[0066] The far joint side reinforcement component is surrounded and wrapped around the far joint side of beam 3 or column 2 to achieve reinforcement of the far joint side. Furthermore, during construction, the two first connecting plates 10 are installed close to the two far joint sides that are connected to the near joint side (e.g., by bonding), and the protrusions of the two first connecting plates 10 extend into the expansion joint 1.
[0067] The connecting rod 30 of the near joint side reinforcement component passes through the protrusion of the two first connecting plates 10 and is connected as one unit by the locking member 31. Thus, the near joint side reinforcement is achieved by the connecting rod 30, and the near joint side reinforcement component and the far joint side reinforcement component are integrated to improve the overall reinforcement effect of the beam and column.
[0068] Furthermore, this method eliminates the need for base treatment and subsequent grouting on the side near the joint. Additionally, the connecting rod 30 and locking member 31 can be installed from one side of the expansion joint 1, reducing construction difficulty and making it suitable for the narrow construction space at the expansion joint 1.
[0069] Sealing:
[0070] The gap between the reinforcement component on the far side and the surface of the beam 3 or column 2 on the far side is sealed and filled with adhesive to form a filler layer 40, thereby further improving the connection reliability between the components and the overall reinforcement effect of the beam and column. Moreover, the construction space on the far side is large, the filling difficulty is low, and the filling effect can be ensured.
[0071] This method not only facilitates construction operations on the near-joint side of beams and columns, but also results in minimal increase in cross-section after reinforcement, thus having little impact on the building's functionality.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A reinforcement device for beams and columns at expansion joints, wherein the beam or column includes a near-joint side and a far-joint side, characterized in that, The reinforcement device includes: A distal joint side reinforcement assembly is used to be installed on the distal joint side of the beam or column, and includes two first connecting plates, which are respectively installed on the two distal joint sides that are connected to the proximal joint side, and includes a protrusion for extending into the expansion joint. The near-seam reinforcement assembly includes a connecting rod and a locking member, wherein the connecting rod is used to pass through the protrusions of the two first connecting plates and is connected as one unit by the locking member.
2. The device for strengthening of the beam-column joint according to claim 1, characterized in that, The near-joint side reinforcement assembly also includes a stiffening plate, which is disposed at the angle between the protrusion and the near-joint side.
3. The device for strengthening of the beam-column joint according to claim 1, characterized in that, The connecting rod is a screw, the locking element is a nut, and the first connecting plate is a hoop plate.
4. The device for strengthening of the beam-column joint according to claim 1, characterized in that, The far joint side reinforcement assembly further includes an angle steel, a second connecting plate, and a first reinforcement plate. The angle steel is used to be installed at the corner of the far joint side of the beam or column, and the second connecting plate is used to connect adjacent angle steels. The first reinforcement plate is correspondingly installed with the first connecting plate and is used to be installed between the first connecting plate and the far joint side, and its end face is flush with the surface of the near joint side.
5. The device for strengthening of the beam-column joint according to claim 4, characterized in that, The angle steel is an equilateral angle steel, and the material and size of the first reinforcing plate are the same as those of the angle steel and its side plate.
6. The device for strengthening of the beam-column joint according to claim 4, characterized in that, The far-joint side reinforcement assembly also includes a first anchor bolt and two second reinforcement plates. The first anchor bolt is used to reinforce the beam by penetrating the floor slab away from the expansion joint and connecting to the second connecting plate. The two second reinforcement plates are respectively set at the anchor bolts above the floor slab and connected to the corresponding first connecting plates, and set on the side of the beam near the floor slab below and connected to the corresponding second connecting plates.
7. The device for strengthening of the beam-column joint according to claim 1, characterized in that, The distal seam reinforcement assembly further includes a third connecting plate, the number of which is adapted to the number of surfaces on the distal seam side, such that the third connecting plate is sequentially connected to the two first connecting plates and covers all surfaces on the distal seam side.
8. The device for strengthening of a beam-column joint according to claim 7, characterized in that, The far-joint side reinforcement assembly also includes a second anchor bolt, which is used to reinforce the beam by penetrating the floor slab away from the expansion joint and the first connecting plate disposed above the floor slab, and is connected to the third connecting plate disposed below the floor slab.
9. The device for strengthening of the beam-column joint according to claim 1, characterized in that, The cross-section of the beam or column is rectangular.