Anti-seismic reinforcing structure of existing concrete frame
By connecting the pre-embedded plates and pre-embedded bars to the concrete frame, and combining them with steel plate shear walls, the problem of insufficient lateral stiffness in existing buildings during the later stages of service is solved, achieving effective structural reinforcement and seismic performance improvement. This method is suitable for the reinforcement and renovation of existing concrete frames.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-03-06
AI Technical Summary
In the later stages of service, existing buildings may suffer from insufficient lateral stiffness due to changes in function and increased load. Traditional reinforcement methods are complicated by construction, high cost, and uneven stress distribution, making it difficult to meet reinforcement requirements.
The steel plate shear wall is connected to the concrete frame using embedded plates and reinforcing bars, and is combined with steel plate shear walls. The connection between the steel plate shear wall and the concrete frame is achieved through connectors, which enhances the overall stiffness and seismic performance of the structure.
It achieves effective structural reinforcement, improves overall stiffness and seismic performance, is easy to construct, reduces reinforcement costs, enhances stress uniformity and connection reliability, and is suitable for the reinforcement and renovation of existing concrete frames.
Smart Images
Figure CN223974910U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of seismic reinforcement structure of existing concrete frames, and more specifically, it relates to a seismic reinforcement structure for existing concrete frames. Background Technology
[0002] Many buildings in my country are entering the middle to late stages of their service life. Due to changes in their function, increased dead and live loads, and adjustments to design standards, many of these buildings require reinforcement due to increased seismic loads and insufficient lateral stiffness. To improve the lateral stiffness of structures, methods such as increasing beam and column cross-sections, adding concrete shear walls, or adding cross bracing can be used. However, among these methods, increasing beam and column cross-sections requires larger reinforcement beams; adding concrete shear walls requires wet construction and significantly increases vertical loads; and adding concrete cross bracing can easily lead to stress concentration and places high demands on connection nodes. Therefore, all of these reinforcement methods have certain drawbacks and are insufficient to meet the reinforcement needs of existing building structures. Utility Model Content
[0003] The purpose of this utility model is to provide an existing concrete frame seismic reinforcement structure that can effectively reinforce the existing structure, improve the overall stiffness of the structure, and ensure the overall seismic performance of the structure.
[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: An existing concrete frame seismic reinforcement structure is provided, comprising a concrete frame, a steel plate shear wall, an embedded plate, embedded reinforcement bars, and a connecting plate. The embedded plate is embedded in the inner peripheral wall of the concrete frame and has a through cavity in the same direction as the concrete frame. The embedded reinforcement bars are connected to the embedded plate and anchored within the concrete frame. The connecting plate is connected to the embedded plate and is arranged perpendicular to the through direction of the concrete frame. The steel plate shear wall is arranged vertically within the through cavity and is connected to the connecting plate via connectors.
[0005] In one possible implementation, the embedded plate includes two first plates extending in a horizontal direction and two second plates extending in a vertical direction. The length of the first plates is greater than the length of the second plates. Four connecting plates are provided, and the connecting plates are connected to the first plates or the second plates.
[0006] In some embodiments, the embedded reinforcement includes a first reinforcement connected to the first plate and a second reinforcement connected to the second plate. A plurality of first reinforcements and a plurality of second reinforcements are provided. The spacing between two adjacent second reinforcements is equal, and the spacing between two adjacent first reinforcements is equal.
[0007] In some embodiments, the first rib includes a reinforcing rib and a denser rib, with the denser ribs located near both ends and the middle of the first plate, and the reinforcing ribs located between two adjacent sets of denser ribs.
[0008] In one possible implementation, the connecting plate includes a horizontal plate and a vertical plate. The horizontal plate is connected to the first plate body, and the two ends of the horizontal plate are flush with the two ends of the first plate body. The vertical plate is connected to the second plate body and is located between the two horizontal plates.
[0009] In some embodiments, an elongated hole extending vertically along the main shaft is provided through the upper transverse plate, a circular hole is provided through the longitudinal plate, and a circular hole is also provided through the lower transverse plate. A through hole is provided in the steel plate shear wall, and the connector is provided through the through hole and the elongated hole or through the circular hole and the through hole.
[0010] In some embodiments, the spacing between the two transverse plates is greater than the length of the longitudinal plate.
[0011] In one possible implementation, the width of the concrete frame is equal to the width of the first slab and the width of the second slab in the through direction of the concrete frame.
[0012] In one possible implementation, two or three sets of embedded bars are spaced apart along the width direction of the embedded plate.
[0013] In one possible implementation, each group of embedded bars has several bars, and the several embedded bars in each group are arranged at intervals along the length of the embedded plate.
[0014] Compared with the prior art, the solution shown in this application embodiment provides an existing concrete frame seismic reinforcement structure. This structure achieves effective connection with the concrete frame through pre-embedded reinforcement bars and plates. The steel plate shear wall is connected to the connecting plate on the pre-embedded plate, facilitating the connection between the steel plate shear wall and the existing concrete frame. This improves the uniformity of stress distribution, effectively strengthens the existing structure, enhances the overall stiffness of the structure, and ensures the overall seismic performance of the structure. The oblong holes on the upper horizontal plate have the advantage of releasing vertical loads and mitigating the buckling of the steel plate shear wall. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the main sectional view of an existing concrete frame seismic reinforcement structure provided for an embodiment of this utility model;
[0017] Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure of AA;
[0018] Figure 3 This is an embodiment of the present utility model. Figure 2 A partially enlarged structural diagram of section I;
[0019] Figure 4 This is an embodiment of the present utility model. Figure 2 A partially enlarged structural diagram of section II;
[0020] Figure 5 This is a structural schematic diagram of the service state of an existing concrete frame seismic reinforcement structure provided for an embodiment of this utility model.
[0021] The following are the labeling elements in the figure:
[0022] 1. Concrete frame; 2. Steel plate shear wall; 3. Embedded plate; 31. First slab; 32. Second slab; 4. Embedded reinforcement; 41. First reinforcement; 411. Reinforcing reinforcement; 412. Dense reinforcement; 42. Second reinforcement; 5. Connecting plate; 51. Horizontal plate; 52. Longitudinal plate; 53. Oblong hole; 54. Circular hole; 55. Through hole; 6. Connector. Detailed Implementation
[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0024] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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. The terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.
[0025] Please refer to the following: Figures 1 to 5This invention provides a seismic reinforcement structure for existing concrete frames. The seismic reinforcement structure for existing concrete frames includes a concrete frame 1, a steel plate shear wall 2, an embedded plate 3, embedded reinforcing bars 4, and a connecting plate 5. The embedded plate 3 is embedded in the inner peripheral wall of the concrete frame 1 and has a through cavity in the same direction as the concrete frame 1. The embedded reinforcing bars 4 are connected to the embedded plate 3 and anchored within the concrete frame 1. The connecting plate 5 is connected to the embedded plate 3 and is perpendicular to the through direction of the concrete frame 1. The steel plate shear wall 2 is arranged vertically within the through cavity and is connected to the connecting plate 5 via a connector 6.
[0026] This embodiment provides a seismic reinforcement structure for an existing concrete frame. Compared with the prior art, this embodiment provides a seismic reinforcement structure for an existing concrete frame. Through the embedded reinforcement bars 4 and embedded plates 3, an effective connection is achieved with the concrete frame 1. The steel plate shear wall 2 is connected to the connecting plate 5 on the embedded plate 3, which facilitates the connection between the steel plate shear wall 2 and the existing concrete frame 1, improves the uniformity of stress, achieves effective reinforcement of the existing structure, improves the overall stiffness of the structure, and ensures the overall seismic performance of the structure. The elongated hole 53 is provided on the upper horizontal plate 51, which has the advantages of releasing vertical loads and reducing the buckling of the steel plate shear wall 2.
[0027] In this embodiment, a steel plate shear wall 2 is used to structurally reinforce the central region of the concrete frame 1. The concrete frame 1 is a rectangular hollow frame structure enclosed by longitudinally extending columns and laterally extending beams. The steel plate shear wall 2 is located in the central region of the concrete frame 1 and has high post-buckling load-bearing capacity and elastoplastic deformation capacity. Under seismic loading, the concrete frame 1 reinforced with the steel plate shear wall 2 exhibits superior seismic performance and features flexible and versatile structural forms, easy assembly, and easy replacement.
[0028] Reinforcing the existing concrete frame 1 using steel plate shear walls 2 results in a more uniform stress distribution on the structure. This allows for reinforcement and renovation on the original building foundation, ensuring overall structural reliability, improving the building's overall seismic performance, shortening reinforcement time, and reducing costs, demonstrating good practicality. The steel plate shear walls 2 are constructed from steel plates, resulting in minimal load increase, uniform stress distribution, and good ductility. As the first line of seismic defense, the steel plate shear walls 2 are connected to the connecting plates 5 using bolts and other connectors 6, facilitating replacement after an earthquake and improving ease of replacement. Please also refer to another possible implementation method. Figures 1 to 5The embedded plate 3 includes two horizontally extending first plate bodies 31 and two vertically extending second plate bodies 32. The length of the first plate body 31 is greater than the length of the second plate body 32. Four connecting plates 5 are provided, and the connecting plates 5 are connected to the first plate body 31 or the second plate body 32. The embedded plate 3 uses two horizontally extending first plate bodies 31 and two vertically extending second plate bodies 32. The lengths of the first plate bodies 31 and the second plate bodies 32 are set according to the dimensions of the floor height and the column spacing. If the floor height is greater than the column spacing, the length of the first plate body 31 is less than the length of the second plate body 32, and a tension band can be formed. If the floor height is equal to the column spacing, the length of the first plate body 31 is equal to the length of the second plate body 32, and a tension band is also formed. If the floor height is less than the column spacing, the length of the first plate body 31 is greater than the length of the second plate body 32, and one, two, or three tension bands arranged sequentially in the horizontal direction may be formed depending on the difference in length.
[0029] In this embodiment, multiple embedded plates 3 are provided on the inner periphery of the concrete frame 1, including two first plates 31 and two second plates 32. The first plates 31 are correspondingly arranged on the long side of the concrete frame 1, and the second plates 32 are correspondingly arranged on the short side of the concrete frame 1. The length of the first plates 31 is greater than the length of the second plates 32. Embedded reinforcing bars 4 extending into the interior of the concrete frame 1 are respectively connected to the first plates 31 and the second plates 32. The embedded reinforcing bars 4 connected to the first plates 31 are arranged perpendicular to the first plates 31, and the embedded reinforcing bars 4 connected to the second plates 32 are arranged perpendicular to the second plates 32.
[0030] In some embodiments, please refer to the following: Figures 1 to 5 The pre-embedded reinforcement 4 includes a first reinforcement 41 connected to the first plate 31 and a second reinforcement 42 connected to the second plate 32. Several first reinforcements 41 and second reinforcements 42 are provided respectively. The spacing between two adjacent second reinforcements 42 is equal, and the spacing between two adjacent first reinforcements 41 is equal.
[0031] In this embodiment, the embedded reinforcement 4 adopts a combination of the first reinforcement 41 and the second reinforcement 42. The first reinforcement 41 is perpendicular to the first plate 31 and connected to the first plate 31, extending into the long side of the concrete frame 1 to form an embedded function. The second reinforcement 42 is perpendicular to the second plate 32 and connected to the second plate 32, extending into the short side of the concrete frame 1 to form an embedded function. This facilitates the enhancement of the connection reliability between the steel plate shear wall 2 and the concrete frame 1, ensuring a reliable connection between the steel plate shear wall 2 and the concrete frame 1.
[0032] Specifically, multiple first reinforcing bars 41 are connected to the same first plate 31, with equal spacing between adjacent first reinforcing bars 41 to ensure balanced stress distribution at each location and guarantee the reinforcement effect at each point. Similarly, multiple second reinforcing bars 42 are connected to the same second plate 32, with equal spacing between adjacent second reinforcing bars 42, making the stress distribution on the outer periphery of the steel plate shear wall 2 more uniform and improving the reliability of the reinforcement.
[0033] In some embodiments, please refer to the following: Figures 1 to 5 The first rib 41 includes a reinforcing rib 411 and a denser rib 412. The denser rib 412 is located near both ends and the middle of the first plate 31, and the reinforcing rib 411 is located between two adjacent groups of denser ribs 412.
[0034] In this embodiment, according to the formation position of the structural tension band, a denser rib 412 is provided in the stress-bearing area of the tension band.
[0035] For details, please see Figure 1 Taking the example where the length of the first plate 31 is greater than the length of the second plate 32, the following explanation is provided. The length of the first plate 31 is approximately twice the length of the second plate 32. Two tension bands are distributed horizontally along a 45-degree angle. Based on the distribution of the tension bands, the key connection points are located near the ends and middle of the long side of the concrete frame 1. The steel plate shear wall 2 is prone to tensile stress at these locations. Therefore, reinforced reinforcement bars 412 are installed in these areas. The distance between two adjacent reinforced reinforcement bars 412 is less than the spacing between two adjacent reinforcing bars 411. By installing reinforced reinforcement bars 412, force can be effectively transferred, increasing the reliability of the connection between the steel plate shear wall 2 and the concrete frame 1, and enhancing the structural reinforcement effect.
[0036] Please refer to one possible implementation as well. Figures 1 to 5 The connecting plate 5 includes a transverse plate 51 and a longitudinal plate 52. The transverse plate 51 is connected to the first plate 31, and its two ends correspond to and are flush with the two ends of the first plate 31. The longitudinal plate 52 is connected to the second plate 32 and is located between the two transverse plates 51. The length of the transverse plate 51 is the same as the length of the first plate 31, which can realize the effective connection between the steel plate shear wall 2 and the transverse plate 51 in the transverse direction, ensuring good structural support effect and improving the reinforcement performance of the structure.
[0037] In some embodiments, please refer to the following: Figures 1 to 5 The distance between the two transverse plates 51 is greater than the length of the longitudinal plate 52. The longitudinal plate 52 is positioned between the upper and lower transverse plates 51, and there is a certain gap between the longitudinal plate 52 and the transverse plates 51 to ensure that the building can better disperse and absorb seismic energy during an earthquake, thereby reducing structural damage.
[0038] In some embodiments, please refer to the following: Figures 1 to 5 The upper horizontal plate 51 is provided with an elongated hole 53 extending vertically along the main shaft, the vertical plate 52 is provided with a circular hole 54, the lower horizontal plate 51 is also provided with a circular hole 54, the steel plate shear wall 2 is provided with a through hole 55, and the connector 6 is provided with the through hole 55 and the elongated hole 53 or the through hole 54 and the through hole 55.
[0039] In this embodiment, when connecting the longitudinal plate 52 and the steel plate shear wall 2, the connector 6 is provided through the circular hole 54 of the longitudinal plate 52 and the through hole 55 of the steel plate shear wall 2, and the longitudinal plate 52 and the steel plate shear wall 2 are effectively locked by the cooperation of bolts and nuts.
[0040] Meanwhile, when connecting the transverse plate 51 and the steel plate shear wall 2, the connector 6 is installed through the elongated hole 53 in the transverse plate 51 and the through hole 55 in the steel plate shear wall 2. The bolts and nuts work together to effectively lock the transverse plate 51 and the steel plate shear wall 2. To better ensure the function of the steel plate shear wall 2, the connector 6 often uses a high-strength bolt friction connection, and the contact surface is treated by shot blasting or other methods. By providing the elongated hole 53 on the upper transverse plate 51, the vertical force generated by the beam on the steel plate shear wall 2 can be effectively released, preventing the steel plate shear wall 2 from buckling under compression and ensuring the reinforcement effect of the steel plate shear wall 2 on the concrete frame 1.
[0041] Please refer to one possible implementation as well. Figures 1 to 5 In the penetrating direction of the concrete frame 1, the width of the concrete frame 1 is equal to the width of the first plate 31, and the width of the concrete frame 1 is equal to the width of the second plate 32. The width of the concrete frame 1 is the same as the width of the first body and the width of the second plate, which allows for reliable connection between the embedded plate 3 and the inner periphery of the concrete frame 1, while also providing structural support to its inner periphery. Furthermore, it can improve the reliability of the subsequent connection with the steel plate shear wall 2.
[0042] Please refer to one possible implementation as well. Figures 1 to 5 Two sets of embedded reinforcing bars 4 are spaced apart along the width direction of the embedded plate 3, and the two sets of embedded reinforcing bars 4 are symmetrically located on both sides of the connecting plate 5. Each set of embedded reinforcing bars 4 has a number of bars, and the number of embedded reinforcing bars 4 in each set are spaced apart along the length direction of the embedded plate 3.
[0043] In this embodiment, two sets of embedded reinforcing bars 4 are provided to enhance the connection effect with the concrete frame 1. The two sets of embedded reinforcing bars 4 are symmetrically located on both sides of the connecting plate 5 to ensure the connection performance with the concrete frame 1, and to a certain extent, to reinforce the inner periphery of the concrete frame 1, thereby improving the connection strength with the steel plate shear wall 2 and enhancing the seismic performance of the entire structure.
[0044] The aforementioned seismic reinforcement structure for existing concrete frames achieves effective connection with the concrete frame 1 through pre-embedded reinforcement bars 4 and pre-embedded plates 3. The steel plate shear wall 2 is connected to the connecting plate 5 on the pre-embedded plate 3, which facilitates the connection between the steel plate shear wall 2 and the existing concrete frame 1, improves the uniformity of stress, effectively strengthens the existing structure, improves the overall stiffness of the structure, and ensures the overall seismic performance of the structure.
[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A seismic retrofitting structure for an existing concrete frame, characterized by, The application relates to a concrete frame (1), a steel plate shear wall (2), a pre-embedded plate (3), a pre-embedded rib (4) and a connecting plate (5), wherein the pre-embedded plate (3) is embedded on the inner circumferential wall of the concrete frame (1) and has a through cavity in the same direction as the concrete frame (1), the pre-embedded rib (4) is connected to the pre-embedded plate (3) and is anchored in the concrete frame (1), the connecting plate (5) is connected to the pre-embedded plate (3) and is arranged perpendicularly to the through direction of the concrete frame (1), and the steel plate shear wall (2) is arranged in the through cavity in the up-down direction and is connected to the connecting plate (5) through a connecting piece (6).
2. A seismic retrofitting structure for an existing concrete frame according to claim 1, wherein The pre-embedded plate (3) comprises two first plate bodies (31) extending in the horizontal direction and two second plate bodies (32) extending in the up-down direction, the length of the first plate body (31) is greater than the length of the second plate body (32), and four connecting plates (5) are arranged.
3. A seismic retrofitting structure for an existing concrete frame according to claim 2, wherein The pre-embedded rib (4) comprises first ribs (41) connected to the first plate bodies (31) and second ribs (42) connected to the second plate bodies (32), the first ribs (41) and the second ribs (42) are respectively provided with a plurality of ribs, the interval between two adjacent second ribs (42) is equal, and the interval between two adjacent first ribs (41) is equal.
4. A seismic retrofitting structure for an existing concrete frame according to claim 3, wherein The first rib (41) comprises a reinforcing rib (411) and a densified rib (412), the densified rib (412) is arranged close to the two ends and the middle of the first plate body (31), and the reinforcing rib (411) is located between two adjacent groups of the densified rib (412).
5. A seismic retrofitting structure for an existing concrete frame according to claim 3, wherein The connecting plate (5) comprises a transverse plate (51) and a longitudinal plate (52), the transverse plate (51) is connected to the first plate body (31), the two ends of the transverse plate (51) are flush with the two ends of the first plate body (31) in one-to-one correspondence, and the longitudinal plate (52) is connected to the second plate body (32) and is located between two transverse plates (51).
6. A seismic retrofitting structure for an existing concrete frame according to claim 5, wherein A long circular hole (53) extending in the up-down direction is arranged through the upper transverse plate (51) and a circular hole (54) is arranged through the longitudinal plate (52), a circular hole (54) is also arranged through the lower transverse plate (51), a through hole (55) is arranged on the steel plate shear wall (2), and the connecting piece (6) is arranged through the through hole (55) and the long circular hole (53) or is arranged through the circular hole (54) and the through hole (55).
7. A seismic retrofitting structure for an existing concrete frame according to claim 5, wherein The interval between two transverse plates (51) is greater than the length of the longitudinal plate (52).
8. A seismic retrofitting structure for an existing concrete frame according to claim 2, wherein In the through direction of the concrete frame (1), the width of the concrete frame (1) is equal to the width of the first plate body (31), and the width of the concrete frame (1) is equal to the width of the second plate body (32).
9. A seismic retrofitting structure of an existing concrete frame according to any one of claims 1 to 8, wherein The embedded ribs (4) are arranged in two groups along the width direction of the embedded plate (3), and the two groups of embedded ribs (4) are symmetrically located on both sides of the connecting plate (5).
10. A seismic retrofitting structure for an existing concrete frame according to any one of claims 1 to 8, wherein Each group of embedded ribs (4) is provided with a plurality of embedded ribs (4), and the plurality of embedded ribs (4) in each group are arranged in the length direction of the embedded plate (3).