A lever-amplified self-centering hinged rocking frame structure for reinforcing a steel frame structure

Abstract

This utility model discloses a lever-amplified self-resetting hinged swing frame structure for reinforcing a steel frame structure, including a main steel frame, an external swing frame, a damper, a lever amplification system, and a self-resetting displacement damper. The external swing frame is located on one or both sides of the main steel frame, including a central column and side columns. The bottom of the central column is hinged to the foundation through a first hinge point. The lever amplification system includes a vertical connecting rod connected to the lower end of the side column, an amplification lever, and a triangular bracket fixed to the foundation. The end of the vertical connecting rod away from the side column is hinged to the first end of the amplification lever, and the middle part of the amplification lever is hinged to the triangular bracket. One end of the self-resetting displacement damper is hinged to the other end of the amplification lever, and the other end is hinged to the foundation. The external swing frame is laterally connected to the main steel frame using rigid connectors and a damper. This design enables the structure to possess both excellent energy dissipation and self-resetting capabilities under relatively small horizontal displacements, reducing plastic deformation of the main structure.

Description

Technical Field

[0001] This utility model belongs to the field of seismic resistance of building structures, and relates to a lever-amplified self-resetting hinged swing frame structure for reinforcing steel frame structures. Background Technology

[0002] Steel frame structures, with their high strength, lightweight characteristics, and superior ductility and energy dissipation capabilities, have become an important structural form in high-rise and super high-rise building systems. However, under strong earthquakes, the residual deformation of the structure after the earthquake is not negligible, leading to a significant increase in repair costs and severely restricting the recoverability of the structure. It is worth noting that traditional steel frame systems also face the challenge of cross-story failure. Their failure mode often manifests as concentrated damage in localized weak stories, failing to fully utilize the collaborative working mechanism of multiple components, resulting in lower overall structural ductility and load-bearing capacity. This non-uniform damage distribution not only reduces material utilization but also exacerbates the difficulty of post-earthquake functional recovery.

[0003] Against this backdrop, recoverable functional structural systems have emerged as a representative achievement of the new generation of earthquake-resistant design concepts, with their core objective shifting from traditional "life safety" assurance to "damage controllability" design. Among these, the swaying structural system, through interface constraint release technology, introduces a controllable rotation mechanism at the interface of structural components or foundation connections, effectively reconstructing the force transmission path within the structure. This structural measure not only significantly reduces the accumulation of plastic damage in critical components but also achieves effective control of post-earthquake residual deformation through the coordinated work of self-resetting devices and energy-dissipating elements. Currently, the swaying structural system has been successfully applied in the fields of new building construction and the reinforcement of existing structures. Its excellent post-earthquake recoverability and adaptability potential provide an important technical path for the development of high-performance earthquake-resistant structures.

[0004] Currently, additional hinged swing frames are a common form of structural reinforcement. By regulating the lateral deformation mode of the connected steel frame through the rigid swing of the hinged swing frame, weak layers in the steel frame are eliminated. During swinging, the displacement damper undergoes axial deformation to dissipate energy, and the restoring force generated by the self-resetting element effectively suppresses the accumulation of residual deformation in the components, thus ensuring good post-earthquake restoring capacity. However, existing research shows that the limited inter-story deformation capacity of traditional steel frame systems restricts the swing amplitude of the hinged swing frame, resulting in limited displacement of the displacement damper, making it difficult to reach its optimal working state and fully utilize its energy dissipation capacity. Furthermore, when using conventional displacement dampers, their irreversible plastic deformation leads to significant residual displacement accumulation. While using self-resetting dampers can improve restoring performance, the "flag-shaped" hysteresis characteristic of self-resetting dampers causes a significant decrease in the energy dissipation efficiency of the structure under small to medium earthquakes. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lever-amplified self-resetting hinged swing frame structure for reinforcing steel frame structures. This structure can achieve both excellent energy dissipation and self-resetting capabilities with a small horizontal displacement, reduce plastic deformation of the main structure, effectively control the deformation mode of the main structure, suppress the generation of weak layers, and improve the ductility and load-bearing capacity of the structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lever-amplified self-resetting hinged swing frame structure with a reinforced steel frame includes a main steel frame, an external swing frame, a damper, a lever amplification system, and a self-resetting displacement damper.

[0008] The external swing frame is set on one or both sides of the main steel frame. The external swing frame includes a central column, two side columns symmetrically arranged on both sides of the central column, and multiple layers of crossbeams connecting the central column and the side columns. The bottom of the central column is hinged to the foundation through the first hinge point.

[0009] The lever amplification system includes a vertical connecting rod connected to the lower end of the side post, an amplification lever, and a triangular bracket fixed to the foundation. The end of the vertical connecting rod away from the side post is hinged to the first end of the amplification lever, and the middle part of the amplification lever is hinged to the triangular bracket.

[0010] One end of the self-resetting displacement damper is hinged to the other end of the amplifying lever, and the other end is hinged to the foundation; the external swing frame is laterally connected to the main steel frame using rigid connectors and dampers.

[0011] Preferably, the rigid connector has a box-shaped cross-section, with its two ends hinged to the side columns of the main steel frame and the side columns of the external swing frame, respectively.

[0012] Preferably, the damper is a butterfly-shaped steel plate damper.

[0013] Preferably, the butterfly-shaped steel plate damper is connected to the main steel frame and the external swing frame at both ends by high-strength bolts.

[0014] Preferably, the vertical connecting rod is hinged to the lower end of the side column at the second hinge point and to the amplifying lever at the third hinge point; the amplifying lever is hinged to the triangular bracket at the fourth hinge point.

[0015] Preferably, the upper end of the self-resetting displacement damper is hinged to the amplifying lever at the fifth hinge point, and the lower end is hinged to the foundation at the sixth hinge point.

[0016] Preferably, the hinge point adopts an ear plate-pin structure.

[0017] Preferably, the external swing frame is longitudinally connected to the main steel frame via longitudinal horizontal supports.

[0018] Preferably, diagonal bracing connecting the central column and the side column is provided between the beams of adjacent layers.

[0019] Preferably, the side columns are provided with a first side column stiffening rib in the horizontal direction and a second side column stiffening rib in the vertical direction, and the middle column is provided with a first middle column stiffening rib in the horizontal direction and a second middle column stiffening rib in the vertical direction.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention, by adding a lever-amplified self-resetting hinged swing frame structure to the main steel frame structure, allows the external swing frame to preferentially exert its energy-dissipating and vibration-damping effect during small and medium displacement stages, relying on its lever amplification characteristics. This effectively reduces the seismic energy input to the main steel frame and inhibits the accumulation of plastic damage. The external swing frame forms a rigid body motion around the first hinge point as the rotation center, which can effectively control the deformation mode of the main steel frame structure after reinforcing the existing building structure, thereby improving the overall seismic performance of the structure and preventing damage concentration and the occurrence of weak layer failure.

[0022] Furthermore, the connection interface between the external swing frame and the main steel frame is the main deformation area of ​​the structural system. Installing dampers can achieve concentrated dissipation of seismic energy. This structural measure significantly reduces the proportion of energy dissipation in the main structural components by regulating the energy distribution path, effectively suppressing the accumulation of structural damage. After an earthquake, only the damaged dampers need to be replaced to quickly restore the structure's usability.

[0023] Furthermore, the butterfly damper has stable performance and is easy to manufacture, providing a stable energy dissipation capability for the structure.

[0024] Furthermore, the self-resetting displacement damper enhances the seismic performance of the structure through a dual mechanism: its displacement-related energy dissipation characteristics significantly enhance the structure's energy dissipation capacity, while its built-in self-resetting force effectively suppresses the accumulation of residual plastic deformation, enabling the structure to autonomously recover its performance after an earthquake.

[0025] Furthermore, the displacement amplification effect can be adjusted through a lever amplification system to meet the energy consumption requirements of different structures. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the lever-enlarged self-resetting hinged swing frame structure of the reinforced steel frame structure of this utility model;

[0027] Figure 2 This is an elevation layout diagram of a single-span structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the external swing frame structure of this utility model;

[0029] Figure 4This is a schematic elevation view of the external swing frame of this utility model;

[0030] Figure 5 This is a schematic diagram of the ear plate-pin structure of this utility model;

[0031] Figure 6 This is a schematic diagram of the rigid connector structure of this utility model;

[0032] Figure 7 This is a schematic diagram of the connection structure of the butterfly-shaped steel plate damper of this utility model;

[0033] The components include: 1. Main steel frame; 2. External swing frame; 3. Rigid connector; 4. Seventh hinge point; 5. Damper; 6. High-strength bolt; 7. Longitudinal horizontal support; 8. Foundation; 9. Main frame column stiffening rib; 10. Central column; 11. Crossbeam; 12. Side column; 13. Crossbeam stiffening rib; 14. First central column stiffening rib; 15. Diagonal brace; 16. First side column stiffening rib; 17. Second side column stiffening rib; 18. Second hinge point; 19. Vertical connecting rod; 20. Third hinge point; 21. Fourth hinge point; 22. Amplifying lever; 23. Fifth hinge point; 24. Self-resetting displacement damper; 25. Sixth hinge point; 26. Triangular bracket; 27. First hinge point; 28. Second central column stiffening rib; 29. ​​Eighth hinge point. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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" 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terms “installation,” “connection,” and “linkage” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection, an electrical connection, or a connection that allows communication; a direct connection or an indirect connection via an intermediate medium; or a connection within two elements or an interaction between two elements. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0039] like Figure 1 and Figure 2 As shown, the lever-amplified self-resetting hinged swing frame structure of the reinforced steel frame structure described in this embodiment includes a main steel frame 1 and multiple external swing frames 2.

[0040] The main steel frame 1 has stiffening ribs 9 at the bottom of the columns.

[0041] Each external swing frame 2 includes a swing frame, two sets of lever amplification systems symmetrically arranged on both sides of the swing frame, and a self-resetting displacement damper 24, which together constitute the structural surface.

[0042] like Figure 3-6 As shown, multiple external swing frames 2 are installed on either side of the main steel frame 1, or on both sides. The number of external swing frames on each side is the same as the number of main steel frame frames on the corresponding side. The main steel frame 1 and the external swing frames 2 are laterally connected by rigid connectors 3 with box-shaped sections and dampers 5. The longitudinal connection is achieved by longitudinal horizontal supports 7 welded between the columns. The rigid connectors 3 are connected to the seventh hinge point 4 and the eighth hinge point 29. The hinge points are constructed using a pin-ear plate structure. The ear plates are connected to the columns and side columns 12 of the main steel frame 1 by welding. The specific dimensions of the ear plates and pins can be designed according to the "Steel Structure Design Standard". All subsequent hinge point implementation methods, ear plate pin design methods, and ear plate connection methods with structural components adopt the same method. Figure 7 As shown, the damper 5 is constructed as a butterfly damper. To effectively achieve post-earthquake replacement, the damper 5 is connected to the main steel frame 1 and the external swing frame 2 by high-strength bolts 6.

[0043] The number of rigid connectors 3 is consistent with the number of layers of the multiple external swing frames 2, and their installation elevation is flush with the crossbeam 11. The rigid connectors 3 adopt a box-shaped cross section, with ear plates welded to both ends, and are connected to the main steel frame 1 and the external swing frames 2 through the seventh hinge point 4 and the eighth hinge point 29.

[0044] The swaying frame is composed of a central column 10, two side columns 12 symmetrically arranged on both sides of the central column, and multiple layers of crossbeams 11 welded to the central column 10 and the side columns 12. Diagonal braces 15 connecting the central column 10 and the side columns 12 are provided between adjacent layers of crossbeams. The bottom of the central column 10 is connected to the foundation 8 through a first hinge point 27, and the rotation plane of the hinge point coincides with the structural plane.

[0045] To avoid spatial conflicts between the lever amplification system and the swing frame, the height of the side column 12 is reduced by half compared to the height of the middle column 10 at the bottom floor level.

[0046] To prevent local buckling, the side column 12 is provided with a first side column stiffening rib 16 in the horizontal direction and a second side column stiffening rib 17 in the vertical direction, the crossbeam 11 is provided with a crossbeam stiffening rib 13 in the vertical direction, and the middle column 10 is provided with a first middle column stiffening rib 14 in the horizontal direction and a second middle column stiffening rib 28 in the vertical direction.

[0047] The first hinge point 27, the second hinge point 18, the third hinge point 20, the fifth hinge point 23, the sixth hinge point 25, the seventh hinge point 4, and the eighth hinge point 29 are all implemented using an ear plate-pin structure.

[0048] The lever amplification system includes a vertical connecting rod 19, an amplifying lever 22, and a triangular bracket 26. The vertical connecting rod 19 is connected to the lower end of the side column 12 through the second hinge point 18 and to the amplifying lever 22 through the third hinge point 20. The amplifying lever 22 is connected to the triangular bracket 26 through the fourth hinge point 21, which is also the fulcrum of the amplifying lever.

[0049] The triangular bracket is made of a pair of short H-shaped steel columns, with the upper part of which is machined into a "Γ" shaped cut and then welded together.

[0050] The upper end of the self-resetting displacement damper 24 is connected to the amplifying lever 22 via the fifth hinge point 23, and the lower end is connected to the foundation 8 via the sixth hinge point 25.

[0051] The length of components within the lever amplification system must meet the following requirements. l 1≥ θl 2. To ensure the effective operation of the system, the displacement amplification effect can be adjusted by controlling the lever ratio. l 1 / l 3. Implementation, among which l 1 represents the axial distance between the pins at the third hinge point 20 and the fourth hinge point 21. θ The rotation angle of the swaying frame under horizontal seismic loading. l 2 represents the length of the bottom diagonal brace, which is 15. l 3 represents the axial distance between the pins at the fourth hinge point 21 and the fifth hinge point 23.

[0052] Damper 5 is a butterfly-shaped steel plate damper, connected at both ends to the main steel frame 1 and the external swing frame 2 by high-strength bolts 6. Damper 5 should preferably be made of low yield point steel to provide the structure with better energy dissipation capacity and fatigue performance.

[0053] All components of the external swing frame are made of Q355 steel to ensure that the design cross-sectional dimensions of the main components are not too large and that they are in an elastic stress state during the swinging process.

[0054] The assembly method of the lever-amplified self-resetting hinged swing frame structure of the reinforced steel frame structure includes the following steps:

[0055] Step 1: Weld the ear plate at the first hinge point 27 to the foundation 8 and the central column 10.

[0056] Step 2: Weld the swing frame support 15 and the crossbeam 11 to both sides of the central column 10, weld the side column 12 to the crossbeam 11 and the support 15, and weld stiffening ribs 13, 14, 16 and 28. Make bolt holes for connecting dampers 5 at the corresponding positions of the side column 12 to form a single external swing frame 2.

[0057] Step 3: Weld the required ear plates of the seventh hinge point 4 and the eighth hinge point 29 to the corresponding positions of the side column 12 and the main steel frame 1.

[0058] Step 4: Hoist the external swing frame 2 to form the first hinge point 27.

[0059] Step 5: Hoist the rigid connector 3 to form the seventh hinge point 4 and the eighth hinge point 29.

[0060] Step 6: Connect the two ends of the butterfly-shaped steel plate damper 5 to the side column 12 and the side column of the main steel frame 1 using high-strength bolts 6.

[0061] Step 7: Weld the longitudinal horizontal support 7 to the side column 12 and the side column of the main steel frame 1, thereby realizing the longitudinal connection between the external swing frame 2 and the main steel frame 1.

[0062] Step 8: Assemble the lever amplification system and the self-resetting displacement damper 24.

[0063] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0064] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0066] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0067] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0068] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

Claims

1. A lever-amplified self-resetting hinged swing frame structure for reinforcing steel frame structures, characterized in that, Includes the main steel frame (1), external swing frame (2), damper (5), lever amplification system and self-resetting displacement type damper (24); The external swing frame (2) is set on one or both sides of the main steel frame (1). The external swing frame (2) includes a central column (10), two side columns (12) symmetrically arranged on both sides of the central column, and a multi-layered crossbeam (11) connecting the central column (10) and the side columns (12). The bottom of the central column (10) is hinged to the foundation (8) through the first hinge point (27). The lever amplification system includes a vertical connecting rod (19) connected to the lower end of the side post (12), an amplification lever (22), and a triangular bracket (26) fixed to the foundation (8). The end of the vertical connecting rod (19) away from the side post (12) is hinged to the head end of the amplification lever (22), and the middle part of the amplification lever (22) is hinged to the triangular bracket (26). One end of the self-resetting displacement damper (24) is hinged to the other end of the amplifying lever (22), and the other end is hinged to the foundation (8); the external swing frame (2) is laterally connected to the main steel frame (1) using rigid connectors (3) and dampers (5).

2. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The rigid connector (3) has a box-shaped cross section, and its two ends are respectively hinged to the side column of the main steel frame (1) and the side column (12) of the external swing frame (2).

3. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The damper (5) is a butterfly-shaped steel plate damper.

4. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 3, characterized in that, The butterfly-shaped steel plate damper (5) is connected to the main steel frame (1) and the external swing frame (2) at both ends by high-strength bolts (6).

5. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The vertical link (19) is hinged to the lower end of the side column (12) at the second hinge point (18) and to the amplifying lever (22) at the third hinge point (20); the amplifying lever (22) is hinged to the triangular bracket (26) at the fourth hinge point (21).

6. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The upper end of the self-resetting displacement damper (24) is hinged to the amplifying lever (22) via the fifth hinge point (23), and the lower end is hinged to the foundation (8) via the sixth hinge point (25).

7. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The hinge point adopts an ear plate-pin structure.

8. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The external swing frame (2) is longitudinally connected to the main steel frame (1) by longitudinal horizontal support (7).

9. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, Diagonal bracing (15) is provided between the beams of adjacent floors to connect the central column (10) and the side column (12).

10. The lever-amplified self-resetting hinged swing frame structure for reinforced steel frame structure according to claim 1, characterized in that, The side column (12) is provided with a first side column stiffening rib (16) in the horizontal direction and a second side column stiffening rib (17) in the vertical direction, and the middle column (10) is provided with a first middle column stiffening rib (14) in the horizontal direction and a second middle column stiffening rib (28) in the vertical direction.

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