Lever amplification type self-resetting hinged support swing frame structure for reinforcing steel frame structure and assembly method of lever amplification type self-resetting hinged support swing frame structure

Abstract

The invention discloses a lever amplification type self-resetting hinged support swing frame structure for reinforcing a steel frame structure and an assembly method of the lever amplification type self-resetting hinged support swing frame structure. The lever amplification type self-resetting hinged support swing frame structure comprises a main body steel frame, an external attached swing frame, a damper, a lever amplification system and a self-resetting displacement type damper, the external swinging frame is arranged on one side or two sides of the main body steel frame and comprises a middle column and side columns, and the bottom of the middle column is hinged to a foundation through a first hinge point; the lever amplification system comprises a vertical connecting rod connected with the lower end of the side column, an amplification lever and a triangular support fixed to the foundation, the end, away from the side column, of the vertical connecting rod is hinged to the head end of the amplification lever, and the middle of the amplification lever is hinged to the triangular support. One end of the self-resetting displacement damper is hinged with the other end of the amplification lever, and the other end is hinged with the foundation; and the external swing frame is transversely connected with the main body steel frame through a rigid connecting piece and a damper. The structure can have excellent energy consumption and self-resetting capacity under the condition of small horizontal displacement, and plastic deformation of a main body structure is reduced.

Description

Technical Field

[0001] The invention belongs to the field of earthquake resistance of building structures and relates to a lever-amplified self-resetting hinged swing frame structure of a reinforced steel frame structure and an assembly method thereof. Background Art

[0002] Steel frame structures have become an important structural form in high-rise and super-high-rise building systems due to their high strength, lightweight characteristics, superior ductility and energy dissipation capabilities. However, under the action of strong earthquakes, the post-earthquake structure has non-negligible residual deformation, which leads to a significant increase in repair costs and seriously restricts the recoverability of the structure. It is worth noting that the traditional steel frame system also has the problem of cross-layer damage. Its failure mode is mostly manifested as concentrated damage to local weak layers, and the collaborative working mechanism of multiple components is not fully utilized, resulting in low overall structural ductility indicators and bearing capacity. This non-uniform damage distribution not only reduces material utilization, but also increases the difficulty of post-earthquake functional restoration.

[0003] Against this backdrop, the recoverable functional structural system has emerged as a representative achievement of the new generation of earthquake-resistant concepts. Its core goal has been upgraded from traditional "life safety" protection to "damage controllable" design. Among them, the rocking structural system introduces a controllable rotation mechanism at the interface of structural components or foundation connections through interface constraint release technology, effectively reconstructing the internal force transmission path of the structure. This structural measure not only significantly reduces the accumulation of plastic damage in key components, but also achieves effective control of the residual deformation of the structure after an earthquake through the coordinated work of the self-resetting device and the energy-absorbing elements. At present, the rocking structural system has been successfully applied to the fields of new buildings and reinforcement of existing structures. Its excellent post-earthquake recoverability and adaptive transformation potential provide an important technical path for the development of high-performance earthquake-resistant structures.

[0004] Currently, the addition of hinged rocker frames is a common form of structural reinforcement. By swaying the rigid body of the hinged rocker frame, the lateral deformation mode of the connected steel frame is controlled, eliminating the weak layer of the steel frame. When the structure sways, the displacement damper undergoes axial deformation to dissipate energy. The restoring force generated by the self-resetting element effectively suppresses the accumulation of residual deformation in the component, thereby ensuring the structure's good post-earthquake restoring ability. However, existing research has shown that the limited inter-story deformation capacity of traditional steel frame systems restricts the swing amplitude of the hinged rocker frame, resulting in limited displacement of the displacement damper, making it difficult to achieve optimal working conditions and fully utilize its energy dissipation capacity. Furthermore, when conventional displacement dampers are used, their irreversible plastic deformation leads to significant residual displacement accumulation. While the use of self-resetting dampers can improve the restoring performance, the "flag-shaped" hysteresis characteristics of the self-resetting damper significantly reduce the structure's energy dissipation efficiency under small and medium earthquakes. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a lever-amplified self-resetting hinged swing frame structure for reinforcing a steel frame structure and an assembly method thereof, which can enable the structure to have both excellent energy consumption and self-resetting capabilities under a relatively small horizontal displacement, reduce the plastic deformation of the main structure, and effectively control the deformation mode of the main structure, inhibit the formation of weak layers, and improve the structural ductility and bearing capacity.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A lever-amplified self-resetting hinged swing frame structure with a reinforced steel frame structure, comprising a main steel frame, an external swing frame, a damper, a lever-amplifying system and a self-resetting displacement damper; The external swing frame is arranged 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 multi-layer 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. The lever amplification system includes a vertical connecting rod connected to the lower end of the side column, an amplifying 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 head end of the amplifying lever, and the middle part of the amplifying lever is hinged to the triangular bracket. 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 horizontally connected to the main steel frame using a rigid connector and a damper.

[0007] Preferably, the rigid connector is a box-section, with both ends hinged to the side columns of the main steel frame and the side columns of the external swing frame respectively.

[0008] Preferably, the damper is a butterfly steel plate damper.

[0009] Preferably, both ends of the butterfly steel plate damper are connected to the main steel frame and the external swing frame respectively using high-strength bolts.

[0010] Preferably, the vertical connecting rod is hinged to the lower end of the side column using a second hinge point, and is hinged to the amplifying lever using a third hinge point; the amplifying lever is hinged to the triangular bracket using a fourth hinge point.

[0011] Preferably, the upper end of the self-resetting displacement damper is hinged to the amplifying lever through a fifth hinge point, and the lower end is hinged to the base through a sixth hinge point.

[0012] Preferably, the hinge point adopts an ear plate-pin structure.

[0013] Preferably, the external swing frame is longitudinally connected to the main steel frame through a longitudinal horizontal support.

[0014] Preferably, diagonal braces connecting the central column and the side columns are provided between adjacent layers of cross beams.

[0015] A method for assembling the lever-amplified self-resetting hinged swing frame structure of the reinforced steel frame structure comprises the following steps: Assemble to form a single external swing frame; hoist the external swing frame so that its bottom is hinged to the foundation through the first hinge point; install rigid connectors and dampers to achieve the lateral connection between the external swing frame and the main steel frame; assemble the lever amplification system and install the self-resetting displacement damper, and connect the self-resetting displacement damper between the amplification lever and the foundation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: According to the present invention, after a lever-amplified self-resetting hinged swing frame structure is added to the main steel frame structure, in the small and medium displacement stages, the external swing frame relies on its lever-amplification characteristics to give priority to energy dissipation and shock absorption, thereby effectively reducing the seismic energy input into the main steel frame and suppressing 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 on the basis of improving the overall seismic performance of the structure after reinforcing the existing building structure, and prevent the occurrence of concentrated damage and damage to weak layers.

[0017] Furthermore, the interface between the external rocker frame and the main steel frame is the primary deformation zone of the structural system. Installing dampers allows for concentrated dissipation of seismic energy. This structural measure significantly reduces the proportion of energy dissipated by the main structural components by regulating the energy distribution path, effectively suppressing the accumulation of structural damage. Post-earthquake, simply replacing the damaged dampers allows for rapid restoration of the structure's usability.

[0018] Furthermore, the butterfly damper has stable performance and is easy to process, and can provide stable energy dissipation capacity for the structure.

[0019] Furthermore, the self-righting displacement damper improves the seismic performance of the structure through a dual action mechanism: its displacement-related energy dissipation characteristics significantly enhance the energy dissipation capacity of the structure, while the built-in self-righting force effectively suppresses the accumulation of residual plastic deformation, achieving autonomous recovery of the structural performance after the earthquake.

[0020] Furthermore, the displacement amplification effect can be controlled by the lever amplification system to meet the energy consumption requirements of different structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the lever-amplified self-resetting hinged swing frame structure of the reinforced steel frame structure of the present invention; Figure 2 This is a elevational layout diagram of a single-bay structure of the present invention; Figure 3 This is a schematic diagram of the structure of the external swing frame of the present invention; Figure 4This is a schematic elevation diagram of the external swing frame of the present invention; Figure 5 This is a schematic diagram of the ear plate-pin structure of the present invention; Figure 6 This is a schematic diagram of the rigid connector structure of the present invention; Figure 7 This is a schematic diagram of the connection structure of the butterfly steel plate damper of the present invention; Among them: 1. Main steel frame, 2. External swing frame, 3. Rigid connector, 4. Seventh hinge point, 5. Damper, 6. High-strength bolts, 7. Longitudinal horizontal support, 8. Foundation, 9. Main frame column stiffening ribs, 10. Middle column, 11. Crossbeam, 12. Side column, 13. Crossbeam stiffening ribs, 14. First middle column stiffening ribs, 15. Diagonal brace, 16. First side column stiffening ribs, 17. Second side column stiffening ribs, 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 middle column stiffening ribs, 29. Eighth hinge point. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrally connected; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internally connected between two elements or an interactive relationship between two elements. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0027] 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.

[0028] The main steel frame 1 is provided with main frame column stiffening ribs 9 at the column bottom.

[0029] 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 a structural surface.

[0030] like Figure 3-6 As shown, multiple external swing frames 2 are set on either side or both sides of the main steel frame 1. The number of external swing frames on each side is the same as the number of main steel frames on the corresponding side. The main steel frame 1 and the external swing frames 2 are horizontally connected by rigid connectors 3 and dampers 5 of box-section, and the longitudinal connection is achieved by welding longitudinal horizontal supports 7 between the columns. The rigid connector 3 is connected to the eighth hinge point 29 through the seventh hinge point 4. The hinge point is achieved through a pin-ear plate structure. The ear plate is connected to the column and side column 12 of the main steel frame 1 by welding. The specific ear plate and pin shaft dimensions can be designed according to the "Steel Structure Design Standard". All the hinge point implementation methods, ear plate pin shaft design methods, and ear plate and structural member connection methods described later all adopt the same method. Figure 7 As shown, the damper 5 is a butterfly damper. To effectively realize post-earthquake replacement, the damper 5 is connected to the main steel frame 1 and the external swing frame 2 through high-strength bolts 6.

[0031] The number of rigid connectors 3 matches the number of layers of external swing frames 2, and their installation elevation is flush with crossbeam 11. Rigid connectors 3 are box-section with lugs welded at both ends. They are connected to the main steel frame 1 and external swing frames 2 via the seventh hinge point 4 and the eighth hinge point 29.

[0032] The rocking 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 cross beams 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 arranged between adjacent layers of cross beams. 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.

[0033] In order to avoid spatial conflicts between the lever amplification system and the rocking frame, the side columns 12 are half the height of the bottom floor compared to the center column 10 .

[0034] To prevent local buckling, the side columns 12 are provided with first side column stiffening ribs 16 in the horizontal direction and second side column stiffening ribs 17 in the vertical direction, the cross beams 11 are provided with vertical cross beam stiffening ribs 13, and the middle columns 10 are provided with first middle column stiffening ribs 14 in the horizontal direction and second middle column stiffening ribs 28 in the vertical direction.

[0035] 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 realized by an ear plate-pin shaft structure.

[0036] 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 is connected 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, and the fourth hinge point 21 is also the fulcrum of the amplifying lever.

[0037] The triangular bracket is made of a pair of H-shaped steel short columns, the upper part of which is processed into a "Γ"-shaped cut and then welded.

[0038] 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 base 8 via the sixth hinge point 25 .

[0039] The length of the components in the lever amplification system must meet l 1≥ θl 2 To ensure the system works effectively, the displacement amplification effect can be adjusted by adjusting the lever ratio l 1 / l 3 implementations, where l 1 is the distance between the axis centers of the pins of the third hinge point 20 and the fourth hinge point 21, θ is the rotation angle of the rocking frame under horizontal earthquake action, l 2 is the length of the bottom diagonal brace 15, l 3 is the distance between the axis centers of the pins of the fourth hinge point 21 and the fifth hinge point 23.

[0040] The damper 5 is a butterfly steel plate damper, connected to the main steel frame 1 and the external swing frame 2 by high-strength bolts 6 at both ends. The damper 5 is preferably made of low-yield point steel to provide better energy dissipation capacity and fatigue performance for the structure.

[0041] 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 are in an elastic stress state during the swinging process.

[0042] The assembly method of the lever-amplified self-resetting hinged swing frame structure of the reinforced steel frame structure comprises the following steps: Step 1: Weld the ear plate in the first hinge point 27 to the foundation 8 and the center column 10.

[0043] Step 2: Weld the swing frame support 15 and the crossbeam 11 on both sides of the center column 10, weld the side column 12 to the crossbeam 11 and the support 15, and weld the stiffening ribs 13, 14, 16, and 28. Open bolt holes for connecting the damper 5 at the corresponding positions of the side column 12 to form a single external swing frame 2.

[0044] 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 columns 12 and the side columns of the main steel frame 1.

[0045] Step 4: Hoist the external swing frame 2 to form the first hinge point 27.

[0046] Step 5: Hoist the rigid connector 3 to form the seventh hinge point 4 and the eighth hinge point 29 .

[0047] Step 6: Connect the two ends of the butterfly steel plate damper 5 to the side columns 12 and the side columns of the main steel frame 1 through high-strength bolts 6.

[0048] Step 7: Weld the longitudinal horizontal support 7 to the side columns 12 and the side columns of the main steel frame 1, thereby realizing the longitudinal connection between the external swing frame 2 and the main steel frame 1.

[0049] Step 8: Assemble the lever amplification system and the self-resetting displacement damper 24 .

[0050] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0051] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0052] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0053] The units described as separate components may or may not be physically separate, and 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 may be selected according to actual needs to achieve the purpose of the present embodiment.

[0054] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

[0055] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A lever-amplified self-resetting hinged swing frame structure with a reinforced steel frame structure, characterized in that: It includes a main steel frame (1), an external swing frame (2), a damper (5), a lever amplification system and a self-resetting displacement damper (24); The external swing frame (2) is arranged on one side or both sides of the main steel frame (1), and 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-layer 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 a first hinge point (27); The lever amplification system includes a vertical connecting rod (19) connected to the lower end of the side column (12), an amplifying lever (22) and a triangular bracket (26) fixed to the base (8), wherein the end of the vertical connecting rod (19) away from the side column (12) is hinged to the head end of the amplifying lever (22), and the middle part of the amplifying 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 base (8); the external swing frame (2) is laterally connected to the main steel frame (1) using a rigid connector (3) and a damper (5).

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

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

4. The lever-amplified self-resetting hinged swing frame of the reinforced steel frame structure according to claim 3 is characterized in that: Both ends of the butterfly steel plate damper (5) are connected to the main steel frame (1) and the external swing frame (2) respectively using high-strength bolts (6).

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

6. The lever-amplified self-resetting hinged swing frame of the 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 a fifth hinge point (23), and the lower end is hinged to the base (8) via a sixth hinge point (25).

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

8. The lever-amplified self-resetting hinged swing frame of the reinforced steel frame structure according to claim 1, characterized in that: The external swing frame (2) and the main steel frame (1) are longitudinally connected via a longitudinal horizontal support (7).

9. The lever-amplified self-resetting hinged swing frame of the reinforced steel frame structure according to claim 1, characterized in that: Diagonal braces (15) connecting the center column (10) and the side columns (12) are provided between adjacent layer cross beams.

10. An assembly method of a lever-amplified self-resetting hinged swing frame structure based on the reinforced steel frame structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Assemble to form a single external swing frame (2); hoist the external swing frame (2) so that its bottom is hinged to the foundation (8) through the first hinge point (27); install the rigid connector (3) and the damper (5) to achieve the lateral connection between the external swing frame (2) and the main steel frame (1); assemble the lever amplification system and install the self-resetting displacement damper (24), and connect the self-resetting displacement damper (24) between the amplification lever (22) and the foundation (8).

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